Thermal Energy at School
Start Here
This is a paper investigation. You will read a short passage, study a diagram and a data table, and answer questions using a pencil. You do not need a computer, a calculator, or any lab materials. Work by yourself and do your best thinking. Write in complete sentences where you are asked to explain. If a question is hard, skip it, keep going, and come back. Reading the passage aloud quietly to yourself is allowed and encouraged.
Start Notice & Wonder 5 min
Think about ordinary warming and cooling you feel during a normal school day.
1You touch a metal locker handle and a wooden pencil that have been sitting in the same room all morning. The metal feels colder even though a thermometer says they are the same temperature. Write one thing you notice and one thing you wonder about this.
2Name two places at school where something obviously gets warmer or cooler during the day (for example, a spot by a window). For each one, say whether it warms up or cools down.
Build Read the Science 5–10 min
How thermal energy moves
Thermal energy is the energy of the tiny moving particles inside matter. When particles move faster, the material is warmer; when they move slower, it is cooler. So temperature is a measure of the average kinetic energy (motion energy) of the particles. Heating something makes its particles jiggle and move faster.
Thermal energy always moves from warmer to cooler until both reach the same temperature. That balanced, no-change state is called thermal equilibrium. There are three ways the energy travels:
- Conduction — energy passes through direct contact, particle to particle. A metal spoon warming in hot soup is conduction. Metals conduct quickly; wood and plastic conduct slowly, which is why they feel warmer to the touch.
- Convection — energy is carried by a moving fluid (a liquid or a gas). Warm air is less dense, so it rises; cooler air sinks to take its place, making a loop called a convection current.
- Radiation — energy travels as invisible rays that can cross empty space, needing no particles at all. Sunlight warming a desk is radiation.
Remember: nothing "cold" ever flows in. Something feels cold because thermal energy is flowing out of your hand into it.
Word Bank
- thermal energy
- the total energy of the moving particles in matter.
- conduction
- transfer of thermal energy through direct contact.
- convection
- transfer of thermal energy by a moving liquid or gas.
- radiation
- transfer of thermal energy as rays that can cross empty space.
- thermal equilibrium
- when two things reach the same temperature and energy stops flowing net.
3In the diagram, which transfer mode does not need any particles to travel? Name it and give the one example shown for it.
Apply Use the Data 20–25 min
A science club measured the temperature of surfaces and air around the building at the same time on a sunny afternoon. Study Table 1, then answer.
| Location / material | Temperature (°C) | In sun or shade? |
|---|---|---|
| Metal handrail (outside stairs) | 48 | Sun |
| Sunlit concrete sidewalk | 44 | Sun |
| Shaded concrete sidewalk | 29 | Shade |
| Wooden bench (outside) | 34 | Sun |
| Classroom air (near window) | 27 | Indoors |
| Classroom air (far corner) | 24 | Indoors |
4Observation vs. inference. Read each statement. Write O if it is an observation (something directly measured or seen) or I if it is an inference (a conclusion you reason out).
____ a) The metal handrail was 48 °C.
____ b) The handrail felt too hot to grip because the sun heated it by radiation.
____ c) The far corner of the room was 24 °C.
____ d) The far corner is cooler because it is farther from the sunny window.
5Look at the two concrete readings. The same material is 44 °C in the sun and 29 °C in the shade. In one sentence, explain what caused the difference using a transfer mode from the Word Bank.
6Classify the transfer. For the scenario below, choose the ONE mode that best fits.
6a. A student sets a cold soda can on the sunny metal handrail; the can warms where it touches the metal.
- Conduction
- Convection
- Radiation
6b. A ceiling fan pushes warm air near the ceiling back down across the room.
- Conduction
- Convection
- Radiation
6c. Sunlight streams through the window and warms a dark backpack on the floor.
- Conduction
- Convection
- Radiation
7Redesign reasoning (multi-step). The classroom by the window gets uncomfortably hot on sunny afternoons. Using Table 1 and the diagram, choose ONE change from the list below and explain, in 2–3 sentences, how it reduces unwanted heat transfer and which mode it targets. Options: (i) light-colored blinds on the window, (ii) a fan to keep air moving, (iii) moving desks to the far corner.
Explain Claim–Evidence–Reasoning 5–10 min
Question 8. Which design choice would most reduce heat transfer into a hot classroom? Write a claim and support it with two pieces of evidence from Table 1 or the diagram, then explain your reasoning.
Sentence stems you may use: "The best choice is… because…" · "One piece of evidence is… (from Table 1 / the diagram)." · "A second piece of evidence is…" · "This works because thermal energy moves by… and…"
Close ACE Wrap-Up 5 min
Explain one transfer mode (conduction, convection, or radiation) in your own words, as if teaching a friend.
Point to one row of Table 1 or one part of the diagram that shows that mode. Name it.
Give a new example of that mode from somewhere outside of school.
Continue Early Finisher optional · ~15 min
Design a "cool bench." On the back of this page, sketch an outdoor bench that stays cooler in the sun than the 34 °C wooden bench in Table 1. Label at least two features and, for each, name the transfer mode it fights (conduction, convection, or radiation). Then predict a temperature for your bench and explain why it would be lower.