Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 100 · 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 amount of salt is the one thing we change. (a) True (b) False
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) turmeric powder (d) a spoon
4. 4.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
5. 5.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
6. 6.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
8. 8.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) sugar (d) chalk powder
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) warm water (d) a magnet
11. 11.⚖️ 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
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
13. 13.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a balloon (d) a piece of string
15. 15.True or false: cooking oil dissolves in water. (a) True (b) False
16. 16.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
17. 17.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
18. 18.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a piece of string (d) turmeric powder
20. 20.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) small pebbles (d) cooking oil
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a spoon (d) a mirror
22. 22.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.⚖️ 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) the same dish (c) sunny or shady place (d) the amount of salt
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.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) cooking an egg (d) freezing water
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
28. 28.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) sugar (d) cooking oil
29. 29.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) folding paper (d) baking a cake
30. 30.🔮 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
31. 31.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) table salt (d) small pebbles
32. 32.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
33. 33.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
34. 34.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) cooking oil (d) food colour
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
36. 36.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) chalk powder (d) sand
37. 37.⚖️ 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
38. 38.True or false: folding paper is a change that cannot be undone. (a) True (b) False
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the amount of water (c) days to see crystals
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a battery cell (d) salt

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