Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 971 · 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 is needed for growing salt crystals? (a) a magnet (b) warm water (c) a balloon (d) a mirror
2. 2.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) food colour (d) chalk powder
3. 3.True or false: sugar does not dissolve in water. (a) False (b) True
4. 4.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) glucose powder (d) small pebbles
5. 5.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
6. 6.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) folding paper (d) dissolving salt
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) glucose powder (d) baking soda
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) a spoon (d) warm water
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
10. 10.⚖️ 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
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a piece of string (d) a spoon
14. 14.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) sand (d) small pebbles
16. 16.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
17. 17.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) rusting iron (d) browning lemon ink
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
20. 20.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) melting butter (d) milk turning to curd
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) a piece of string (d) salt
22. 22.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) cooking oil (d) glucose powder
23. 23.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
24. 24.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
25. 25.⚖️ 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) days to see crystals (b) the amount of water (c) the amount of salt (d) sunny or shady place
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) yeast (c) a piece of string (d) a spoon
27. 27.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a balloon
29. 29.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) sawdust (d) baking soda
30. 30.⚖️ 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 same dish (b) the amount of salt (c) days to see crystals (d) the amount of water
31. 31.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
33. 33.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
34. 34.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
35. 35.⚖️ 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
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
37. 37.True or false: chalk powder dissolves in water. (a) True (b) False
38. 38.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
39. 39.🧂 Which of these dissolves in water? (a) sand (b) baking soda (c) chalk powder (d) cooking oil
40. 40.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone

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