Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 286 · 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.True or false: chalk powder does not dissolve in water. (a) True (b) False
2. 2.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) small pebbles (d) sugar
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a balloon (d) a piece of string
4. 4.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
5. 5.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
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 change it (b) we measure it (c) we keep it the same
8. 8.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) empty (d) frozen
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
10. 10.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
12. 12.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
13. 13.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) baking a cake (c) dissolving salt (d) folding paper
14. 14.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
15. 15.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
16. 16.⚖️ 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) sunny or shady place (b) the same dish (c) the kind of salt (d) the amount of salt
17. 17.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) a battery cell (d) a piece of string
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 measure it (c) we change it
20. 20.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
23. 23.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting ice (c) browning lemon ink (d) milk turning to curd
24. 24.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
25. 25.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
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) days to see crystals (c) the kind of salt (d) the amount of salt
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
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 measure it (b) we change it (c) we keep it the same
29. 29.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
30. 30.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) small pebbles (d) cooking oil
32. 32.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
33. 33.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) small pebbles (d) sand
35. 35.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) glucose powder (d) baking soda
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a piece of string (d) a balloon
39. 39.🧂 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
40. 40.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) cooking an egg (c) melting ice (d) melting butter

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