Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 657 · 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 mirror for growing salt crystals? (a) not needed (b) needed
2. 2.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
3. 3.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) sawdust (d) chalk powder
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
5. 5.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
6. 6.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
7. 7.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
8. 8.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
9. 9.True or false: food colour does not dissolve in water. (a) False (b) True
10. 10.⚖️ 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) sunny or shady place (c) the amount of salt (d) days to see crystals
11. 11.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.True or false: sawdust dissolves in water. (a) False (b) True
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
14. 14.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) cooking oil (d) sugar
15. 15.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
16. 16.⚖️ 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) True (b) False
17. 17.⚖️ 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
18. 18.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) baking a cake (d) folding paper
19. 19.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to cool the water (d) to make it fizz
20. 20.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) rusting iron (d) freezing water
21. 21.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) melting ice (d) baking a cake
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) turmeric powder
23. 23.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
25. 25.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
26. 26.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
27. 27.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
28. 28.True or false: baking soda dissolves in water. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) cooking oil (b) baking soda (c) sawdust (d) sand
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
31. 31.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
32. 32.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) sawdust (d) sugar
33. 33.⚖️ 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
34. 34.True or false: warm water is needed for growing salt crystals. (a) False (b) True
35. 35.⚖️ 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
36. 36.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
37. 37.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) a spoon (d) salt
39. 39.True or false: sugar does not dissolve in water. (a) True (b) False
40. 40.True or false: a balloon is needed for growing salt crystals. (a) False (b) True

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