Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 75 · 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: baking a cake is a change that cannot be undone. (a) False (b) True
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
3. 3.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a balloon (d) a spoon
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) turmeric powder (c) salt (d) warm water
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) salt (d) a spoon
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) a shallow dish (d) a piece of string
9. 9.True or false: sawdust does not dissolve in water. (a) False (b) True
10. 10.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) cooking an egg (d) melting butter
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) yeast (c) a shallow dish (d) salt
12. 12.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
14. 14.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
17. 17.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
18. 18.⚖️ 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
19. 19.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
20. 20.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
21. 21.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
24. 24.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
25. 25.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
26. 26.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) sawdust (d) small pebbles
27. 27.⚖️ 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
28. 28.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) dissolving salt (d) freezing water
29. 29.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) cooking an egg (d) rusting iron
30. 30.True or false: baking soda does not dissolve in water. (a) True (b) False
31. 31.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) warm water (d) a shallow dish
33. 33.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
34. 34.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) days to see crystals (d) the kind of salt
36. 36.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
37. 37.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
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.⚖️ 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) the amount of salt (c) the same dish (d) sunny or shady place
40. 40.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a magnet (d) warm water

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