Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 391 · 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.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny stars (d) tiny triangles
2. 2.🔍 Which is the odd one out? (a) sugar (b) food colour (c) glucose powder (d) cooking oil
3. 3.🧂 Which of these does not dissolve in water? (a) sand (b) glucose powder (c) baking soda (d) food colour
4. 4.⚖️ 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) False (b) True
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
6. 6.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) cooking an egg (d) browning lemon ink
7. 7.🧺 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 battery cell
8. 8.🧂 Which of these dissolves in water? (a) sawdust (b) food colour (c) chalk powder (d) cooking oil
9. 9.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
10. 10.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
11. 11.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) chalk powder (d) glucose powder
12. 12.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) sugar (d) chalk powder
13. 13.True or false: chalk powder dissolves in water. (a) True (b) False
14. 14.True or false: sugar does not dissolve in water. (a) True (b) False
15. 15.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
17. 17.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) baking a cake (d) dissolving salt
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
20. 20.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
21. 21.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.⚖️ 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
24. 24.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
25. 25.⚖️ 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) the kind of salt (c) sunny or shady place (d) the amount of water
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) the same dish (c) the kind of salt (d) days to see crystals
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a spoon (d) a balloon
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
29. 29.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sugar (d) cooking oil
30. 30.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a balloon (c) a mirror (d) a battery cell
31. 31.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
32. 32.⚖️ 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 keep it the same (b) we change it (c) we measure it
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
34. 34.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
36. 36.True or false: melting ice is a change that cannot be undone. (a) True (b) False
37. 37.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
38. 38.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
39. 39.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) freezing water (d) baking a cake
40. 40.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone

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