Matter and Material Quiz

Find the odd one out based on how heat changes state.

1. Melting
2. Boiling
3. Condensation
4. Evaporation

Answer: (c) Condensation

Which of the following behaves differently from the others when left in an open container at room temperature?

1. Juice in a glass
2. Milk in a bottle
3. Oil in a bowl
4. Ice cream on a plate

Answer: (d) Ice cream on a plate

Read the riddle and answer the following: I’m invisible but not gone, From puddles I rise at dawn. Sun helps me move, I don’t shout— From liquid to gas, I sneak out. What am I?

1. Boiling
2. Condensation
3. Evaporation
4. Melting

Answer: (c) Evaporation

A teacher gave a mixture of tiny stones, salt, and water to students. Which sequence of methods would BEST help separate all the components?

1. Evaporation → Decantation → Sedimentation
2. Decantation → Filtration → Evaporation
3. Filtration → Sedimentation → Decantation
4. Sedimentation → Decantation → Evaporation

Answer: (b) Decantation → Filtration → Evaporation

Why can’t we separate ink mixed in water using sedimentation?

1. Ink floats on water
2. Ink is heavier than water
3. Ink dissolves in water
4. Ink settles quickly

Answer: (c) Ink dissolves in water

Read the statements carefully: 1. Metal wires without covers are safe to touch. 2. Plastic or rubber coating stops electric shocks. 3. Cotton-covered wires with water are dangerous. 4. Paper covered with foil is a good insulator. Which statements are TRUE?

1. 2 and 3 only
2. 1 and 2 only
3. 1, 3 and 4 only
4. All are true

Answer: (a) 2 and 3 only

Consider this scenario: A piece of metal expands when heated and contracts when cooled. Which of the following explains why the metal behaves this way?

1. The particles of metal become bigger when heated and shrink when cooled.
2. The metal absorbs more light when heated, causing it to expand.
3. The metal particles are always moving at the same speed, regardless of temperature.
4. The particles of metal move closer together when heated and farther apart when cooled.

Answer: (d) The particles of metal move closer together when heated and farther apart when cooled.

Look at the pattern given below and identify 'X' correctly.

1. New substance formed
2. No heat released
3. Soluble in water
4. Shape change only

Answer: (a) New substance formed

Which of the following shows a misconception about evaporation?

1. It is a process where liquid turns into gas
2. It happens only at boiling temperature
3. It happens faster in sunlight
4. Wind increases the rate of evaporation

Answer: (b) It happens only at boiling temperature

Which scenario shows that matter changes state but is NOT destroyed?

1. Water boiling into steam and disappearing
2. A balloon popping and vanishing
3. Wood burning into ash
4. A nail rusting

Answer: (a) Water boiling into steam and disappearing