Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 204 · 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.🛟 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
2. 2.⚖️ 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
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
4. 4.⚖️ 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
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of salt (c) the same dish (d) sunny or shady place
6. 6.⚖️ 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 same dish (b) days to see crystals (c) the amount of water (d) sunny or shady place
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
9. 9.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) salt (d) a shallow dish
11. 11.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a battery cell (d) a shallow dish
13. 13.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
14. 14.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) chalk powder (d) sand
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a shallow dish (c) turmeric powder (d) yeast
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
18. 18.True or false: rusting iron is a change that can be undone. (a) False (b) True
19. 19.True or false: sand dissolves in water. (a) True (b) False
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
21. 21.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) salt (d) warm water
23. 23.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) cooking oil (d) small pebbles
24. 24.🔍 Which is the odd one out? (a) sugar (b) table salt (c) baking soda (d) chalk powder
25. 25.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a magnet (d) salt
27. 27.True or false: food colour dissolves in water. (a) True (b) False
28. 28.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
29. 29.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
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 kept the same. (a) True (b) False
31. 31.True or false: cooking oil does not dissolve in water. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) a piece of string (d) salt
33. 33.True or false: baking a cake is a change that can be undone. (a) False (b) True
34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) salt (d) yeast
36. 36.True or false: glucose powder does not dissolve in water. (a) True (b) False
37. 37.🧂 Which of these dissolves in water? (a) sand (b) baking soda (c) chalk powder (d) small pebbles
38. 38.True or false: warm water is needed for growing salt crystals. (a) False (b) True
39. 39.True or false: sawdust does not dissolve in water. (a) True (b) False
40. 40.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone

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