To solve the problem, we need to understand the phase changes of water and match them with the appropriate terms from the given list. Let's break it down step by step:
Key Terms and Their Meanings:
1.
Evaporates: Water turns into water vapor (gas) when heated.
2.
Condenses: Water vapor turns back into liquid water when cooled.
3.
Melts: Ice (solid) turns into liquid water when heated.
4.
Freezes: Liquid water turns into ice (solid) when cooled.
Temperature References:
-
0°C: The freezing/melting point of water.
-
100°C: The boiling point of water (where water evaporates).
Completing the Sentences:
#### 1. If you ________ water to a temperature of ______, it ________ to form water vapour.
-
Action: To turn water into water vapor, you need to heat it.
-
Temperature: Water boils at 100°C, so heating it to this temperature will cause evaporation.
-
Result: Evaporation occurs.
Completed Sentence:
If you
heat water to a temperature of
100°C, it
evaporates to form water vapour.
#### 2. If you ________ water vapour to a temperature of ______, it ________ to form water.
-
Action: To turn water vapor back into liquid water, you need to cool it.
-
Temperature: Water vapor condenses below 100°C, typically around room temperature or lower.
-
Result: Condensation occurs.
Completed Sentence:
If you
cool water vapour to a temperature of
below 100°C, it
condenses to form water.
#### 3. If you ________ ice to a temperature of ______, it ________ to form water.
-
Action: To turn ice into liquid water, you need to heat it.
-
Temperature: Ice melts at 0°C.
-
Result: Melting occurs.
Completed Sentence:
If you
heat ice to a temperature of
0°C, it
melts to form water.
#### 4. If you ________ water to a temperature of ______, it ________ to form ice.
-
Action: To turn liquid water into ice, you need to cool it.
-
Temperature: Water freezes at 0°C.
-
Result: Freezing occurs.
Completed Sentence:
If you
cool water to a temperature of
0°C, it
freezes to form ice.
Final Answer:
\[
\boxed{
\begin{array}{l}
\text{If you } \mathbf{heat} \text{ water to a temperature of } \mathbf{100°C}, \text{ it } \mathbf{evaporates} \text{ to form water vapour.} \\
\text{If you } \mathbf{cool} \text{ water vapour to a temperature of } \mathbf{below 100°C}, \text{ it } \mathbf{condenses} \text{ to form water.} \\
\text{If you } \mathbf{heat} \text{ ice to a temperature of } \mathbf{0°C}, \text{ it } \mathbf{melts} \text{ to form water.} \\
\text{If you } \mathbf{cool} \text{ water to a temperature of } \mathbf{0°C}, \text{ it } \mathbf{freezes} \text{ to form ice.}
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of changing states of water worksheet.
