Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 228 · 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) warm water (b) salt (c) turmeric powder (d) a shallow dish
2. 2.⚖️ 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
3. 3.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) a battery cell
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) salt (d) a spoon
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
7. 7.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
8. 8.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
9. 9.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
10. 10.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
11. 11.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) rusting iron (d) freezing water
12. 12.⚖️ 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 change it (b) we keep it the same (c) we measure it
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
14. 14.⚖️ 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 water (c) sunny or shady place (d) the amount of salt
15. 15.⚖️ 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
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) salt (d) a spoon
17. 17.True or false: glucose powder does not dissolve in water. (a) True (b) False
18. 18.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
20. 20.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) salt rains down (d) sea water evaporates
21. 21.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
23. 23.True or false: baking soda does not dissolve in water. (a) True (b) False
24. 24.True or false: food colour does not dissolve in water. (a) False (b) True
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
26. 26.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
27. 27.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
28. 28.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) glucose powder (d) small pebbles
29. 29.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
31. 31.True or false: small pebbles does not dissolve in water. (a) False (b) True
32. 32.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) small pebbles (d) sugar
33. 33.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
34. 34.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
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 is a change that can be undone? (a) baking a cake (b) folding paper (c) rusting iron (d) browning lemon ink
38. 38.🔮 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
39. 39.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
40. 40.True or false: cooking oil does not dissolve in water. (a) True (b) False

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