Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 926 · 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) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
2. 2.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
3. 3.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a piece of string (c) turmeric powder (d) yeast
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a battery cell (d) a spoon
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
8. 8.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) chalk powder (d) sugar
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a battery cell (d) salt
12. 12.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
13. 13.True or false: small pebbles dissolves in water. (a) False (b) True
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
15. 15.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
16. 16.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
17. 17.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
18. 18.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) warm water (d) a balloon
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) a spoon (d) a piece of string
20. 20.True or false: sawdust does not dissolve in water. (a) True (b) False
21. 21.⚖️ 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 amount of salt (d) the same dish
22. 22.⚖️ 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 kind of salt (b) the amount of salt (c) the same dish (d) days to see crystals
23. 23.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) melting ice (d) baking a cake
24. 24.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) melting ice (d) milk turning to curd
26. 26.⚖️ 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 change it (c) we measure it
27. 27.🔍 Which is the odd one out? (a) sand (b) table salt (c) cooking oil (d) chalk powder
28. 28.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) browning lemon ink (d) freezing water
29. 29.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sugar (d) small pebbles
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a balloon (c) a shallow dish (d) a piece of string
31. 31.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) warm water (d) salt
33. 33.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
34. 34.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
35. 35.⚖️ 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
36. 36.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) freezing water (d) rusting iron
37. 37.True or false: glucose powder dissolves in water. (a) True (b) False
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) turmeric powder
39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
40. 40.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone

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