Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 568 · 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? Which of these is what we measure? (a) the amount of salt (b) days to see crystals (c) the amount of water (d) sunny or shady place
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
3. 3.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
4. 4.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
6. 6.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
9. 9.⚖️ 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 measure it (c) we change it
10. 10.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) warm water (d) turmeric powder
15. 15.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
16. 16.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) sand (d) food colour
17. 17.🧂 Which of these dissolves in water? (a) baking soda (b) chalk powder (c) sawdust (d) small pebbles
18. 18.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) sugar (d) glucose powder
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) a magnet (d) yeast
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
23. 23.⚖️ 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 keep it the same (b) we change it (c) we measure it
24. 24.True or false: sawdust dissolves in water. (a) True (b) False
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a mirror (c) a magnet (d) yeast
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) warm water (d) yeast
27. 27.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) table salt (d) cooking oil
28. 28.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
29. 29.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
30. 30.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) dissolving salt (d) rusting iron
31. 31.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.True or false: folding paper is a change that can be undone. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) glucose powder (d) chalk powder
34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a spoon (c) a shallow dish (d) a piece of string
36. 36.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
37. 37.True or false: baking a cake is a change that can be undone. (a) False (b) True
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
39. 39.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
40. 40.True or false: small pebbles dissolves in water. (a) True (b) False

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