Salt Crystal Experiment Worksheet

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

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