Heat Sources

Which gives off both light and heat? 

• Fire
• moonlight
• boiling water
• electric blanket

Jenny leaves her doll outside in the sunlight. She brings it inside, and then she picks it up an hour later. Which of the following is most likely true? 

• The doll cooled down inside
• The doll's temperature got warmer inside
• The doll's temperature stayed the same inside
• The doll began to melt inside

Ross rode fast on his bicycle. When he felt the tires after he stopped, they were warmer than before he started. Why were the tires warmer?

• The tires burned on the road to create heat.
• The tires rubbed on the road to create heat.
• The tires melted into the road to create heat. 
• The tires mixed with the road to create heat.

Which of these is NOT a way to produce heat energy?

• burning
• melting 
• mixing
• rubbing

The pictures show Tonya and Caleb each pushing a box across the carpet. Tonya's box has wheels and Caleb's box does not.
After pushing the boxes across the floor, whose box would most likely feel the warmest on the bottom and why? 

• Tonya's box would be the warmest because the wheels would create more friction.
• Tonya's box would be the warmest because the wheels would create less friction.
• Caleb's box would be the warmest because there would be more friction created without the wheels.
• Caleb's box would be the warmest because there would be less friction created without the wheels. 

Eliza touched a set of train tracks, and they felt cool. After a train passed, she touched the tracks again. Which statement explains how the tracks most likely felt when Eliza touched them again? 

• The tracks were warmer than earlier. 
• The tracks were much colder than earlier
• The trackers were a little cooler than earlier. 
• The tracks were the same temperature as earlier

Which of these did NOT use heat energy?

• cooked food
• warm room
• bouncing ball 
• hot tub

What is the main purpose of a light bulb in a toy oven? 

• light and sound
• electricity and thermal energy
• light and thermal energy
• electricity and sound

Wyatt steps outside and feels the cold air. What is one thing that Wyatt could do to help warm himself? 

• breathe slowly
• sit under the shade of a tree
• stand completely still
• rub his hands together

Which of these things does NOT produce heat energy? 

• campfire
• burning fuel
• ice freezing on a lake
• feet rubbing against carpet