Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 762 · 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.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
3. 3.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) salt (d) turmeric powder
5. 5.⚖️ 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) days to see crystals (c) the same dish (d) the amount of water
6. 6.🔮 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
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) salt (d) turmeric powder
8. 8.True or false: melting butter is a change that can be undone. (a) False (b) True
9. 9.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) a balloon (d) a magnet
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a spoon (d) a mirror
12. 12.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) sand (d) food colour
15. 15.True or false: melting ice is a change that cannot be undone. (a) False (b) True
16. 16.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a balloon (d) a spoon
18. 18.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a magnet (d) warm water
20. 20.True or false: folding paper is a change that cannot be undone. (a) True (b) False
21. 21.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) folding paper (c) freezing water (d) melting ice
24. 24.True or false: baking soda dissolves in water. (a) False (b) True
25. 25.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
26. 26.True or false: freezing water is a change that cannot be undone. (a) False (b) True
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a piece of string (d) a magnet
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) a piece of string (d) salt
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the same dish (c) days to see crystals
30. 30.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
31. 31.True or false: cooking an egg is a change that can be undone. (a) True (b) False
32. 32.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
33. 33.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
34. 34.🔮 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
35. 35.True or false: cooking oil dissolves in water. (a) True (b) False
36. 36.🧂 Which of these dissolves in water? (a) sand (b) glucose powder (c) small pebbles (d) chalk powder
37. 37.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.True or false: dissolving salt is a change that can be undone. (a) True (b) False
39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) a battery cell

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