Solved Questions on State of Matter and Change of State
1. Fill in the blanks.
When water condenses, it changes from a _____ to a _____.
a) gas, liquid
b) liquid, gas
c) gas, solid
d) liquid, solid
Answer: a) When water condenses, it changes from a gas to a liquid.
2. Rico wants to show his friends how evaporation happens. Which experiment would be the most suitable for him to demonstrate this process?
a) Freezing water
b) Mixing two different liquids together
c) Leaving a wet towel in the sun and observing changes
d) Watching the ice cubes melt
Answer: c) Sunlight provides heat energy that causes the water in the towel to evaporate, resulting in the towel drying up. By observing this process, Rico can show his friends how water can turn into vapour through evaporation when exposed to heat.
3. Which of the following is an example of a physical change?
a) 
b) 
c) 
d) 
Answer: b) Melting of ice is an example of a physical change. In this process, the solid ice changes into liquid water without any new substances being formed.
4. The images below show the same amount of water poured into different containers. Which property of the water is different in the two images?
a) Mass
b) Volume
c) Temperature
d) Shape
Answer: d) The shape of the water changes as it is poured into different containers. The mass, volume and temperature will remain the same.
5. What happens to the particles of matter when a substance is heated?
a) They move slower
b) They become larger
c) They move faster
d) They arrange in a more orderly manner
Answer: c) When something is heated, the particles inside it become more active and move faster.
FAQs on State of Matter and Change of State
1. What is Matter?
Matter is everything in our environment that has mass and occupies space. It includes solids, liquids, and gases.
2. What are the States of Matter?
Matter is anything in our environment that has mass and occupies space. This includes solid, liquid and gas.
3. What is Freezing?
Freezing is the process in which a liquid turns into a solid when the temperature decreases. Water freezing into ice is a familiar example.
4. What is condensation, and how does it happen?
Condensation is the transformation of a gas into a liquid. It happens when a petrol cools. One example is dew gathering on grass in the morning.
5. Is it possible to change the state of matter?
Yes, simple experiments can modify the condition of matter. For example, freezing water to form ice or boiling water to make steam.
