SettingsDr. Zohra Sattar Waxali earned her doctorate in chemistry and biochemistry from Northwestern University, specializing in the metallomes of cardiac cells and stem cells, and their impact on biological function. Her research encompasses the development of arsenoplatin chemotherapeutics, stapled peptide estrogen receptor inhibitors, and antimicrobial natural products.
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Check out the quiz created for students to test their knowledge and understanding of the properties of matter. Quiz yourself on the concepts involved with matter including states of matter, changes in matter, what is matter, what is mass, volume, density, etc. There is a list of 20 questions. Please read them carefully and answer. Don't forget to share the quiz after you are done taking it. Well, what are you waiting for? Let's try out the quiz. All the best!
Explanation
The density of an object is a physical property because it is a characteristic that can be measured or observed without changing the substance's chemical composition. Density is defined as the mass of an object divided by its volume, and it is a property that helps identify and classify different materials.
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Explanation
A pure substance always has the same density when measured under the same conditions. This means that regardless of the amount or size of the substance being measured, its density will remain constant as the conditions under which the measurement is taken, such as temperature and pressure, remain the same. Therefore, both the substance's density and the measurement conditions are consistent, resulting in the answer "the same; the same."
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Explanation
A solution is a type of mixture. A mixture is formed when two or more substances are combined physically but not chemically. In the case of a solution, one substance is dissolved in another, resulting in a homogeneous mixture where the particles of the solute are evenly distributed throughout the solvent. Solutions can be formed with various combinations of substances, such as solids dissolved in liquids, gases dissolved in liquids, or even gases dissolved in other gases. Therefore, the correct answer is mixture.
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Explanation
Mass is measured on a balance. A balance is a device that compares the mass of an object to a known mass, typically using a lever or beam and a set of calibrated weights. It provides an accurate measurement of the mass of an object by comparing it to a standard mass. A scale, on the other hand, measures weight, which is the force exerted by an object due to gravity. While weight and mass are related, they are not the same thing, and therefore, mass cannot be measured on a scale.
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Explanation
A change in physical state does not signal a chemical change because it is a physical change. A change in physical state refers to a substance transitioning from one state (solid, liquid, gas) to another without altering its chemical composition. In contrast, the production of gas, color change, and production of light and heat are all indicators of a chemical change, as they involve the rearrangement of atoms and the formation of new substances.
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Explanation
Making skim milk involves separating the fat content from the milk by using physical properties. Skim milk is made by removing the cream layer from whole milk, which is done through processes like centrifugation or gravity separation. These methods rely on the physical difference in density between the cream and the milk to separate them. Therefore, the correct answer is using physical properties to separate a mixture.
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Explanation
Weight is a measure of the force of gravity acting on an object, and it depends on both mass and the strength of the gravitational field. Since the strength of gravity is weaker at higher altitudes, a person's weight will be slightly lower on a high mountain compared to at sea level. This is why people often weigh slightly less when they are at high altitudes.
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Explanation
The given scenario describes a situation where two similar substances are burned and produce different colored flames. This is a characteristic of a flame test, which is a method used to identify elements or compounds based on the color they emit when burned. The different colors of the flames indicate the presence of different elements or compounds in the substances being tested. Therefore, the correct answer is a flame test.
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Explanation
The correct answer is "Sugar is soluble in water, but pepper is not." Sugar is sucrose–a polar molecule that readily dissolves in water. Pepper is made from crushing part of a plant and cannot dissolve in water as a small molecule would.
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Explanation
Physical properties refer to the characteristics of a substance that can be observed or measured without changing the substance into something else. These properties include color, size, and hardness. Reactivity, on the other hand, refers to how a substance reacts with other substances. Evaporation is a process where a substance changes from a liquid to a gas, and chemical properties refer to the characteristics of a substance that describe its behavior in chemical reactions. Therefore, physical properties are the correct answer as they can be determined without altering the substance's identity.
