Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 178 · 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 shallow dish (c) warm water (d) yeast
2. 2.⚖️ 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) sunny or shady place (c) days to see crystals
3. 3.True or false: melting ice is a change that cannot be undone. (a) True (b) False
4. 4.True or false: baking soda does not dissolve in water. (a) False (b) True
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) the amount of water (b) sunny or shady place (c) the amount of salt (d) the same dish
6. 6.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
8. 8.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
9. 9.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
10. 10.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
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 measure it (c) we keep it the same
12. 12.True or false: small pebbles does not dissolve in water. (a) False (b) True
13. 13.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) food colour (d) table salt
15. 15.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
16. 16.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
17. 17.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
18. 18.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) chalk powder (d) baking soda
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
20. 20.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a balloon (d) a piece of string
22. 22.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) cooking an egg (d) dissolving salt
24. 24.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
25. 25.⚖️ 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 keep it the same (c) we change it
26. 26.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
28. 28.True or false: yeast 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 what we measure. (a) False (b) True
30. 30.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.True or false: sand dissolves in water. (a) True (b) False
33. 33.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting ice (c) baking a cake (d) browning lemon ink
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) salt (d) a piece of string
35. 35.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) chalk powder (d) baking soda
36. 36.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) milk turning to curd (d) melting butter
37. 37.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a spoon (d) a mirror
39. 39.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) sand (d) baking soda
40. 40.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve

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