Heat

A student has a chocolate bar in a jacket pocket. The jacket is hanging on the hook. When the student went to eat the chocolate for snack, it melted. Which question would help determine the source of heat that caused the chocolate bar to melt?

• What is the temperature of the room?

• How many students are in the room?

• Is the coat very thick?

What tool do we use to measure temperature change?

• a compass

• a temperature

• a thermometer

I went to a friend’s house for a sleepover. My friend’s mom gave each of us an ice cream cone to eat outside. The ice cream began to melt quicker than we could eat it. What is the best question we can ask to find the source of heat that caused the ice cream to melt?

• What was the temperature of the ice cream cones?

• What was the temperature outside?

• What kind of ice cream cones were they?

Certain structures on the playground outside get hotter because they are good conductors of heat. Which of these items would get the hottest on the playground?

• A wooden bench

• A plastic slide

• a metal slide

A solar cooker is a device that can be used to cook food outside using heat from the sun when electricity is not available. Joe wants to build a solar cooker. Below is a table showing the choices of materials he can choose for his solar cooker. Which choice should he make and why?

• Choice #1 is the best conductor so he should use that.

• Choice #1 is the best insulator so he should use that.

• Choice #2 is the best conductor so he should use that.

• Choice #2 is the best insulator so he should use that.

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 rubbed on the road to create heat.

• The tires melted into the road to create heat

• The tires burned on the road to create heat.

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

• sit under the shade of a tree

• breathe slowly

• rub his hands together

Students at your school have been burning their hands on the monkey bars. Which would be the best investigation for determining the material that should be used to make the monkey bars safe for students’ hands?

• Measure the temperature of the material that the monkey bars are made of while the bars are in the shade and then in the sun. Compare the temperatures to see which is the lowest.

• Measure the temperature of the material on the ground under the monkey bars and compare it to the temperature of the monkey bars during the hottest part of the day.

• Measure the temperature of different materials on other playground equipment after the materials have been in the sun for several minutes. Compare to see which has the lowest temperature.

Ms. Parker wants to test if sunlight has an impact the temperature of her black jackets. She places three black jackets and records their temperatures after 30 minutes. What can she conclude based on the results in the chart?

• The black jacket temperature increases just as much in the shade as it does in the direct sunlight.

• Direct sunlight increases the temperature of the black jacket more than sitting in the shade and the classroom.

• The temperature of the black jacket decreases in the classroom, shade, and the direct sunlight.

A football team is selling lemonade on a hot summer day. The kids on the team begin to notice that the lemonade becomes warm pretty quickly. One of the kids wants to determine the best location to keep the lemonade as cool as possible. Based upon the football player’s investigation, what can the student conclude?

• The lemonade warms up the quickest in the shade, so the lemonade should stay out of direct sunlight. If the lemonade can sit in the shade, then the lemonade will be the coolest.

• The temperature of the lemonade will remain cool whether it is in direct sunlight, the shade, or in the air conditioned car.

• The lemonade warms up the quickest in the direct sunlight, so the lemonade should stay out of direct sunlight. If the lemonade can sit in the back of the air conditioned car, then the lemonade will be the coolest.