Name: 1. Which of the following is probably true about 300 ml of sand and 300 ml of water?

Transcription

1 Name: Jaguar Review #2 Physical Sciences Benchmark A: Relate uses, properties and chemical processes to the behavior and/or arrangement of the small particles that compose matter. 1. Which of the following is probably true about 300 ml of sand and 300 ml of water? A. They both probably have different volumes. B. They both probably have different masses. C. They both probably have the same color. D. They both probably have the same weight. 2. Which type of change results in a substance that has different properties than the original substance? A. A color change B. A size change C. A chemical change D. A physical change 3. What is true about the final product that goes through a physical change? A. None of the chemical properties are changed B. Some of the chemical properties may be changed C. Most of the chemical properties are changed D. All of the chemical properties are changed 4. Which of the following does not describe a physical or chemical change that occurs in everyday life? A. Cooking food B. Burning coal C. Freezing water D. All of the above describe a change 5. What happens to the matter in wood when it is completely burned? A. All the matter is lost B. Some of the matter is lost C. Some matter is lost, some changes form D. No matter is lost, all matter changes form 8

2 6. Which of the following is a physical change? A. digesting an apple B. boiling water C. burning a newspaper D. baking bread 7. The two graduated cylinders pictured can hold the same amount of water and use the same scale. A student measures the masses of two metal balls. One ball is made of aluminum and the other ball is made of lead. The student adds 50 ml of water to each graduated cylinder and then drops one metal ball into each graduated cylinder. The teacher asks the student to use the information she collected to compare the density of the two metal balls. The mass of the lead ball is 113 grams and the mass of the aluminum ball is 27 grams. What can the student infer about the density of these metal balls based on this investigation? A. The density of both metal balls is the same. B. The density of both metal balls is less than the density of the water. C. The density of the lead ball is less than the density of the aluminum ball. D. The density of the lead ball is greater than the density of the aluminum ball. 8. A tightly sealed glass box has a mass of 20,000 grams and contains a 5-gram cube of ice, making the total mass 20,005 grams. The box with the ice is placed in direct sunlight. After three hours, the box appears to be empty, with just small droplets along the sides of the box. Which statement describes the mass of the sealed box after sitting in the sun? A. The mass decreases because the ice melted into a liquid. B. The mass remains the same as the ice melts and then evaporates. C. The mass increases as the gases inside the box absorb energy and expand. D. The mass increases as the water vapor condenses into small droplets on the glass. 9. What is an example of a chemical change? A. melting an ice cube B. shredding paper C. burning a log D. dissolving salt in water 9

3 10. Both chemical and physical changes alter the form of matter. Which statement is also true about what occurs during a physical and chemical change? A. A small amount of matter is destroyed. B. A small amount of matter is created. C. Matter is never created nor destroyed. D. Energy flows from the original substance to the newly formed substance. 11. A scientist decides to conduct an experiment using a mixture. He begins by dissolving table salt in a glass of water. How does the scientist know that a physical change, not a chemical change, has occurred? A. The salt is no longer visible. B. The salt cannot be separated from the water with a filter. C. The mixture has a different density than the water without salt. D. The chemical properties of the salt and water have not changed. 12. The Law of Conversation Matter states that matter in a closed system can change form, but it cannot be created or destroyed. What does this mean in other words? A. The mass of each material in a reaction never changes. B. Matter may be altered, such as during a chemical reaction, but the total mass of the materials will remain the same after the reaction as before the reaction. C. As the mass of one material in a reaction goes down, the mass of the other material goes down in an equal amount. D. As the mass of one material goes up, the mass of another material goes up in an equal amount. 13. When a piece of copper metal is heated in air, it joins together with oxygen in the air (a chemical reaction). Then if the copper is weighed, it is found to have a greater mass than the original piece of metal. If the air was then measured with very specialized instruments, what can you expect the mass of the air to be? A. The same as before the chemical reaction. B. Less than before the chemical reaction. C. More than before the chemical reaction. D. Twice as much as before the chemical reaction. 10

4 14. Sarah wants to boil some water in a pot. She knows that when the water boils, it changes into steam, and some of the steam gets lost in the air. What could Sarah do to conserve the amount of water inside the pot? A. Use a different type of pot B. Start with more water in the pot C. Add salt to the boiling water D. Put a lid on the pot 15. Which is an example of a chemical change? A. A scientist melts ice to create water. B. A scientist shapes melted glass into a cylinder. C. A scientist grinds an iron rod to make iron fillings. D. A scientist mixes chlorine gas and sodium to make salt. 16. Which is an example of a physical change? A. A piece of paper burns. B. A steel rod is heated until it melts. C. Hydrogen and oxygen gases combine to make water. D. A plant changes water and carbon dioxide into sugar and oxygen. 17. What does the density of an object depend upon? A. Area and height B. Mass and volume C. Mass and height D. Weight and volume 18. Scientists heat one liter of water until it boils. How do they know this is a physical and not a chemical change? A. Bubbles appear in the water. B. The water seems to disappear. C. The water keeps the same chemical properties. D. The temperature of the boiling water remains at 100 C. 19. Why do the same volumes of different substances often have different masses? A. They have different densities. B. They have different hardnesses. C. They have different melting points. D. They have different degrees of electrical conductivity. 11

5 20. A class investigating the properties of different substances collected the data shown in the table below. Substance Mass Volume Water 2 g 2 cm Copper 17 g 2 cm Aluminum 11 g 4 cm Iron 31 g 4 cm Based on the table, which of these substances has the greatest density? A. iron B. water C. copper D. aluminum 12