Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 143 · 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? True or false: the kind of salt is kept the same. (a) False (b) True
2. 2.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) milk turning to curd (d) browning lemon ink
3. 3.🧂 Which of these dissolves in water? (a) chalk powder (b) sugar (c) cooking oil (d) small pebbles
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
5. 5.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
7. 7.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
8. 8.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
9. 9.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) browning lemon ink (d) freezing water
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) cooking an egg (d) freezing water
13. 13.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.True or false: freezing water is a change that cannot be undone. (a) True (b) False
15. 15.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
16. 16.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
17. 17.⚖️ 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) sunny or shady place (c) the kind of salt
18. 18.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
19. 19.True or false: melting ice is a change that cannot be undone. (a) False (b) True
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) a mirror (d) yeast
21. 21.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
22. 22.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
23. 23.True or false: food colour does not dissolve in water. (a) False (b) True
24. 24.⚖️ 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 change it (c) we keep it the same
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a magnet (d) a spoon
26. 26.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
27. 27.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a piece of string (c) a spoon (d) warm water
30. 30.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) yeast (d) a shallow dish
33. 33.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) sand (d) small pebbles
34. 34.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
35. 35.True or false: salt is not needed for growing salt crystals. (a) False (b) True
36. 36.True or false: melting butter is a change that cannot be undone. (a) False (b) True
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) turmeric powder (d) a piece of string
38. 38.True or false: baking soda dissolves in water. (a) True (b) False
39. 39.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) a battery cell

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