Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 299 · 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) a shallow dish (b) a magnet (c) a piece of string (d) a spoon
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) yeast (c) warm water (d) a piece of string
3. 3.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of water (b) sunny or shady place (c) days to see crystals
7. 7.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) sawdust (d) small pebbles
9. 9.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) days to see crystals (d) the amount of water
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
13. 13.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
14. 14.🧂 Which of these dissolves in water? (a) small pebbles (b) baking soda (c) cooking oil (d) chalk powder
15. 15.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
16. 16.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
17. 17.True or false: small pebbles does not dissolve in water. (a) True (b) False
18. 18.⚖️ 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
19. 19.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a balloon (d) a spoon
21. 21.🧂 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
22. 22.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) dissolving salt (d) milk turning to curd
23. 23.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) food colour (d) baking soda
25. 25.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
26. 26.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
27. 27.🔮 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
28. 28.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
29. 29.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) browning lemon ink (d) melting ice
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a mirror (d) a piece of string
31. 31.True or false: baking soda dissolves in water. (a) True (b) False
32. 32.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
33. 33.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
34. 34.🧂 Which of these dissolves in water? (a) cooking oil (b) table salt (c) chalk powder (d) sand
35. 35.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny spheres (d) tiny stars
36. 36.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
37. 37.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) melting butter (d) baking a cake
38. 38.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) cooking an egg (d) dissolving salt
39. 39.🧂 Which of these does not dissolve in water? (a) table salt (b) cooking oil (c) baking soda (d) sugar
40. 40.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed

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