Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 594 · 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.🧂 Which of these does not dissolve in water? (a) sand (b) baking soda (c) sugar (d) table salt
2. 2.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a piece of string (c) a battery cell (d) a mirror
3. 3.True or false: baking a cake is a change that can be undone. (a) True (b) False
4. 4.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) sand (d) table salt
5. 5.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
6. 6.⚖️ 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) True (b) False
7. 7.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
8. 8.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) warm water (d) yeast
10. 10.True or false: melting butter is a change that cannot be undone. (a) True (b) False
11. 11.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) glucose powder (d) chalk powder
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
13. 13.⚖️ 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 amount of water (c) the kind of salt (d) the amount of salt
14. 14.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
15. 15.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) milk turning to curd (d) melting ice
16. 16.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) warm water (d) salt
19. 19.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a spoon (d) a mirror
22. 22.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
23. 23.🧺 Do we need warm water 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? What do we do with “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a battery cell (d) salt
26. 26.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
28. 28.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) sugar (d) small pebbles
29. 29.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
30. 30.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
31. 31.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) melting butter (d) rusting iron
32. 32.True or false: rusting iron is a change that can be undone. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) baking soda (d) table salt
34. 34.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
35. 35.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) turmeric powder (d) a spoon
37. 37.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sawdust (d) food colour
38. 38.True or false: folding paper is a change that cannot be undone. (a) False (b) True
39. 39.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone

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