Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 747 · 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.⚖️ 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 kind of salt (c) days to see crystals (d) the same dish
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a mirror (d) warm water
3. 3.True or false: salt is not needed for growing salt crystals. (a) True (b) False
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
5. 5.True or false: yeast is needed for growing salt crystals. (a) False (b) True
6. 6.⚖️ 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 measure it (c) we change it
7. 7.⚖️ 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
8. 8.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) milk turning to curd (c) melting butter (d) folding paper
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
10. 10.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) glucose powder (d) cooking oil
11. 11.⚖️ 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 measure it (b) we keep it the same (c) we change it
12. 12.⚖️ 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) days to see crystals (c) the kind of salt (d) sunny or shady place
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a spoon (d) turmeric powder
18. 18.True or false: freezing water is a change that cannot be undone. (a) True (b) False
19. 19.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.🧈 Which of these is a change that can be undone? (a) folding paper (b) browning lemon ink (c) milk turning to curd (d) rusting iron
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the same dish
22. 22.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
23. 23.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) small pebbles (d) table salt
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
25. 25.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
26. 26.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) melting ice (d) baking a cake
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a magnet (c) a piece of string (d) a spoon
28. 28.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
29. 29.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
30. 30.True or false: chalk powder does not dissolve in water. (a) False (b) True
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) a spoon (d) a shallow dish
32. 32.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
33. 33.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) browning lemon ink (d) dissolving salt
34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
35. 35.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
36. 36.⚖️ 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
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) yeast
39. 39.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
40. 40.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil

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