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Physical Science Unit Test Name: __________________________________ Date: _________________________ Directions: Match the words in the word bank with the correct definition. 1. __________________ The three forms that matter usually takes: solid, liquid, and gas. 2. __________________ A single particle of matter made up of two or more atoms joined together. 3. __________________ Anything that has mass and take up space. 4. __________________ The amount of matter in an object. 5. __________________ The smallest particle of matter. 6. __________________ A change in matter that produces new kinds of matter. 7. __________________ A change in the size, shape, or state of matter that does not change it into a new kind of matter. 8. __________________ Material that an electrical charge can move through easily. 9. __________________ A continuous flow of electric charges. 10. ___________________ A strong temporary magnet that uses electricity to produce magnetism. 11. __________________ Material that electric charges do not move through easily. 12. __________________ An object that attracts certain materials, mainly iron. 13. __________________ The two areas on a magnet with the greatest magnetic force. 14. __________________ A circuit that has more than one pathway 15. __________________ An electric charge that builds up on a material like a balloon. 16. __________________ A circuit with one single pathway Directions: Circle the correct answer 17. The molecules in a gas A. are packed close together B. stay close together C. do not stay close together D. form a regular pattern 18. A scientist has a sheet of paper. After an experiment, the paper has turned to ash. The scientist is investigating A. density B. mass and weight C. chemical changes D. physical changes Directions: Answer the following questions. 25. When a puddle of water evaporates, does the water change into a new kind of matter? Why or Why not? __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ Directions: Identify the following changes as chemical or physical. Write a C on the line if the change is chemical. Write a P on the line if the change is physical. 26. _____________ breaking a window 27. _____________ paper burning 28. _____________ rust on a metal cookie sheet 29. _____________ paper being cut into the shape of a snowflake 30. _____________ water evaporating from a puddle 31. _____________ wood burning in a campfire 32. _____________ making blueberry muffins 33. _____________ a melting popsicle 35. _____________ folding a paper into the shape of a bird 36. _____________ an Alka-Seltzer tablet bubbling in a cup of water Directions: Circle the words that correctly completes each sentence. 37. When a cup of warm water is put in the refrigerator energy is (added to) (taken away from) the water. 38. When the sun shines on a parking lot, energy is (added to) (taken away from) the parking lot. 39. When solid iron is melted, energy is (added to) (taken away from) the iron. Directions: Circle the correct answer. 40. What kind of change changes water from liquid to a solid? A. physical change B. chemical change C. particle change D. matter change 41. A bicycle left in the rain rusts. What kind of change is this? A. physical change B. chemical change C. energy change D. change of state 42. A built-up electric charge is called A. electrically neutral B. a like charge C. static electricity D. an unlike charge Directions: Identify the charge on each sample of matter by writing positive, negative or neutral. 43 . ____________ 44. _____________ 45. ______________ Directions: Draw arrows to show whether the two objects in each set will attract or repel. Directions: Circle the correct answer 48. You have a battery and a bulb, What else do you need to make a simple circuit? A. wires B. an insulator C. static electricity D. a source of electric current 49. Which direction does a the needle of a compass always point? A. north B. south C. east D. west 50. What makes an electromagnet different from a bar magnet? A. only an electromagnet attracts materials made of iron B. only an electromagnet can be turned on and off C. only a bar magnet has a magnetic field D. only a bar magnet has poles Directions: Circle the words that correctly completes each sentence. 51. Flipping a switch on (opens) (closes) a circuit. 52. Flipping a switch off (opens) (closes) a circuit. 53. To increase the strength of an electromagnet you can wrap (more) (less) wire around the iron corn. Directions: Use the picture to identify the two different types of circuits by filling in the blank. 54. Circuit A is a __________________ circuit. 55. Circuit B is a __________________ circuit. Directions: List the three parts that every working circuit. 56. ____________________________ 57. ____________________________ 58. ____________________________ Directions for #59-61: Use the word bank to complete the Tree Map. Parts of an Electromagnet 62. Circle the conductors and draw an X on the insulators Directions: Tell whether each set of magnets will attract or repel. Set A 63. Set A will ______________________ . 64. Set B will _______________________ . Set B