Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 136 · 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? Which of these is the one thing we change? (a) days to see crystals (b) the amount of salt (c) sunny or shady place (d) the amount of water
2. 2.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) rusting iron (d) melting ice
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
4. 4.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) sugar (d) cooking oil
5. 5.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sawdust (d) food colour
6. 6.🧂 Which of these does not dissolve in water? (a) glucose powder (b) chalk powder (c) sugar (d) baking soda
7. 7.True or false: salt is not needed for growing salt crystals. (a) True (b) False
8. 8.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) the dish melts (d) salt grows roots
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.True or false: folding paper is a change that can be undone. (a) True (b) False
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) salt (c) warm water (d) a shallow dish
12. 12.⚖️ 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 measure it (b) we change it (c) we keep it the same
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) a piece of string (d) salt
15. 15.⚖️ 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 kind of salt (c) days to see crystals
16. 16.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
17. 17.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.True or false: baking a cake is a change that can be undone. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) sand (b) table salt (c) baking soda (d) glucose powder
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) warm water (d) a piece of string
21. 21.⚖️ 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
22. 22.🔍 Which is the odd one out? (a) food colour (b) sugar (c) glucose powder (d) chalk powder
23. 23.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
24. 24.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
26. 26.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
27. 27.True or false: sand dissolves in water. (a) True (b) False
28. 28.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
29. 29.⚖️ 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 change it (c) we measure it
30. 30.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
32. 32.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a battery cell (d) a piece of string
35. 35.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
36. 36.True or false: melting butter is a change that can be undone. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) small pebbles (d) cooking oil
38. 38.⚖️ 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 amount of water (c) days to see crystals
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) a piece of string (d) a balloon
40. 40.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) melting butter (d) rusting iron

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