Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 121 · 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 what we measure? (a) days to see crystals (b) the kind of salt (c) the amount of salt (d) sunny or shady place
2. 2.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) baking a cake (d) freezing water
3. 3.⚖️ 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 kind of salt (b) sunny or shady place (c) the same dish (d) the amount of salt
4. 4.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) dissolving salt (d) melting ice
5. 5.True or false: baking soda does not dissolve in water. (a) False (b) True
6. 6.⚖️ 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 measure it (c) we keep it the same
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
8. 8.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
9. 9.⚖️ 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 keep it the same (c) we change it
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) a spoon (d) a shallow dish
11. 11.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) a battery cell
13. 13.⚖️ 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
14. 14.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
15. 15.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots
16. 16.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
17. 17.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
18. 18.🧂 Which of these does not dissolve in water? (a) cooking oil (b) sugar (c) baking soda (d) glucose powder
19. 19.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a mirror (d) a piece of string
21. 21.⚖️ 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 change it (b) we measure it (c) we keep it the same
22. 22.True or false: baking a cake is a change that can be undone. (a) False (b) True
23. 23.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
24. 24.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
25. 25.True or false: freezing water is a change that cannot be undone. (a) True (b) False
26. 26.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
27. 27.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) small pebbles (d) food colour
28. 28.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) warm water (d) turmeric powder
30. 30.True or false: melting butter is a change that cannot be undone. (a) True (b) False
31. 31.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
32. 32.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) yeast (c) a magnet (d) a balloon
34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
35. 35.True or false: small pebbles does not dissolve in water. (a) True (b) False
36. 36.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
37. 37.True or false: yeast is needed for growing salt crystals. (a) True (b) False
38. 38.⚖️ 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) False (b) True
39. 39.🔍 Which is the odd one out? (a) sugar (b) table salt (c) chalk powder (d) food colour
40. 40.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve

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