Light and Heat Practice SR Questions

1. Light and Heat Practice SR Questions

2. 1.Light travels continuously until it hits an object. In what path does light travel? a. straight line b. bent line c. curved line d. spiral line

3. 2. When light hits an object, it is sometimes absorbed by that object. What is the process that describes when light bounces off an object? a. refraction b. rotation c. reflection d. diffraction

4. 3. Which of these is the best example of reflection? • Light bounces off a cat’s fur. • Air causes light to slow down. • Light passes through a clear plastic bottle. • A rock absorbs light and becomes warm.

5. 4. Which material would reflect the least light? • coin • mirror • metal spoon • plastic spoon

6. 5. When light hits a shiny object it • is absorbed the object • is refracted by the object • is reflected by the object • is unchanged by the object

7. 6. Gary is looking at himself in a plane mirror. He raises his left hand and then walks toward the mirror. What will his reflection do? • Raise its right hand and walk toward Gary • Raise its right hand and step back from Gary • Raise its left hand and walk toward Gary • Raise its left hand and step back from Gary

8. 7. Light bounces off a mirror. Which of the following illustrations best shows the direction light will travel after hitting a plane mirror? a. c. b. d.

9. 8. The students placed the toy truck 20 centimeters in front of the mirror. • The image of the truck will appear to be • 0 centimeters from the mirror • 10 centimeters in front of the mirror • 20 centimeters behind the mirror • 40 centimeters behind the mirror

10. 9.When light passes through a prism it is an example of • Reflection • b. Refraction • c. Absorption • d. Filtering

11. 10. In liquids and gases, thermal or heat energy can be transferred through • Contact • Convection • Radiation • discharge

12. 11. Many pots and pans are made of metal because metal is a good_____ • conductor. • insulator. • heat source. • radiator.

13. 12. The transfer of heat through spaces is called ___________ • conduction. • convection. • radiation. • insulation.

14. 13. Which is an example of transfer by conduction? • An ice cube melting in your hand • water in a beaker over a flame • a furnace heating the air in your house • the sun heating water in a swimming pool.

15. 14. Some materials conduct heat more readily than others. If your mother packed you hot chicken noodle soup for lunch, comparing the items below, which material would keep your soup the hottest? • a. plastic bowl • b. glass jar • c. metal mug • d. foam cup

16. 15. Have you ever known of someone to burn herself/himself while cooking on the stove? If you let your spoon sit in a hot pot, you could burn yourself when you touch it. Some materials are a better conductors of heat and others are a better insulators based on how easily heat flows through them. What would be the best insulator for your spoon so you don’t get burned? a. wood b. silver c. plastic d. stainless steel

17. Get Ready for the Answers

18. A • C • A • D • C • A • C • C • B • B • A • C 13. A 14. C 15. C