Salt Crystal Experiment Worksheet

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

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