Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 674 · 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.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
3. 3.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
4. 4.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
5. 5.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) cooking an egg (d) folding paper
7. 7.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
8. 8.🧂 Which of these does not dissolve in water? (a) sawdust (b) food colour (c) sugar (d) table salt
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.True or false: dissolving salt is a change that can be undone. (a) True (b) False
12. 12.True or false: warm water is needed for growing salt crystals. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) sand (b) sugar (c) small pebbles (d) sawdust
14. 14.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) glucose powder (d) sugar
15. 15.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to make it fizz (d) to change its colour
16. 16.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) sawdust (d) glucose powder
17. 17.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
19. 19.⚖️ 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
20. 20.⚖️ 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 water (b) the same dish (c) days to see crystals (d) sunny or shady place
21. 21.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) turmeric powder (d) a magnet
23. 23.🔍 Which is the odd one out? (a) table salt (b) small pebbles (c) sugar (d) food colour
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) yeast (d) a piece of string
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) warm water (c) a balloon (d) turmeric powder
27. 27.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
28. 28.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) browning lemon ink (d) melting ice
29. 29.⚖️ 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) days to see crystals (c) the amount of water
30. 30.⚖️ 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 change it (c) we measure it
31. 31.True or false: sand does not dissolve in water. (a) False (b) True
32. 32.True or false: sawdust dissolves in water. (a) True (b) False
33. 33.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a balloon (d) salt
35. 35.True or false: sugar dissolves in water. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) chalk powder (d) small pebbles
37. 37.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
38. 38.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🔍 Which is the odd one out? (a) cooking oil (b) baking soda (c) food colour (d) sugar

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