Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 575 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.True or false: table salt does not dissolve in water. (a) False (b) True
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a magnet (c) warm water (d) a spoon
6. 6.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) cooking oil (d) baking soda
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) salt (d) a magnet
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
9. 9.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) small pebbles (d) glucose powder
10. 10.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
11. 11.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the same dish (c) sunny or shady place
13. 13.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
14. 14.True or false: sand does not dissolve in water. (a) True (b) False
15. 15.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
17. 17.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) table salt (d) glucose powder
18. 18.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) folding paper (d) rusting iron
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
21. 21.⚖️ 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 keep it the same (c) we measure it
22. 22.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
23. 23.True or false: melting butter is a change that cannot be undone. (a) True (b) False
24. 24.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a shallow dish (d) turmeric powder
25. 25.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) sand (d) baking soda
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.True or false: folding paper is a change that cannot be undone. (a) False (b) True
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) turmeric powder (d) a spoon
29. 29.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
31. 31.🧂 Which of these does not dissolve in water? (a) small pebbles (b) sugar (c) glucose powder (d) food colour
32. 32.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) folding paper (d) rusting iron
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) a shallow dish (d) warm water
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the amount of water (c) days to see crystals
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a piece of string (d) a battery cell
36. 36.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
37. 37.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
38. 38.⚖️ 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) the amount of water (b) the same dish (c) sunny or shady place (d) the amount of salt
39. 39.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
40. 40.True or false: melting ice is a change that can be undone. (a) True (b) False

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