Welcome to your B6 Practice Questions 2.3 – Reversible changes

1. 
When ice melts into liquid water, what kind of change is this?

2. 

A change of state is a change.

3. 
In a physical change, the substance changes into a new substance.

4. 

We can change liquid water back to solid ice. We say that this change is .

5. 
What happens when you put liquid water back in the freezer?

6. 

Changes to substances that cannot be reversed are called changes.

7. 
When we burn a match, the wood changes into a black substance called carbon.

8. 

When an irreversible change turns one substance into another substance, there is a change.

9. 
Why is sea water salty?

10. 

The substance that dissolves is called the .

11. 
The substance in which the solute dissolves is called the solvent.

12. 

Together, the solute and the solvent form a .

13. 
A solution has a uniform appearance. What does this mean?

14. 

The rate is how something happens.

15. 
Stirring makes a solid solute dissolve more slowly.

16. 

In a heated solvent, the particles of the solute gain and move faster.