Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 46 · 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.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
2. 2.True or false: folding paper is a change that can be undone. (a) False (b) True
3. 3.True or false: chalk powder dissolves in water. (a) False (b) True
4. 4.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.⚖️ 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
8. 8.True or false: melting butter is a change that can be undone. (a) True (b) False
9. 9.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
10. 10.⚖️ 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
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
12. 12.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) a spoon (d) a shallow dish
14. 14.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
15. 15.⚖️ 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
16. 16.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) rusting iron (d) melting butter
17. 17.🧂 Which of these does not dissolve in water? (a) sand (b) table salt (c) baking soda (d) sugar
18. 18.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
19. 19.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
20. 20.True or false: melting ice is a change that cannot be undone. (a) False (b) True
21. 21.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
23. 23.⚖️ 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) True (b) False
24. 24.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a mirror (d) warm water
26. 26.True or false: food colour dissolves in water. (a) False (b) True
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) salt (c) a piece of string (d) warm water
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a battery cell (c) a piece of string (d) salt
31. 31.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
32. 32.True or false: sugar dissolves in water. (a) True (b) False
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) warm water (c) a balloon (d) a mirror
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) baking soda (d) table salt
36. 36.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) glucose powder (d) small pebbles
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
38. 38.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
39. 39.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.⚖️ 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 measure it (c) we keep it the same

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