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States of Matter Exploration
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States of Matter Exploration
📚 Part 1: Multiple Choice
1. Which state of matter has a fixed shape and fixed volume?
Solid
Liquid
Gas
Plasma
2. Which change of state is called sublimation?
Solid → Gas
Gas → Solid
Liquid → Gas
Solid → Liquid
3. Dry ice (solid carbon dioxide) is often seen turning directly into gas at about −78.5 °C. Which statement is correct?
It sublimes (solid → gas) at about −78.5 °C under atmospheric pressure
It melts (solid → liquid) at −78.5 °C
It boils (liquid → gas) at −78.5 °C
It deposits (gas → solid) at −78.5 °C
4. Which sentence about particle energy and states is true?
As energy increases, particles move faster and matter tends to change from solid → liquid → gas
As energy decreases, particles move faster and matter tends to change from gas → liquid → solid
Solids always have more particle movement than gases
Liquids have fixed particle positions like solids
✏️ Part 2: Short Answers & Diagrams
5. In one or two sentences explain why a gas fills the whole volume of its container.
6. Draw simple particle diagrams for a solid, a liquid and a gas. Label each drawing and show relative spacing and movement.
7. Define sublimation and deposition in your own words and give one real example of each (one-line each):
• Sublimation (example) ___________
• Deposition (example) ___________
8. A block of ice at −10 °C is warmed to 20 °C. At what temperatures does the ice melt and boil? List the state changes that happen as temperature increases.
🔬 Part 3: Matching & Practical Thinking
9. Match each process (left) with the correct description (right). Draw lines or write the matching letter/number.
A. Melting
B. Freezing
C. Sublimation
D. Deposition
1. Gas → Solid (e.g. frost forming)
2. Solid → Liquid (e.g. butter in a pan)
3. Liquid → Solid (e.g. water to ice)
4. Solid → Gas (e.g. dry ice turning to CO₂ gas)
10. Design a simple safe experiment to show sublimation at school or home. List materials, steps and what you expect to observe.
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