Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 500 · 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: melting butter is a change that cannot be undone. (a) False (b) True
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
3. 3.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) yeast (d) a magnet
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) table salt (b) sugar (c) small pebbles (d) glucose powder
6. 6.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
7. 7.⚖️ 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
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) False (b) True
9. 9.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
10. 10.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) salt (c) a balloon (d) a magnet
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) turmeric powder
14. 14.True or false: salt is needed for growing salt crystals. (a) False (b) True
15. 15.True or false: freezing water is a change that can be undone. (a) False (b) True
16. 16.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) small pebbles (d) table salt
17. 17.🔮 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
18. 18.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a battery cell (c) warm water (d) a piece of string
20. 20.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
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 keep it the same (b) we measure it (c) we change it
22. 22.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
23. 23.True or false: sugar dissolves in water. (a) False (b) True
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) cooking an egg (d) baking a cake
26. 26.🔍 Which is the odd one out? (a) table salt (b) sugar (c) sand (d) food colour
27. 27.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
28. 28.True or false: glucose powder does not dissolve in water. (a) True (b) False
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.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) yeast (c) a mirror (d) a balloon
33. 33.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
34. 34.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the kind of salt (c) days to see crystals (d) the same dish
37. 37.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) cooking oil (d) sand
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) a spoon (d) turmeric powder
39. 39.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) baking a cake (d) folding paper
40. 40.⚖️ 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) False (b) True

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