Classification of Matter quiz #8 Flashcards
Classification of Matter quiz #8
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What are substances that cannot be broken down into simpler substances? Elements. Which substance is a combination of different atoms? A compound is a combination of different atoms. What is a silicate? A silicate is a compound containing silicon and oxygen. What is another name for homogenous mixtures? Solutions. What is dry ice an example of? Dry ice is a pure compound (solid CO2). Why can some mixtures not be classified as solutions? Because their components are not evenly distributed. What are the characteristics of a mixture? Mixtures have variable composition and can be separated physically. Is cereal an example of a homogeneous mixture? No, cereal is a heterogeneous mixture. Which of the following describes a mixture in which the components remain distinct? A heterogeneous mixture. Which best describes a heterogeneous mixture? A mixture with visibly different components. Which of the following mixtures is homogeneous? Salt water is homogeneous. Which type of substance is milk? Milk is a mixture (colloid). Is coffee a homogeneous mixture? Yes, coffee is a homogeneous mixture. What is an example of matter? Water is an example of matter. Which choice is a compound? Carbon dioxide (CO2) is a compound. What distinguishes a substance from a mixture? A substance has a fixed composition; a mixture has variable composition. Which of the following are mixtures? Air, soil, and salad are mixtures. Can salt be a substance? Yes, salt (NaCl) is a pure compound. Is milk a mixture? Yes, milk is a mixture. Which type of mixture is soda an example of? Soda is a homogeneous mixture (solution). Is air a pure substance? No, air is a mixture. Which beverage is a homogeneous mixture? Tea is a homogeneous mixture. What are the defining characteristics of matter? Matter has mass and occupies space. Which is a characteristic of all mixtures? Mixtures have variable composition. What is a substance called that consists of a single type of atom? An element. Is sugar an example of a mixture? No, sugar is a pure compound. What kind of mixture is a solution? A suspension? A colloid? A solution is homogeneous; a suspension is heterogeneous; a colloid is intermediate. Which of these substances are elements? Gold and oxygen are elements. What is one property of a suspension that is different from that of a solution or a colloid? Suspensions have particles that settle out over time. What is the difference between a heterogeneous mixture and a homogeneous mixture? Homogeneous mixtures are uniform; heterogeneous mixtures are not. What are sugar and water in a homogenous mixture of sugar and water? Sugar is the solute; water is the solvent. What is anything that has mass and takes up space? Matter. Is sugar a pure substance? Yes, sugar is a pure compound. In what type of matter are atoms most tightly packed? In solids. Which of the following occupies a volume: solids, liquids, gases, all of the above? All of the above. Which must be a mixture of substances? Soil must be a mixture. Which statement is an identifying characteristic of a mixture? A mixture can be separated by physical means. Which of these mixtures are heterogeneous? Salad and soil are heterogeneous mixtures. Which term describes a mixture that is not uniform throughout? Heterogeneous mixture. Which is the best example of a mixture? Air is a good example of a mixture.
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