Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 126 · 40 questions

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

1. 1.True or false: salt is needed for growing salt crystals. (a) False (b) True
2. 2.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
3. 3.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
4. 4.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a piece of string (d) a magnet
6. 6.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) folding paper (c) freezing water (d) dissolving salt
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
8. 8.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) freezing water (d) baking a cake
9. 9.True or false: baking a cake is a change that can be undone. (a) False (b) True
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
11. 11.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the same dish (d) the amount of salt
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a magnet (d) warm water
15. 15.True or false: table salt dissolves in water. (a) False (b) True
16. 16.True or false: freezing water is a change that cannot be undone. (a) True (b) False
17. 17.True or false: food colour dissolves in water. (a) True (b) False
18. 18.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
20. 20.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) cooking oil (d) small pebbles
21. 21.True or false: melting ice is a change that can be undone. (a) False (b) True
22. 22.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) browning lemon ink (d) cooking an egg
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a spoon (d) turmeric powder
24. 24.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
25. 25.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
27. 27.True or false: dissolving salt is a change that can be undone. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) chalk powder (d) sand
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) days to see crystals (b) the amount of salt (c) sunny or shady place (d) the amount of water
30. 30.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) table salt (d) food colour
31. 31.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a mirror (d) a shallow dish
33. 33.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a balloon (d) warm water
35. 35.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
36. 36.🧂 Which of these does not dissolve in water? (a) food colour (b) small pebbles (c) table salt (d) baking soda
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a battery cell (c) yeast (d) a magnet
38. 38.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) food colour (d) cooking oil
39. 39.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
40. 40.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve

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