Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 745 · 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? True or false: the amount of salt is what we measure. (a) False (b) True
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
3. 3.⚖️ 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
4. 4.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sawdust (c) food colour (d) table salt
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) sugar crystals form (d) it turns to butter
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 change it (b) we keep it the same (c) we measure it
8. 8.True or false: warm water is needed for growing salt crystals. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) glucose powder (d) sawdust
10. 10.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) a piece of string (c) warm water (d) salt
12. 12.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) sand (d) food colour
13. 13.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.True or false: chalk powder does not dissolve in water. (a) True (b) False
15. 15.True or false: sugar dissolves in water. (a) False (b) True
16. 16.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
17. 17.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) table salt (d) cooking oil
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) a shallow dish (d) a balloon
19. 19.True or false: salt is needed for growing salt crystals. (a) False (b) True
20. 20.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) melting ice (d) melting butter
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
22. 22.⚖️ 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
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
24. 24.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
25. 25.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) table salt (d) chalk powder
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) yeast
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
28. 28.⚖️ 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 same dish (d) the amount of water
29. 29.⚖️ 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
30. 30.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
31. 31.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
33. 33.True or false: rusting iron is a change that can be undone. (a) True (b) False
34. 34.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
35. 35.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
37. 37.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
38. 38.True or false: salt is not needed for growing salt crystals. (a) True (b) False
39. 39.⚖️ 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
40. 40.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False

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