Year 8 Science · Unit 3 · Lesson 6
Foundation Worksheet
Learning Goals
Match each term to its description
Draw a line connecting each state change on the left to its correct description on the right. Or write the matching letter next to each term.
| State change | Your answer | Description |
|---|---|---|
| Melting | A. Gas → liquid; releases energy to surroundings (exothermic) | |
| Freezing | B. Liquid → solid; releases energy to surroundings (exothermic) | |
| Boiling | C. Solid → gas directly; absorbs energy from surroundings (endothermic) | |
| Evaporation | D. Solid → liquid; absorbs energy from surroundings (endothermic) | |
| Condensation | E. Liquid → gas throughout the liquid at its boiling point; endothermic | |
| Sublimation | F. Liquid → gas at any temperature from the surface only; endothermic |
True or False? Fix the false ones
Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.
Freezing releases energy to the surroundings.
Correct it:
The boiling point of water is always exactly 100°C, no matter where you are on Earth.
Correct it:
Melting requires energy input from the surroundings — it is an endothermic process.
Correct it:
On a heating curve, the temperature keeps rising steadily right through the melting point.
Correct it:
1. Explain why the temperature of pure ice stays at 0°C while it is melting, even though heat is being added continuously.
2. A student is confused: "If condensation releases energy, why does a cold glass feel wet and not warm?" Explain using the idea of energy transfer.
Wrap Up
In one sentence, what was the main idea of this lesson?