Changes of State Flashcards

1️⃣ Familiarise yourself with the flashcards:

  • Look through all the flashcards to see what's on both sides.
  • Make sure you understand the information on each card. If something's unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

  • Look at the question or prompt on each card and try to remember the answer before flipping it over.
  • Check the answer and make a note of any cards you find challenging and need to go over more.

3️⃣ Consistently Review and Practice:

  • Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
  • Regularly review all the flashcards to help you better understand and retain the information over time.

Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

PERSONALISED 1-TO-1 TUTORING

Need more help on this topic? Get 1-to-1 support

Get support with clear explanations, practice and feedback (Ages 5 to 16).

  • DBS-checked tutors
  • Flexible times
  • Parents can be updated

Want an ad-free experience? Subscribe to remove ads

What is a change of state?

A change of state is when a substance changes between solid, liquid and gas without forming a new substance.

What is melting?

Melting is the change of state when a solid is heated and turns into a liquid.

What is freezing?

Freezing is the change of state when a liquid cools and turns into a solid.

What is boiling?

Boiling is the change of state when a liquid is heated so much that it turns into a gas throughout the liquid, at its boiling point.

What is evaporation?

Evaporation is when a liquid changes to a gas from its surface at temperatures below its boiling point.

What is condensation?

Condensation is the change of state when a gas cools and turns into a liquid.

What is sublimation?

Sublimation is when a solid changes straight to a gas, or a gas changes straight to a solid, without becoming a liquid.

What is meant by melting point?

The melting point is the fixed temperature at which a pure solid turns into a liquid.

What is meant by boiling point?

The boiling point is the fixed temperature at which a pure liquid boils and turns into a gas.

Why is a change of state a physical change?

It is a physical change because no new substance is made and the change is usually easy to reverse.

What happens to the mass of a pure substance when it changes state in a closed container?

The mass stays the same, because no particles are gained or lost, only their state changes.

What happens to the particles when a solid melts?

The particles gain energy, vibrate more, and can move past each other, so the solid becomes a liquid.

Revision Notes
If you're still curious or want to learn even more, click the button below to check out the revision notes for this topic and deepen your understanding!
View revision notes for this topic