Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 343 · 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 is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a mirror (d) salt
2. 2.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
3. 3.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a spoon (d) a balloon
5. 5.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) baking a cake (d) milk turning to curd
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 water”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
8. 8.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sugar (d) chalk powder
11. 11.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
12. 12.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
14. 14.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
15. 15.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
16. 16.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) small pebbles (d) sugar
18. 18.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
19. 19.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.⚖️ 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 change it (b) we keep it the same (c) we measure it
21. 21.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a magnet (c) yeast (d) a balloon
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a magnet (d) warm water
25. 25.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) cooking oil (d) glucose powder
26. 26.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
27. 27.⚖️ 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 amount of salt (b) sunny or shady place (c) the kind of salt (d) the amount of water
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a piece of string (d) a shallow dish
29. 29.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
30. 30.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
31. 31.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
32. 32.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) yeast (d) a piece of string
34. 34.True or false: cooking an egg is a change that can be undone. (a) True (b) False
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
36. 36.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
37. 37.⚖️ 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
38. 38.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
39. 39.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
40. 40.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) sawdust (d) sugar

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