Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 59 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
2. 2.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
3. 3.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) cooking an egg (d) baking a cake
4. 4.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) chalk powder (d) table salt
5. 5.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
6. 6.True or false: rusting iron is a change that can be undone. (a) True (b) False
7. 7.🧈 Which of these is a change that can be undone? (a) melting ice (b) cooking an egg (c) milk turning to curd (d) baking a cake
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) a spoon (d) a shallow dish
9. 9.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
11. 11.True or false: salt is needed for growing salt crystals. (a) True (b) False
12. 12.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
13. 13.⚖️ 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
14. 14.⚖️ 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 change it (b) we measure it (c) we keep it the same
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the amount of water (c) sunny or shady place
17. 17.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
18. 18.True or false: melting ice is a change that cannot be undone. (a) True (b) False
19. 19.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
20. 20.True or false: cooking oil dissolves in water. (a) True (b) False
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a magnet (d) salt
22. 22.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
24. 24.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
26. 26.True or false: table salt dissolves in water. (a) True (b) False
27. 27.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) a balloon
29. 29.⚖️ 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
30. 30.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) milk turning to curd (c) folding paper (d) freezing water
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) a balloon (d) yeast
33. 33.🔍 Which is the odd one out? (a) sand (b) sugar (c) baking soda (d) glucose powder
34. 34.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) a piece of string (d) a spoon
36. 36.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
37. 37.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
38. 38.True or false: table salt does not dissolve in water. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) sand (d) cooking oil
40. 40.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil

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