Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 401 · 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.⚖️ 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 measure it (c) we change it
2. 2.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
3. 3.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
4. 4.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) food colour (d) cooking oil
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) the same dish (c) the amount of salt (d) the amount of water
6. 6.⚖️ 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 same dish (c) sunny or shady place
7. 7.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) chalk powder (d) sand
8. 8.⚖️ 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
9. 9.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) melting butter (d) baking a cake
10. 10.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) dissolving salt (d) baking a cake
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
12. 12.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
13. 13.True or false: glucose powder does not dissolve in water. (a) False (b) True
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) a battery cell
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
16. 16.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
18. 18.True or false: sugar does not dissolve in water. (a) False (b) True
19. 19.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) salt rains down (d) fish make it
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) a spoon (d) salt
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.🧂 Which of these dissolves in water? (a) food colour (b) chalk powder (c) cooking oil (d) small pebbles
23. 23.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) food colour (d) baking soda
24. 24.True or false: warm water is needed for growing salt crystals. (a) True (b) False
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
26. 26.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
27. 27.True or false: chalk powder does not dissolve in water. (a) False (b) True
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a mirror (c) a battery cell (d) a magnet
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
30. 30.🔮 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
31. 31.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) cooking oil (d) table salt
32. 32.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
33. 33.True or false: yeast is needed for growing salt crystals. (a) False (b) True
34. 34.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a mirror (c) a spoon (d) a shallow dish
36. 36.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.True or false: melting butter is a change that can be undone. (a) False (b) True
39. 39.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) milk turning to curd (c) freezing water (d) dissolving salt
40. 40.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place

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