Reversible and irreversible changes
5th grade (Year 6 in England) · 16 questions · Common Core: NGSS.2-PS1-4, NGSS.5-PS1-4 · England: KS2 Y5 Properties and changes of materials
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Date
Score/ 16
Question 1
Which change is irreversible?
- A. freezing water into ice
- B. toasting bread
- C. melting butter
- D. melting chocolate
Question 2
Which is a sign that a new material has been made?
- A. a puddle dries up
- B. sugar disappears in tea
- C. ice changes to water
- D. bubbles of gas are given off when two substances mix
Question 3
Is this change reversible or irreversible: melting chocolate?
- A. reversible
- B. irreversible
Question 4
Which change is reversible?
- A. mixing vinegar and bicarbonate of soda (baking soda)
- B. toasting bread
- C. baking a cake
- D. dissolving salt in water
Question 5
How could you get salt back after dissolving it in water?
- A. burn it
- B. freeze it
- C. filter it
- D. evaporate the water
Question 6
Is this change reversible or irreversible: boiling water into steam?
- A. reversible
- B. irreversible
Question 7
Which change is reversible?
- A. an iron nail rusting
- B. freezing water into ice
- C. mixing vinegar and bicarbonate of soda (baking soda)
- D. cooking an egg
Question 8
How could you get salt back after dissolving it in water?
- A. evaporate the water
- B. filter it
- C. burn it
- D. freeze it
Question 9
Is this change reversible or irreversible: toasting bread?
- A. reversible
- B. irreversible
Question 10
Which change is reversible?
- A. burning wood
- B. cooking an egg
- C. melting butter
- D. mixing vinegar and bicarbonate of soda (baking soda)
Question 11
Melted candle wax sets hard again when it cools. This change is…
- A. irreversible
- B. a chemical reaction
- C. burning
- D. reversible
Question 12
Is this change reversible or irreversible: an iron nail rusting?
- A. reversible
- B. irreversible
Question 13
Which change is reversible?
- A. toasting bread
- B. an iron nail rusting
- C. burning wood
- D. freezing water into ice
Question 14
How could you get salt back after dissolving it in water?
- A. filter it
- B. evaporate the water
- C. burn it
- D. freeze it
Question 15
Is this change reversible or irreversible: mixing vinegar and bicarbonate of soda (baking soda)?
- A. reversible
- B. irreversible
Question 16
Which change is reversible?
- A. mixing vinegar and bicarbonate of soda (baking soda)
- B. melting chocolate
- C. toasting bread
- D. cooking an egg
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