Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 794 · 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 not needed for growing salt crystals? (a) a magnet (b) warm water (c) a spoon (d) a piece of string
2. 2.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.⚖️ 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
4. 4.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) food colour (d) glucose powder
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) cooking an egg (d) dissolving salt
6. 6.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) freezing water (d) milk turning to curd
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
8. 8.⚖️ 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 same dish (b) days to see crystals (c) sunny or shady place
9. 9.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) magnetic (d) empty
10. 10.True or false: sawdust dissolves in water. (a) False (b) True
11. 11.True or false: sawdust does not dissolve in water. (a) True (b) False
12. 12.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
14. 14.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) turmeric powder
17. 17.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
18. 18.⚖️ 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 change it (b) we measure it (c) we keep it the same
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we change it (c) we measure it
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a shallow dish (d) warm water
21. 21.🧂 Which of these dissolves in water? (a) small pebbles (b) baking soda (c) sawdust (d) sand
22. 22.True or false: salt is needed for growing salt crystals. (a) True (b) False
23. 23.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
24. 24.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
25. 25.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
26. 26.True or false: yeast is needed for growing salt crystals. (a) True (b) False
27. 27.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
28. 28.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
29. 29.⚖️ 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
30. 30.True or false: chalk powder dissolves in water. (a) True (b) False
31. 31.True or false: table salt dissolves in water. (a) False (b) True
32. 32.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
33. 33.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
34. 34.True or false: glucose powder dissolves in water. (a) True (b) False
35. 35.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
36. 36.🧂 Which of these dissolves in water? (a) sawdust (b) table salt (c) small pebbles (d) cooking oil
37. 37.⚖️ 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 same dish (b) the amount of salt (c) the kind of salt (d) sunny or shady place
38. 38.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
39. 39.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
40. 40.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet

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