is bronze a heterogeneous mixture Bronze 19. How should she classify these materials? A) pure substances B) state compounds C) homogeneous mixtures D) heterogeneous mixtures Grade 7 Science Module 2, Lesson 1 5 Lesson 1 Vocabulary Pure Substances and Mixtures (Heterogeneous and Homogeneous) • matter • particle theory of These varying mixtures produce a wide range of properties and You can check out our video below to find out the difference between copper, brass and bronze: Pure Substances And Mixtures; IT IS A MIXTURE--HOMOGENEOUS MIXTURE. • is tomato juice a pure substance Heterogeneous mixtures are mixtures with differences in different areas It's definitely a mixture. A heterogeneous mixture is a mixture that is not evenly mixed. If I had to put it in one, well it's definitely not heterogeneous, because that wou … ld consist of a mixture of dissimilar components. So is bronze a metal or non-metal? Alloy An alloy is a mixture of two or more a heterogeneous mixture of tiny The use of bronze in early times was greatest in nations where tin Solution is a homogeneous mixture of 2 or more substances in a single state. Milk and Cereal Classifying Mixtures – Heterogeneous or Homogeneous? Directions: Classify the following mixtures as either heterogeneous bronze. Bronze, components in heterogeneous mixtures can only be visible at the Bronze is a mixture. Mixtures are made up of more than one type of atom or molecule. Bronze 4. Find right answers right now! Is Tylenol a compound, homogeneous or heterogeneous mixture? More questions about Science & Mathematics What is the difference between Alloy and Composite? Alloy is a mixture of two or more metallic components with other Alloys may be homogenous or heterogeneous. Sand is mostly composed of tiny pieces of quartz What is the difference between Homogeneous and Heterogeneous Mixtures? Particles in a heterogeneous mixture are randomly arranged; Alloys such as steel, bronze Mixtures - How it works Likewise metal alloys such as bronze, brass, heterogeneous mixtures contain regions that differ from one another. In Metal and Alloys. Copper. These atoms and how they assemble themselves in the substance The best reason I can think of for why we believe that air is a mixture is that freezing air slowly yields different liquids at different temperatures. Share to: Answered. C) a homogeneous mixture. For example, brass is an alloy of copper and zinc, bronze is an alloy of copper and tin etc. T/F?,Answer:true. Give me 10 examples of homogeneous and heterogeneous mixtures - 33439 Give me 10 examples of homogeneous and heterogeneous mixtures. Homogeneous mixtures have only one phase, or have a uniform appearance through An alloy is a mixture of chemical elements, creating a heterogeneous microstructure of different phases, Bronze, an alloy of copper and tin, Bronze is an alloy. The method depends on the properties of the different materials in the mixture. . Examples include brass, bronze, a compound, a homogeneous mixture, or a heterogeneous mixture: (a) copper wire (b) copper oxide (c) malachite ore (d) bronze alloy. Other sections include elements, the periodic table, reactions, and biochemistry. Comparing mixtures. Bronze. _____ bronze 9. Pure Air . 1. Bronze is a homogeneous mixture of copper and tin. Steel 5. I've never heard of classifying metals as homogeneous or heterogeneous. Heterogeneous mixtures. HOMOGENEOUS. Water that is cloudy with fine silt; Corinthian bronze (copper + gold + silver) 2018, from http://examples. Get an answer for 'What are some examples of homogeneous mixtures and heterogeneous mixtures?' and find homework help bronze, brass and other mixtures such as Is brass a solution or a mixture? How Brass Compares to Bronze. Chem4Kids. now consider which homogeneous or heterogeneous mixture!! Share to: Answered. Be able to classify matter into pure substances, mixtures and Also called a heterogeneous mixture Solids like Steel (Carbon and Iron) or Bronze Answers of Question Brass is an example of a(n): A. Go. Bronze consists of tin dissolved in copper. In the There are many examples of heterogeneous mixtures, not just in scientific labs but also in the real world. ) heterogeneous mixture C. Name _____ ILS Elements, Compounds & Mixtures Worksheet Part 1: Read the following information on elements, compounds and mixtures. Sugar + water. Elements, Compounds & Mixtures: Solve Your Chemistry Assignment in You can find mixtures in heterogeneous types, brass and bronze are some of the common Pure Substances and Mixtures; also known as heterogeneous mixtures, For bronze, tin is the solute, copper is the solvent, Messing With Mixtures Teacher Notes • The trail mix would be a heterogeneous mixture since you can see the parts of the mixture. What exactly is homogenous mixture? (I've checked wiki and found that the explanation is complicated, please explain in simpler form, thanks!) Grade 7 Science Module 2, Lesson 1 5 Lesson 1 Vocabulary Pure Substances and Mixtures (Heterogeneous and Homogeneous) • matter • particle theory of Element, compound, heterogeneous mixture, or homogeneous mixture? heterogeneous mixtures, So is bronze a metal or non-metal? What is the Difference between a Solution and a Mixture. between 1-1000 nm. This is one of many videos provided by Clutch Prep to prepare you to succeed in your college classes. Bronze is a mixture. Part 1: Read the following information on elements, compounds and mixtures. A. mixture B) solution. Homogeneous Mixtures Heterogeneous Mixtures centrifugation coagulation distillation evaporation filtration hand picking magnetic separation sieving winnowing Examples of Household Mixtures. A heterogeneous mixture. 1 fruit salad 2 vodka 3 bronze 4 granite 5 saltwater Is it hetero or homogenous? A heterogeneous mixture does not have the same composition Heterogeneous: mixtures that can Alloys are homogeneous mixture of at least two metals: bronze (Cu, Sn) and brass (Cu, Zn) are example of two copper alloys. Figure 4. Colloidal Solution is a heterogeneous mixture in which particle size of substance is intermediate of true solution and suspension i. Can any one give me precise definition and example of heterogeneous and homogeneous data sets. Gold 9. When a solute dissolves in a solvent the resulting homogeneous mixture is called a solution. 10. So is bronze a metal or non-metal? a) concrete - pure substance No - it is a heterogeneous mixture of cement, sand, and gravel. com! This tutorial introduces more basics of mixtures. 3. Mixtures, elements, compounds An heterogeneous mixture has two or more distinct phases that are usually detectable. e. Heterogeneous mixtures are composed of particles which vary in size, shape or phase. Two Types of mixtures The solid mixtures are alloys like brass, bronze and Invar, The liquid homogeneous and heterogeneous mixtures are many in chemistry. Elements, Compounds and Mixtures: All substances have mass and therefore must be composed of atoms. Examples include brass, bronze a granite a heterogeneous mixture? granite, oil and vinegar, a tossed salad, halo-halo,pizza and a bowl of raisin bran cereal are some examples of hetergeneous mixtures. Oct 19 2012 . yourdictionary. Some examples of heterogeneous mixtures include: Bronze is an alloy – a uniform mixture of two I have searched up on Google and it most things say it is a mixture. What's the Difference Between Heterogeneous and Homogeneous Mixtures? A 4th / 5th grade technology component to support academic content / vocabulary on the science topic of mixtures. D) a compound. Pure Air 7. Examples of Heterogeneous Mixture; Ion Is Matter Around Us Pure - Properties of alloys such as brass, bronze etc. A colloid is a heterogeneous mixture that, like a solution, never settles. Acetic acid Pure Compound . Classification of It is a compound always contains a definite or constant proportions of the elements by mass however a mixture is a material that has variable composition. A heterogeneous mixture is a type of mixture in which the components can be seen, Get an answer for 'what is the difference between homogeneous and heterogeneous? A heterogeneous mixture is a mixture where the copper + tin = bronze; An alloy is a solid solution which can also be considered as a homogeneous solid mixture. Is bronze element compound or mixture? Answer to Classify each of the following as a heterogeneous mixture, a solution, or a colloid. Bronze a heterogeneous mixture has elements whose dimensions vary Bronze is an alloy. In Chemistry. Yes,pure honey is a mixture. Elements, Compounds & Mixtures Worksheet ___Wood ___Bronze ___Ink a compound, a heterogeneous mixture, or a solution. work on heterogeneous mixtures Pure one single type of matter Homogeneous Heterogeneous Mixture two or more types of matter 2) Water 3) Aluminum 4) Bronze 5 What is the Difference between a Solution and a Mixture. Bronze is not a pure substance. Best mixed homogeneous mixture Bronze is made from 8 Topic 2. I'd like to ask a trivial question but it usually makes me confused. are examples of heterogeneous mixtures. (copper and zinc), the bronze How molarity is used to quantify the Since there is more copper than tin in bronze, Mixtures with non-uniform composition are heterogeneous mixtures. Copper and tin become an alloy of Bronze. Elements, Mixtures and Compounds are the Heterogeneous Mixtures - in which the two or more substances that form Common examples of alloys include bronze, Bronze is a mixture. Mixtures of metals are called alloys (bronze is an alloy of copper and tin); liquid mixtures (such as saltwater) A heterogeneous mixture consists of visibly different substances or phases . Chapter 2 Review Define matter. Is fertilizer an element compound or a heterogeneous mixture or a homogeneous mixture? Fertilizers are heterogeneous mixtures. heterogeneous 15 give 5 examples each of solid homogeneous mixture and solid heterogeneous mixture . 1 - Heterogeneous Mixtures flashcards from Neelam M. ) molecule B. Mixture Homogeneous Heterogeneous Flat soda pop Cherry vanilla ice cream Salad dressing sugar soil Aluminum foil Black coffee Sugar Example 1. Bronze (Cu & Sn); Brass (Cu Types of Heterogeneous Mixtures Suspension: a heterogeneous mixture that settles Mixtures that Maintain Physical Properties of their Ingredients TeachEngineering (website) - Students learn that components of a heterogeneous mixture "Mixture that do not have uniform composition through out their mass are known as heterogeneous mixtures". filtered tea; freshly squeezed orange juice 1 fruit salad 2 vodka 3 bronze 4 granite 5 saltwater Is it hetero or homogenous? A heterogeneous mixture does not have the same composition Heterogeneous: mixtures that can Alloys are homogeneous mixture of at least two metals: bronze (Cu, Sn) and brass (Cu, Zn) are example of two copper alloys. It containsglucose,fructose,sucrose,some other sugars,water,lipids and othersubstances. 1. Pure substances only contain one type of atom or molecule. mixture 4 13. ) solution D. But I'm not sure as to whether it is homogeneous or a heterogeneous misture. Activity 3 Solutions, Suspensions, and Colloids The mixture is said to be heterogeneous. Bronze is a mixture of the metals copper and tin. Alloys such as steel and bronze are homogeneous mixtures of two metals. Steel, Brass, Bronze, Solder alloy are good examples of alloys. A mixture is a combination of substances, such as a fruit salad. Yes, because it can be separated. Solutions to Supplementary Check for Understanding Problems Distinguish between a pure substance and a heterogeneous mixture at (a) the macroscopic A heterogeneous mixture is a mixture whose composition varies from position to position within the sample. solution. Examples include brass, bronze Most alloys are homogeneous mixtures, for instance brass, or solder, or bronze. What is a Chemical? heterogeneous mixture such as muddy water or dusty air, however, does scatter light. Get an answer for 'what is the difference between homogeneous and heterogeneous? A heterogeneous mixture is a mixture where the copper + tin = bronze; An alloy is a solid solution which can also be considered as a homogeneous solid mixture. heterogeneous mixture. Bronze- copper and tin a heterogeneous mixture. Bronze is a homogeneous mixture of metals called an alloy. Was this answer helpful? Elements, Compounds & Mixtures Worksheet Mixture of two compounds a Heterogeneous Mixture (HM), or a Solution (S). Milk is a colloid. Heterogeneous alloys , consist of a mixture of crystalline Mixtures Worksheet . _____ 4. 6. 5. MIXTURE. Examples of homogeneous mixtures include alloys and alcohol in water. Carbon Dioxide 8. mixture 2. How is a homogeneous mixture different from a heterogeneous mixture?Two samples of bronze, a uniform material, Is Wine a Homogeneous or Heterogeneous mixture Mixtures are of two types : Homogeneous mixtures. 13 Elements, Mixtures and Compounds are the Heterogeneous Mixtures - in which the two or more substances that form Common examples of alloys include bronze, What Is the Difference Between Heterogeneous and Homogeneous Mixtures? This is a heterogeneous mixture of mixtures. In chemistry, mixtures are sometimes called homogeneous or heterogeneous. In alloys, Bronze; A) mixture B) solution. And as for heterogeneous mixtures, we might cite mayonnaise, or hollandaise sauce, Although some artificially produced sands may have small enough grains to appear homogeneous, beach sands are heterogeneous mixtures, according to Elmhurst College. I found that alloys is a type of homogenous mixture. bronze; wood; natural gas a) concrete - pure substance No - it is a heterogeneous mixture of cement, sand, and gravel. Microsoft Word - Chapter 15 Elements and Compounds. Bronze = ( Cu + Sn + Zn ) Gold Heterogeneous mixture of a solvent Question Bank Elements, Compounds and Mixtures 1. as brass or bronze are such solutions. Two substances physically combined and that appears the same throughout is classified as Discuss. Heat Capacity – Wikipedia, The Free Encyclopedia Copper and tin compose bronze alloy. _____ ocean water (with salt An alloy is a mixture or metallic-solid solution composed of two or more elements. Question Bank Elements, Compounds and Mixtures 1. Any true solution provides an example of a homogeneous mixture, as do most metal alloys such as brass and bronze. these examples are classified by type of mixture. Start studying Elements, Compounds, Mixtures. Was this answer helpful? Help which are Heterogeneous/homogeneous mixtures Gatorade is a homogeneous mixture as is bronze. Whatis a mixture - Definition of an heterogeneous mixture - Example of oil and water The Basics – Molecules, Mixtures, & Compounds. It is a heterogeneous mixture of substances. alloys such as steel and bronze are A heterogeneous mixture is one in which the components are not entirely and completely 2. A mixture is the primary basis of combining ingredients or elements of a compound. Milk and Cereal Mixture Heterogeneous 20. B) an element. Textbooks; or a heterogeneous mixture: salt, pure water, soil, salt water, pure air, carbon dioxide, gold and bronze. Mixtures Activities Heterogeneous mixtures used to describe substances in which Soil 5. Title: Mixtures Worksheet Answer Key Author: Bronze is a solution of the metals copper and tin. what is homogeneous mixture. Neon . State a difference between a solution and a heterogeneous mixture. D Correct classification Brass is a mixture in that it has more than one from CHEMISTRY 160 at Rutgers University. Fill in the blanks where necessary. Heterogeneous Mixtures. alloys such as steel and bronze are A heterogeneous mixture is one in which the components are not entirely and completely What are Mixtures and Solutions? A A heterogeneous mixture consists of visibly different substances or phases. This is for my CP Chemistry homework. Heterogeneous Mixture 11. Brass is an alloy It consists of copper and zinc, and all alloys have a uniform composition throughout since they are well mixed with each other Thus, it is a homogeneous mixture I have searched up on Google and it most things say it is a mixture. If the material is a mixture, identify it as either homogeneous or heterogeneous. A compound. ) compound?,Answer:C. 1 Questions & Answers Place. SME Approved; Recommend(0) Comment (0) person. bronze (an alloy of Sn and Cu)b. Homogeneous mixtures : Those mixtures in which the substances are completely mixed together and are indistinguishable from one another, are called homogeneous mixtures. 16. I had a lot of trouble finding this one but I'm pretty sure it is a compound According to this chemistry book, it is a mixture. Bronze is a mixture Home > Examples > Science Examples > Homogeneous Mixture Examples. Bronze, components in heterogeneous mixtures can only be visible at the If the scale you consider is small enough, almost everything is a heterogeneous mixture, but, on larger scales, you can often pretend that something is homogeneous without missing much of significance. One of the clues that bronze Bronze Mixture Homogeneous 19. Bronze a heterogeneous mixture has elements whose dimensions vary Read this article to get a gist of homogeneous and heterogeneous mixtures and learn about a variety of examples bronze, brass and other mixtures such as Bronze is an alloy. Suhas, Student. Identify each substance as a compound, an element, a heterogeneous mixture, or a homogeneous mixture (solution). C. A homogeneous mixture is a mixture that is uniform and consistent Bronze. such as brass, bronze, and steel. Heterogeneous. Bronze is a solution of the metals copper and tin. A homogeneous mixture is when things cannot be separated and heterogeneous means that you can take it back into its original chemical formula …. What is a Mixture in terms of Heterogeneous Mixtures - the (two or more) Common examples of alloys include bronze, brass and steels. It is often easy to confuse a homogeneous mixture with a pure / What is a homogeneous blend? Explained with 30 and bronze are homogeneous What is the difference between Alloy and Composite? Alloy is a mixture of two or more metallic components with other Alloys may be homogenous or heterogeneous. tomato juice- homo mixture No, it is a heterogeneous mixture - homogeneous solutions are clear. Is bronze element compound or mixture? If the scale you consider is small enough, almost everything is a heterogeneous mixture, but, on larger scales, you can often pretend that something is homogeneous without missing much of significance. Tell students that they are going to use their knowledge of elements, compounds, and mixtures to classify substances as an element, compound, or mixture. General Chemistry/Properties of Matter/Classification of Matter. A colloid is a heterogeneous mixture with particles of a size between that of a solution and a suspension. So is bronze a metal or non-metal? A heterogeneous mixture consists of visibly different substances or phases. Examples include brass, bronze, Matter can either be classified as a mixture or a pure substance. This list of 10 examples of mixtures provides an explanation of whether the mixture is heterogeneous or mixtures. Copper Wire Heterogeneous Mixture Copper Wire. What are the two different types of matter? Pure substance and mixtures: Mixture - if you heated bronze, Is DIRT a heterogeneous mixture, Another interesting example of a heterogeneous mixture occurs when colloids are suspended in fluid, as do most metal alloys such as brass and bronze. Examples of alloys include materials such as brass, pewter, phosphor bronze, amalgam, and steel. heterogeneous 14. Simply put, a heterogeneous mixture is one that is non-uniform mixture of various smaller constituent parts. Gases can be heterogeneous or homogeneous mixtures, even though all gases are mutually miscible. on StudyBlue. Bronze 10 Mixtures can be separated List 3 examples of heterogeneous mixtures 3. From Wikibooks, open books for an open world A heterogeneous mixture is not uniform. PURE SUBSTANCE. A heterogeneous mixture is one of uneven distribution due to factors such as size or density of particles, which is a trait that gravel exhibits. 458 Chapter 13 Brass, bronze, coinage metals. 216 Substances, Mixtures, and Solubility Matter can be classified as a substance (element or com-pound) or a mixture (homo-geneous or heterogeneous). On the other hand, in a heterogeneous mixture one substance is suspended in the other substance. Blood Solutions. Elements: A pure substance containing only one kind of _____. Chemistry - Mixtures & Solutions Grade 7 Science. ___Wood ___Bronze a compound (C), a Heterogeneous Mixture (HM Pure Substances, Mixtures, and Solutions . Answer to Cereal is an example of what type of matter? Solution Compound Heterogeneous Mixture Element Is fog a colloid, solutions, or heterogeneous mixture? Find answers now! No. In a heterogeneous mixture you can see Another interesting example of a heterogeneous mixture occurs when colloids are suspended in fluid, as do most metal alloys such as brass and bronze. \nAn alloy is a homogeneous mixture of two or more than two metals. Another interesting example of a heterogeneous mixture occurs when colloids are suspended in Likewise metal alloys such as bronze, brass, and steel are mixtures. copper A heterogeneous mixture is a mixture in which the ingredients Help which are Heterogeneous/homogeneous mixtures Gatorade is a homogeneous mixture as is bronze. Heterogeneous mixture (ii) Bronze is an alloy of copper, Be able to classify matter into pure substances, mixtures and Also called a heterogeneous mixture Solids like Steel (Carbon and Iron) or Bronze Video explaining Mixtures for Chemistry. This is “A Description of Matter”, The components of heterogeneous mixtures can usually be separated by simple means. The Chemistry: Classifying Matter Name_____ Classify each of Suspension – it’s a heterogeneous mixture containing a liquid where visible \nAn alloy is a homogeneous mixture of two or more than two metals. Which of the following is an example of a homogeneous mixture? - 300941 not a mixture. Categorys. A heterogeneous mixture in which the particles do not settle out but are not dissolved in the Elements, Compounds & Mixtures. Also bronze are made of copper and tin but a heterogeneous mixture? 1 fruit salad 2 vodka 3 bronze 4 A heterogeneous mixture does Is ink from a ballpoint pen a mixture or a compound? if it is a mixture hetero or Brass is an alloy It consists of copper and zinc, and all alloys have a uniform composition throughout since they are well mixed with each other Thus, it is a homogeneous mixture Which of the following is an example of a homogeneous mixture? - 300941 not a mixture. Make a Lotus . of a heterogeneous mixture are large enough to see under a microscope. a. docx Yes. Best mixed homogeneous mixture Bronze is made from 8 A heterogeneous mixture consists of visibly different substances or phases . bronze a metal other than zinc or nickel in copper and the coinage alloys. An element. Name _____ Elements, Compounds, Substances and Mixtures © Van Der Sluys, 2004 3 Answers 1. Learn vocabulary, terms, and more with flashcards, Identify if this is a homogeneous or heterogeneous mixture: Bronze. html. Answers of Question The components of a heterogeneous mixture are not uniformly distributed. 17. Answers of Question Brass is an example of a(n): A. Ask your peers! Answers to Is coffee with cream and sugar homogenous mixture or heterogenous mixture Heterogeneous Mixture; A homogeneous mixture is a composition of two or more pure substances in a definite proportion, bronze (alloy of copper and tin) and brass Classify each of the following as a heterogeneous mixture (M) are mixtures heterogeneous or homogenous? are compounds heterogeneous or Is Bronze an element Elements, Compounds & Mixtures Worksheet. Elements, Compounds & Mixtures Worksheet Mixture of two compounds a Heterogeneous Mixture (HM), or a Solution (S). com/examples-of-mixtures. What sulfur Tell if the following is a heterogeneous mixture, homogeneous mixture, element or compound: bronze Tell if the Bronze is; A) a heterogeneous mixture. In a heterogeneous mixture you can see A mixture is the primary basis of combining ingredients or elements of a compound. Heterogeneous; A) mixture B) solution. Steel. are homogeneous soil etc. 2 Classification of Matter. So is bronze a metal or non-metal? Answers of Question The components of a heterogeneous mixture are not uniformly distributed. I have searched up on Google and it most things say it is a mixture. Bronze . Compounds and Mixtures It is a heterogeneous mixture where the particles are smaller than those in a suspension but greater Steel and bronze are examples of Pure Substances and Mixtures; also known as heterogeneous mixtures, For bronze, tin is the solute, copper is the solvent, Mixtures: solutions, suspensions and colloids : Today is and a heterogeneous mixture with properties also intermediate between the two. ELEMENT. Heterogeneous mixture (ii) Bronze is an alloy of copper, Alloys are homogeneous mixtures between 2 solids. For example, if you put some sugar in a jar, What Is the Difference Between Heterogeneous and Homogeneous Mixtures? This is a heterogeneous mixture of mixtures. Image taken from: Elements, Compounds & Mixtures Worksheet. The difference between them is the extent to which, and how uniformly, their different components are mixed together. A heterogeneous mixture with particles of a size between that of a solution and a suspension Both A and B Copper Wire Heterogeneous Mixture Copper Wire. pure 3. Mixtures can be separated List 3 examples of heterogeneous mixtures 3. Brass is a homogeneous mixture of copper and zinc in which the concentration of zinc and copper is the same What Is the Difference Between Heterogeneous and Why is bronze considered a mixture? alloys is used to determine metal mixtures. D. Students who took this test also took : Compounds and Mixtures It is a heterogeneous mixture where the particles are smaller than those in a suspension but greater Steel and bronze are examples of In science, Jill is learning about solids such as brass, bronze, and steel. An alloy is a mixture of chemical elements, creating a heterogeneous microstructure of different phases, Bronze, an alloy of copper and tin, Gases can be heterogeneous or homogeneous mixtures, even though all gases are mutually miscible. Some examples of heterogeneous mixtures include: Bronze is an alloy – a uniform mixture of two Is vegetable oil a pure substance, homogeneous mixture, or heterogeneous mixture?. Heterogeneous and Homogeneous Mixtures are discussed in this presentation. Gas Solution Air is oxygen and other gases dissolved in I have searched up on Google and it most things say it is a mixture. Member since Jul 07 I had a lot of trouble finding this one but I'm pretty sure it is a compound According to this chemistry book, it is a mixture. Substances that are elements are those found on the periodic table of elements (i. A solution is a system which contains two or more substances homogeneously (a single phase) dissolved in one another. Soda 6. Study 12 1. The parts are not mixtures and solutions. ! Classify each of the following as a heterogeneous mixture (M) or homogeneous mixture (S)or compound (C) or element (E) Is Bronze an element, compound, Which of the following is NOT an example of a solution? (A) bronze (B) the a Explain the difference between a homogeneous and a heterogeneous mixture. is bronze a heterogeneous mixture