Activity 3: Complete the crossword puzzle below by identifying the term being described by the clues given. K Condensation L h V e r m Across: 2. the SI unit of heat 4 gas state to liquid is called 6. from liquids to solids is called solidification or _ 8. substance that has a boiling point 0C n m Joule m e te 7 Down: 1. a device used to measure temperature 3. expands the greatest when heated to the same temperature 5 temperature scale that William Thompson introduced Freezing 7 produced when molecules continue to vibrate water 9. solid to liquid state is called Fusion Activity 3: Complete the crossword puzzle below by identifying the term being described by the clues given. K Condensation L h V e r m Across: 2. the SI unit of heat 4 gas state to liquid is called 6. from liquids to solids is called solidification or _ 8. substance that has a boiling point 0C n m Joule m e te 7 Down: 1. a device used to measure temperature 3. expands the greatest when heated to the same temperature 5 temperature scale that William Thompson introduced Freezing 7 produced when molecules continue to vibrate water 9. solid to liquid state is called Fusion
The Correct Answer and Explanation is:
Here’s the completed crossword puzzle with the correct answers:
Across:
- Joule – The SI unit of heat.
- Condensation – The change of state from gas to liquid.
- Freezing – The process of changing from liquid to solid.
- Water – A substance that has a boiling point of 0°C (Note: This seems to refer to water’s freezing point being 0°C, but the clue may be inaccurately worded).
Down:
- Thermometer – A device used to measure temperature.
- Gas – The state of matter that expands the most when heated.
- Kelvin – The temperature scale introduced by William Thomson (Lord Kelvin).
- Heat – Produced when molecules vibrate faster.
- Fusion – The change from solid to liquid state (another term for melting).
Explanation
This crossword puzzle focuses on fundamental concepts of heat, temperature, and phase changes in matter. The SI unit of heat is the Joule, named after James Prescott Joule. It’s the standard unit for measuring energy, including thermal energy.
Condensation is the transition from a gaseous to a liquid state, commonly observed when water vapor turns into dew. Conversely, freezing or solidification is when a liquid becomes solid, such as water turning into ice.
The puzzle includes water, which freezes at 0°C. While the clue says “boiling point 0°C,” that may be an error—the freezing point of water is 0°C, and the boiling point is 100°C.
To measure temperature, a thermometer is used. The Kelvin scale, developed by William Thomson (Lord Kelvin), starts at absolute zero and is used primarily in scientific contexts.
Among states of matter, gases expand the most when heated due to the high energy and freedom of movement of gas particles. Heat is not a substance but a form of energy that results from the motion of molecules; as they vibrate more rapidly, the substance’s temperature increases.
Finally, fusion (or melting) is the process where a solid changes into a liquid, as in ice melting into water. These transitions between states of matter are governed by the input or removal of heat, reflecting energy conservation and thermodynamic principles.
