Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 312 · 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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
2. 2.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) turmeric powder
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) warm water (d) a battery cell
6. 6.True or false: table salt does not dissolve in water. (a) True (b) False
7. 7.True or false: cooking an egg is a change that can be undone. (a) True (b) False
8. 8.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
10. 10.True or false: salt is not needed for growing salt crystals. (a) False (b) True
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
12. 12.⚖️ 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) True (b) False
13. 13.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
14. 14.🛟 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
15. 15.⚖️ 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
16. 16.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
17. 17.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
18. 18.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) glucose powder (d) chalk powder
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
20. 20.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) warm water (d) salt
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a piece of string (c) a shallow dish (d) warm water
23. 23.⚖️ 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 measure it (b) we keep it the same (c) we change it
24. 24.⚖️ 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
25. 25.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) glucose powder (d) sugar
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a balloon (d) a shallow dish
27. 27.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
28. 28.🔍 Which is the odd one out? (a) sand (b) food colour (c) chalk powder (d) cooking oil
29. 29.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) table salt (d) sawdust
30. 30.True or false: cooking oil dissolves in water. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) glucose powder (d) sand
32. 32.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
33. 33.🔍 Which is the odd one out? (a) glucose powder (b) cooking oil (c) food colour (d) table salt
34. 34.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
35. 35.⚖️ 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) True (b) False
36. 36.⚖️ 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
37. 37.⚖️ 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 change it (c) we keep it the same
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True

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