Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 47 · 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? Which of these is the one thing we change? (a) the kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of water
2. 2.True or false: sugar does not dissolve in water. (a) True (b) False
3. 3.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) baking soda (d) small pebbles
4. 4.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
6. 6.🧂 Which of these dissolves in water? (a) small pebbles (b) table salt (c) sand (d) chalk powder
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a spoon (d) a balloon
9. 9.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
11. 11.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
12. 12.True or false: chalk powder does not dissolve in water. (a) True (b) False
13. 13.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
14. 14.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) warm water (c) a spoon (d) salt
16. 16.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) melting ice (d) milk turning to curd
17. 17.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
19. 19.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
20. 20.⚖️ 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 change it (b) we keep it the same (c) we measure it
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) turmeric powder (d) warm water
22. 22.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) glucose powder (d) small pebbles
23. 23.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) chalk powder (d) small pebbles
24. 24.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) salt (d) a mirror
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) a shallow dish (d) a balloon
27. 27.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) baking a cake (c) melting butter (d) folding paper
28. 28.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
30. 30.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
31. 31.🧈 Which of these is a change that can be undone? (a) folding paper (b) rusting iron (c) baking a cake (d) milk turning to curd
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of salt
33. 33.⚖️ 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
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
35. 35.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) sugar (d) sand
38. 38.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
39. 39.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
40. 40.🔮 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

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