Matter can change state when it gains or loses heat energy. Melting changes solid to liquid, freezing changes liquid to solid, boiling or evaporation changes liquid to gas, and condensation changes gas to liquid. The substance itself stays the same.
Example
Ice melting into liquid water is a physical change because it is still water after the change.
Key terms
Melting:
A solid changing into a liquid.
Freezing:
A liquid changing into a solid.
Physical change:
A change that does not make a new substance.
Questions
1. This week, the key science idea is:
how heating and cooling change states of matter
memorising a definition without using evidence
choosing an answer before looking at observations
ignoring the conditions that affect a result
2. Which key term means “A solid changing into a liquid.”?
Melting
Freezing
Physical change
Variable
3. Which key term means “A liquid changing into a solid.”?
Freezing
Melting
Physical change
Prediction
4. Which key term means “A change that does not make a new substance.”?
Physical change
Melting
Freezing
Conclusion
5. Which action best helps a student learn about changes of state in daily life?
record the state changes involved in making an ice block or a cup of tea
Copy an answer without checking it
Skip the observations
Use only a guess
6. Why is evidence important when studying changes of state in daily life?
It helps us explain what is happening and check our ideas
It means we never need to observe carefully
It replaces all questions with guesses
It only matters after a test is finished
7. Which statement best connects to how heating and cooling change states of matter?
It is a useful focus for this science investigation.
It has nothing to do with science learning.
It means evidence is unnecessary.
It can only be studied in a laboratory.
8. A student records observations carefully while exploring changes of state in daily life. What are they building?
Evidence they can use to explain a pattern
A reason to ignore the results
A way to avoid checking their method
A random conclusion
9. Which is the best scientific habit for changes of state in daily life?
Notice details, record evidence and explain your reasoning
Change several things at once and guess
Use only the first result you see
Avoid comparing observations
10. If two observations appear different, what should a scientist do first?
Look for evidence and check what conditions were different
Choose the result they prefer
Delete both observations
Assume one must be wrong without checking
11. What makes the example in this lesson useful?
It links a real situation to the science idea
It avoids using any evidence
It proves every situation is identical
It replaces the need for careful thinking
12. Which response shows a student applying changes of state in daily life rather than just repeating words?
record the state changes involved in making an ice block or a cup of tea
Reciting the title only
Choosing the longest answer
Skipping the task
13. How can the key terms help when discussing changes of state in daily life?
They make explanations clearer and more precise
They make observations unnecessary
They remove the need for examples
They are only useful in a spelling test
14. A claim about changes of state in daily life should be strongest when it is:
Supported by observations or measurements
Based only on a guess
Copied without understanding
Unrelated to the investigation
15. Which is the fairest way to improve an investigation of changes of state in daily life?
Keep a clear method and check results carefully
Change the question halfway through
Choose results before testing
Leave out inconvenient evidence
16. Why might another scientist repeat work about changes of state in daily life?
To see whether the evidence and pattern hold up
To make the original evidence disappear
Because one result is always enough
To avoid recording data
17. A student has evidence that does not match their first idea. What is the best response?
Revise the explanation to fit the evidence
Ignore the evidence
Change the result to match the idea
Stop the investigation immediately
18. Which conclusion is most responsible after studying changes of state in daily life?
A conclusion that explains what the evidence supports and notes limits
A conclusion that claims more than the evidence shows
A conclusion with no evidence
A conclusion based on a favourite answer
19. How does changes of state in daily life connect to real life?
It can help people make observations and evidence-based choices
It has no possible application beyond a quiz
It means everyday evidence is never useful
It can only be discussed by experts
20. What is the best next step after completing this week’s investigation?
Explain what you found using the key terms and evidence
Forget the observations immediately
Assume every result will be the same
Avoid reflecting on the task
21. The most important outcome of this topic is to:
use evidence to understand how heating and cooling change states of matter
memorise unrelated facts
avoid asking questions
choose answers at random
Answer key (parent copy)
1. how heating and cooling change states of matter
2. Melting
3. Freezing
4. Physical change
5. record the state changes involved in making an ice block or a cup of tea
6. It helps us explain what is happening and check our ideas
7. It is a useful focus for this science investigation.
8. Evidence they can use to explain a pattern
9. Notice details, record evidence and explain your reasoning
10. Look for evidence and check what conditions were different
11. It links a real situation to the science idea
12. record the state changes involved in making an ice block or a cup of tea
13. They make explanations clearer and more precise
14. Supported by observations or measurements
15. Keep a clear method and check results carefully
16. To see whether the evidence and pattern hold up
17. Revise the explanation to fit the evidence
18. A conclusion that explains what the evidence supports and notes limits
19. It can help people make observations and evidence-based choices
20. Explain what you found using the key terms and evidence
21. use evidence to understand how heating and cooling change states of matter