Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 279 · 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.🧂 Which of these dissolves in water? (a) small pebbles (b) glucose powder (c) sawdust (d) cooking oil
2. 2.⚖️ 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
3. 3.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) warm water (c) a magnet (d) a balloon
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
5. 5.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
6. 6.⚖️ 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 measure it (b) we keep it the same (c) we change it
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 change it (b) we measure it (c) we keep it the same
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
9. 9.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a spoon (d) turmeric powder
11. 11.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) sawdust (d) baking soda
12. 12.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting butter (d) browning lemon ink
13. 13.⚖️ 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) sunny or shady place (c) the amount of salt (d) the same dish
14. 14.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
15. 15.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) salt (d) turmeric powder
17. 17.True or false: food colour does not dissolve in water. (a) True (b) False
18. 18.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
19. 19.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
20. 20.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
21. 21.True or false: small pebbles does not dissolve in water. (a) True (b) False
22. 22.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
23. 23.🔮 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
24. 24.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a shallow dish (d) a magnet
26. 26.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
27. 27.🔍 Which is the odd one out? (a) sand (b) table salt (c) food colour (d) baking soda
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) salt (d) a mirror
30. 30.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) small pebbles (d) food colour
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the kind of salt (c) the amount of water (d) days to see crystals
32. 32.True or false: melting ice is a change that can be undone. (a) False (b) True
33. 33.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a balloon (c) salt (d) a shallow dish
35. 35.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.⚖️ 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 keep it the same (c) we change it
37. 37.🧂 Which of these does not dissolve in water? (a) glucose powder (b) small pebbles (c) food colour (d) table salt
38. 38.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) chalk powder (d) sand
39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
40. 40.True or false: freezing water is a change that can be undone. (a) False (b) True

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