Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 344 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a piece of string (d) a battery cell
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
5. 5.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) sand (d) chalk powder
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a mirror
8. 8.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
9. 9.True or false: cooking an egg is a change that can be undone. (a) False (b) True
10. 10.True or false: baking a cake is a change that can be undone. (a) True (b) False
11. 11.True or false: freezing water is a change that cannot be undone. (a) False (b) True
12. 12.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
13. 13.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) table salt (d) chalk powder
14. 14.🧂 Which of these dissolves in water? (a) sand (b) table salt (c) chalk powder (d) cooking oil
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a spoon (c) turmeric powder (d) a mirror
16. 16.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
17. 17.True or false: table salt does not dissolve in water. (a) True (b) False
18. 18.⚖️ 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
19. 19.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) sugar (d) cooking oil
20. 20.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
21. 21.True or false: small pebbles dissolves in water. (a) True (b) False
22. 22.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
23. 23.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) cooking an egg (d) melting ice
26. 26.⚖️ 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) sunny or shady place (b) the amount of water (c) the amount of salt (d) days to see crystals
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
28. 28.🔍 Which is the odd one out? (a) table salt (b) sugar (c) sawdust (d) glucose powder
29. 29.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a shallow dish (d) a magnet
31. 31.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
32. 32.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.⚖️ 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 amount of salt (c) sunny or shady place
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a magnet (c) salt (d) a piece of string
35. 35.⚖️ 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) True (b) False
36. 36.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
38. 38.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.⚖️ 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 measure it (b) we keep it the same (c) we change it
40. 40.🧂 Which of these does not dissolve in water? (a) sugar (b) small pebbles (c) baking soda (d) glucose powder

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