States of Matter Quiz for Year 8

What is the process called when a solid changes directly into a gas without becoming a liquid first?

• Evaporation

• Condensation

• Sublimation

• Melting

Which of the following best describes the movement of particles in a solid?

• Particles move freely and are far apart

• Particles vibrate in fixed positions

• Particles slide past each other

• Particles move randomly at high speeds

What is the main difference between boiling and evaporation?

• Boiling occurs at any temperature, while evaporation occurs at a specific temperature

• Boiling occurs throughout the liquid, while evaporation occurs only at the surface

• Boiling is a slow process, while evaporation is a rapid process

• Boiling does not require heat, while evaporation does

A substance has a melting point of 0°C and a boiling point of 100°C. What state will it be in at 50°C?

• Solid

• Liquid

• Gas

Which of the following best describes the structure of a gas?

• Particles are tightly packed in a regular pattern

• Particles are close together but can move past each other

• Particles are far apart and move freely

• Particles are arranged in layers

What happens to the particles of a liquid as it freezes into a solid?

• They move faster and spread apart

• They stop moving completely

• They slow down and become more ordered

• They gain energy and move randomly

If a substance is at a temperature below its melting point, what state is it likely to be in?

• Solid

• Liquid

• Gas

Which of the following processes involves a gas changing into a liquid?

• Melting

• Freezing

• Condensation

• Sublimation

A substance has a melting point of -10°C and a boiling point of 90°C. What state will it be in at -15°C?

• Solid

• Liquid

• Gas

Which of the following best describes the movement of particles in a liquid?

• Particles are fixed in place and do not move

• Particles move freely and are far apart

• Particles slide past each other and are close together

• Particles move randomly at high speeds