Unit 4 Review

1. Unit 4 Review DePersio’s Discovery Lab

2. Unit 4 Review A solution is formed when one substance is dissolved in another. Mae has a solution in which water is the solvent. Which of these could be the solute? D Sugar A Oil B Pebbles C Sand D Sugar

3. Unit 4 Review Jose has 5g of salt and 10mL of water. He pours the water into a beaker and then adds the salt and watches it dissolve. Which word best describes the water? A Mixture B Solute C Solution D Solvent B Solute

4. Unit 4 Review Emily made flow charts to show the changes in states of water. In each, she listed the original state, the process that results in a change in state, and the resulting state. Which of these correctly describes a change in state of water? B Liquid water ® boils ® water vapor A Liquid water ® melts ® solid water B Liquid water ® boils ® water vapor C Solid water ® condenses ® liquid water D Water vapor ® evaporates ® liquid water

5. Unit 4 Review There are three main states of matter: liquid, solid, and gas. Which statement describes the shape of a solid? A It has its own shape. A It has its own shape. B Itdoes not have shape. C It takes the shape of its container. D It changes shape with temperature.

6. Unit 4 Review There are different characteristics for each of the states of matter. Which statement describes a difference between liquids and solids? A Temperature can change a solid to a liquid, but it cannot change a liquid to a solid B Solids have a definite volume and liquids do not have a definite volume C The particles in a solid are much closer together than the particles in a liquid D Solids take on the shape of their containers and liquids maintain their own shapes C The particles in a solid are much closer together than the particles in a liquid

7. Unit 4 Review Jakob studied drawings of the particles in the same substance. The drawings show the substance in different states and temperatures. Which drawing most likely shows the substance at the highest temperature? A A B C

8. Unit 4 Review Soryana’s teacher gave her a test tube of liquid. Which tool should Soryana use to measure the volume of the liquid? A Balance B Graduated Cylinder C Test Tube D None of the above C Test Tube

9. Unit 4 Review Water can be a liquid, solid, or gas. The pictures show how it changes from each state of matter. What process takes place when matter changes from state 1 to state 3? A Boiling B Condensing C Freezing D Melting B Condensing

10. Unit 4 Review Soryana’s teacher gave her a test tube of liquid. Which tool should Soryana use to measure the volume of the liquid? A Divide the volume by the mass B Divide the mass by the volume C Multiply the volume by the mass D Add the mass and volume and divide by 2 B Divide the mass by the volume

11. Unit 4 Review The table gives the mass and volume of four unknown solids. Which is the correct explanation of how to find the density? A Divide the volume by the mass B Divide the mass by the volume C Multiply the volume by the mass D Add the mass and volume and divide by 2 B Divide the mass by the volume

12. Unit 4 Review Matter may be a gas, solid, or liquid. It can change from one state to another. Which change most often causes matter to change state? A Change in mass B Change in C Change in volume D Change in temperature D Change in temperature

13. Unit 4 Review Each of the states of matter has specific characteristics. Which statement correctly describes one of these characteristics? A Solids flow from one place to another. B Gases can expand and be compressed. C Liquids have definite volume and shape. D The particles in solids have weak forces of attraction. B Gases can expand and be compressed.

14. Unit 4 Review Randall experimented with an unknown liquid. The table shows what happened when he changed the temperature of the liquid. Which statement is supported by Randall’s experiments? A The substance boils at 85 °C. A The substance boils at 85 °C. B The substance freezes at 25 °C. C The substance condenses at –10 °C. D The substance changes state at –10 °C.

15. Unit 4 Review Riley and Jill are studying what happens to matter when it changes state. They found this list of statements. Which of these statements is true? A When matter changes state, new matter may be created. B When matter changes state, it is still the same type of matter. C When matter changes state, its boiling point might also change. D When matter changes state, the space between particles in the matter stays the same. B When matter changes state, it is still the same type of matter.

16. Unit 4 Review Lina needs to make a list of the physical properties of matter. Which of these should Lina include in her list? A Balance B Graduated cylinder C Temperature D Thermometer C Temperature

17. Unit 4 Review Each state of matter has certain physical properties. Which is a physical property of a gas? A It has definite shape. B It can be compressed. C It has definite texture. D Its particles vibrate in place. C It has definite texture.

18. Unit 4 Review During an experiment, Carlos heated a beaker of water over a hot plate burner. After a period of time, the beaker was empty. Which statement describes what happened? A The water froze. B The water melted. C The water condensed. D The water evaporated. D The water evaporated

19. Unit 4 Review Helen is studying the properties of solids. She is comparing the wooden cube and the steel cube shown in the picture below. Which property is the same for the two cubes? A Color B Luster C Texture D Volume D Volume

20. Unit 4 Review At what temperatures is water a gas? A Below 0 °C B Above 100 °C C Between 0 °C and 100 °C D Between 0 °C and 120 °C B Above 100 °C

21. Unit 4 Review The table shows the melting points and boiling points for different substances. Suppose these substances were placed in a freezer set to –50 °C. Which substance would become a liquid? A Chlorine B Mercury C Oxygen D Tungsten B Mercury

22. Unit 4 Review Wilson made a list of activities that involve a chemical change. Which of these changes should be included on his list? A Ringing a bell B Making ice cubes C Picking up rocks D Making pancakes B Making ice cubes

23. Unit 4 Review Jo made a table of chemical changes and physical changes. Which is in the wrong column? A Sharpening a pencil B Baking a loaf of bread C Pouring milk into a glass D Crumpling aluminum foil into a ball D Crumpling aluminum foil into a ball

24. Unit 4 Review A B C D Which of the following represents a physical change? C

25. Unit 4 Review Ava performed an investigation. Then, Matthew repeated the same investigation. What is the best reason for Matthew to repeat it? A To write the same report B To practice the experiment C To come to the same conclusion D To be sure the observations are accurate D To be sure the observations are accurate

26. Unit 4 Review Taylor put the same amounts of water, sugar, and yeast into three balloons. Then she put each one in a place with a different temperature and observed the changes. If someone wanted to replicate Taylor’s experiment, what other information would they need? A The mass of each balloon and what was in it B The temperature where each balloon was placed C The size of the table where each balloon was placed D The total mass of all the balloons and what was in them B The temperature where each balloon was placed

27. Unit 4 Review Andrea created a solution by adding food coloring to water. Her solution is also a mixture. Which of these is true of all solutions? A They are all liquids B They all include water C The parts of all solutions are evenly mixed D The substances are always permanently combined C The parts of all solutions are evenly mixed

28. Unit 4 Review Heidi combined lettuce, tomatoes, cucumbers, and shredded cheese to make a salad. Which best describes what Heidi made? A Combination B Element C Mixture D Solution C Mixture

29. Unit 4 Review A company collects cans for recycling. Some cans are made of aluminum, and others are made of steel. Which of the following is the best way to separate the mixture of the two types of cans? A By size B By shape C By magnetism D By evaporation C By magnetism

30. Unit 4 Review Destiny is making a nutrient solution to use in her garden. She places the powder in a watering can. Then she adds the water. Which would dissolve the powder fastest? A Shaking the can vigorously B Stirring the solution slowly C Tilting the can carefully from side to side D Setting the can down and leaving it alone A Shaking the can vigorously

31. Unit 4 Review Atoms are made up of smaller particles called subatomic particles. Which is a subatomic particle that has no charge? A Electron B Neutron C Nucleus D Proton B Neutron

32. Unit 4 Review Jacob put yeast into a bowl of water and added a little sugar. He put the bowl in a warm place. After a while, Jacob observed foam spilling out of the bowl. What kind of change is occurring? A Physical change B Chemical change C Scientific change D Geological change B Chemical change

33. Unit 4 Review Which of these conditions has the greatest effect on how quickly a substance changes from one state to another? A Color B Light C Share D Temperature D Temperature

34. Unit 4 Review Why does milk have to be kept in a refrigerator? A Milk tastes better when it is cold B The reactions that cause milk to spoil are slower at lower temperatures C Physical changes that cause milk to spoil are slower at lower temperatures D No chemical or physical changes can occur at cool temperatures B The reactions that cause milk to spoil are slower at lower temperatures

35. Unit 4 Review Felix is helping his father cook dinner. After Felix adds salt to the boiling water, what will he have in the pot? A A mixture call a solution B A solution called a mixture C A mixture called a combination D A solution called a combination A A mixture call a solution

36. Unit 4 Review Tania's mom boils water in a pot on the stove to make soup. Which of these ingredients will dissolve in the water? A Garlic B Oil C Pepper D Salt D Salt

37. Unit 4 Review Each state of matter has certain physical properties. Which is a physical property of a gas? A It has definite shape B It can be compressed C It has definite texture D Its particles vibrate in place B It can be compressed

38. Unit 4 Review Different elements have different kinds of atoms. How can you tell an atom of one element from an atom of another? A The number of electrons B The number of neutrons C The number of nuclei D The number of protons D The number of protons

39. Unit 4 Review The change in matter in which chemical bonds are broken, rearranged, and reformed is called a _____. A Chemical formula B Chemical reaction C Chemical equation D Chemical compound B Chemical reaction

40. Unit 4 Review The metric system is a system of measurement used in science and throughout the world to measure matter. A True B False A True

41. Unit 4 Review In which three forms can matter be found? A Loud, Soft, Low B Hot, Warm, Cold C Solid, Liquid, Gas D Hard, Soft, Rough C Solid, Liquid, Gas

42. Unit 4 Review What is a measurement of the energy or heat in matter? A Size B Weight C Density D Temperature D Temperature

43. Unit 4 Review Which is the BEST example of a physical change in matter? A Firecracker exploding B Log burning C An ice cube melting D A flashlight turning on C An ice cube melting

44. Unit 4 Review In a solution, the particles of different substances are _____ . A Never mixed B Mixed evenly C Mixed unevenly D Separated from each other B Mixed evenly

45. Unit 4 Review When you shake a mixture of sand and water, you have made a(n) _____. A Soap B Colloid C Emulsion D Suspension D Suspension

46. Unit 4 Review Which of the following is NOT a mixture? A Table salt B Lemonade C Garden soil D Salad dressing A Table salt

47. Unit 4 Review What is volume? A The amount of space something takes up B The amount of mass in something C The amount of weight in an object D The amount of gravity pulling on an object A The amount of space something takes up

48. Unit 4 Review When a substance changes phase, the chemical structure of its molecules does not change. A True B False A True