Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 615 · 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? What do we do with “the amount of salt”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.True or false: rusting iron is a change that can be undone. (a) False (b) True
3. 3.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) rusting iron (d) melting ice
4. 4.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) sand (d) baking soda
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) a piece of string (d) a shallow dish
6. 6.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) glucose powder (d) baking soda
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
8. 8.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
9. 9.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
10. 10.🔍 Which is the odd one out? (a) small pebbles (b) food colour (c) glucose powder (d) baking soda
11. 11.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) sand (d) sawdust
12. 12.🔮 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
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a mirror (d) salt
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) turmeric powder (d) a spoon
15. 15.True or false: sawdust dissolves in water. (a) False (b) True
16. 16.⚖️ 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 same dish
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a piece of string (d) a magnet
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
19. 19.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) baking soda (d) sawdust
20. 20.True or false: glucose powder dissolves in water. (a) True (b) False
21. 21.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) freezing water (d) browning lemon ink
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a spoon (c) warm water (d) a piece of string
23. 23.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
24. 24.⚖️ 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) days to see crystals (c) the amount of water (d) the kind of salt
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) sunny or shady place (c) the amount of water (d) the same dish
26. 26.True or false: folding paper is a change that cannot be undone. (a) False (b) True
27. 27.⚖️ 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
28. 28.⚖️ 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 change it (c) we measure it
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a balloon (c) a battery cell (d) yeast
30. 30.⚖️ 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) False (b) True
31. 31.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sand (d) table salt
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) yeast (d) a mirror
33. 33.True or false: yeast is needed for growing salt crystals. (a) True (b) False
34. 34.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
35. 35.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
36. 36.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting ice (c) melting butter (d) freezing water
37. 37.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
38. 38.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
40. 40.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts

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