Heat and Temperature quiz

More questions about Heat and Temperature

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   Where does the warmth under a duvet come from?

   Answer: Your body

   Why: Wrap a coat around a snowman and it melts more slowly, because insulation slows heat flow in either direction.

2. 2 Medium

   How do home radiators give off most of their heat?

   Answer: Convection

   Why: Air warmed by the radiator rises and cooler air flows in below it, so a slow loop carries heat around the room.

3. 3 Hard

   By how much could the heat that melts ice warm the meltwater?

   Answer: About 80 °C

   Why: That's why ice at 0 °C chills a drink far more than the same weight of 0 °C water: melting soaks up heat first.

4. 4 Easy

   What color are the hottest stars?

   Answer: Blue

   Why: Red is actually the cool end: red stars sit around 3,000 K, about half the Sun's surface temperature of 5,800 K.

5. 5 Medium

   What did 0 degrees mark on Celsius's original 1742 scale?

   Answer: Water's boiling point

   Why: On that first version water froze at 100, so a higher reading meant colder, not hotter.

6. 6 Hard

   Why does steam at 100 °C scald worse than water at 100 °C?

   Answer: Latent heat

   Why: Condensing steam releases about 2,260 joules per gram, over five times what it takes to heat that water from 0 °C to 100 °C.