Sources of Heat
1. Jonah’s feet felt cold at the park. What could he do to warm them up?
A. Sit down quietly.
B. Wiggle his toes quickly.
C. Take off his shoes.
D. Stand on the shady grass.
B. Wiggle his toes to create friction
When is the first day of Fall for the year 2025?
September 22, 2025
3. Sofia left a chocolate bar outside. It melted because the Sun gives off light and:
A. electricity.
B. sound.
C. heat.
D. magnetism.
C. Heat
A class built a solar oven from a box. To trap the most heat, what color should the inside of the box be?
A. white
B. black
C. yellow
D. silver
B. Black
2. A student rubbed two smooth stones together. What happened to the stones?
A. They became cooler because air passed between them.
B. They became cooler because sunlight reflected off them.
C. They stayed the same temperature because they were heavy.
D. They became warmer because friction created heat.
D. They became warmer because friction created heat.
What happens during the fall equinox?
Day and night are nearly equal in length across the Earth.
Emma brought a large hat to wear on a sunny day at the beach. Why did she bring it?
A. To stay dry from rain.
B. To block some heat energy from the Sun.
C. To get hotter under the Sun.
D. To keep the sand warm.
B. To block some heat energy from the Sun.
Which color would be best for a car if the driver wants it to stay cooler in the summer?
A. dark green
B. pale blue
C. black
D. red
B. Pale Blue
1. When Ana rubs her hands together quickly, they feel warm. Explain why this happens.
Rubbing her hands together causes friction, which warms Ana's hands.
In the Southern Hemisphere, what does September 22nd mark?
If Maya left an ice pop on the playground bench during recess, what would happen after 30 minutes?
A. It would melt.
B. It would refreeze.
C. It would get larger.
D. It would stay frozen.
A. It would melt.
Leo placed one red T-shirt and one white T-shirt in the sun. After an hour, what most likely happened?
A. Both shirts were the same temperature.
B.The white shirt was warmer.
C. The red shirt was warmer.
D. The white shirt was much hotter than the red shirt.
C. The red shirt was warmer.
2. David rubbed two sticks together and noticed smoke after a while. What caused the sticks to heat up enough for smoke to appear?
Because David rubbed two sticks together, friction caused the sticks to become warmer. Due to this increase in heat, the sticks were beginning to catch fire.
True or False:
The Fall Equinox happens on the same day every year.
False:
Although the autumnal equinox is generally Sept. 22 or 23, occasionally it falls on Sept. 21 or 24.
A group of students put a cup of water in sunlight for ten minutes. What happened?
A. The water was cooler.
B. The water stayed the same.
C. The water got warmer.
D. The water disappeared instantly.
C. The water got warmer.
A solar cooker works better when painted black instead of white. Explain why the color black helps the cooker collect more heat.
Because the color black absorbs more of the heat of the sun than a lighter color.
Marcus rubbed a metal spoon with a towel, then rubbed it with steel wool. Which made the spoon warmer and why?
A. The towel, because it traps sunlight.
B. The towel, because it bends and makes more chemical energy.
C. The steel wool, because it is rougher and makes more friction.
D. The steel wool, because it is darker and absorbs sunlight.
C. The steel wool, because it is rougher and makes more friction.
What begins to be visible in the night sky after the fall equinox?
A. Mars
B. Stars
C. The aurora borealis or the Northern Lights
C. The aurora borealis or the Northern Lights
Nora sat under a large umbrella at the beach. She felt cooler than her friends sitting in the open sun. Explain how the umbrella helped reduce the heat reaching her.
The shade blocked the sun, and this reduced the temperature. Sitting under the shade of the umbrella, Nora was not exposed to the heat of the Sun's rays.
Houses in hot, sunny areas are often painted white or pale colors. Could you explain why this helps keep the houses cooler?
Houses that are painted lighter colors do not absorb as much heat as a house that is painted a darker color.