Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 127 · 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 the one thing we change? (a) days to see crystals (b) the kind of salt (c) the amount of salt (d) sunny or shady place
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
3. 3.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) a shallow dish (d) salt
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
6. 6.True or false: food colour dissolves in water. (a) False (b) True
7. 7.True or false: baking soda dissolves in water. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) food colour (b) table salt (c) baking soda (d) small pebbles
9. 9.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.⚖️ 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
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
12. 12.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) food colour (d) small pebbles
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
14. 14.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
15. 15.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) sand (d) cooking oil
16. 16.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) sugar (d) chalk powder
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
18. 18.True or false: warm water is needed for growing salt crystals. (a) False (b) True
19. 19.True or false: food colour does not dissolve in water. (a) False (b) True
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) warm water (d) a balloon
21. 21.⚖️ 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 measure it (c) we change it
22. 22.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
23. 23.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting ice (c) baking a cake (d) cooking an egg
24. 24.🔍 Which is the odd one out? (a) sand (b) sawdust (c) glucose powder (d) chalk powder
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.True or false: sand does not dissolve in water. (a) False (b) True
28. 28.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
29. 29.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) rusting iron (d) freezing water
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) warm water (d) a battery cell
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) table salt (b) sand (c) sawdust (d) small pebbles
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a piece of string (d) salt
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a mirror (d) salt
37. 37.True or false: sand dissolves in water. (a) False (b) True
38. 38.True or false: sugar does not dissolve in water. (a) True (b) False
39. 39.True or false: cooking oil dissolves in water. (a) False (b) True
40. 40.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) baking a cake (d) dissolving salt

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