Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 994 · 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? What do we do with “the amount of salt”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.True or false: freezing water is a change that cannot be undone. (a) True (b) False
3. 3.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a battery cell (d) warm water
6. 6.⚖️ 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) True (b) False
7. 7.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) yeast (d) warm water
9. 9.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) food colour (d) sawdust
10. 10.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.⚖️ 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) days to see crystals (b) the kind of salt (c) the amount of water (d) sunny or shady place
12. 12.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) magnetic (d) empty
13. 13.True or false: melting ice is a change that cannot be undone. (a) True (b) False
14. 14.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
15. 15.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
16. 16.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
17. 17.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) salt rains down (d) sea water evaporates
18. 18.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
20. 20.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
21. 21.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
22. 22.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
23. 23.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
24. 24.⚖️ 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
25. 25.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) browning lemon ink (d) baking a cake
26. 26.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) a shallow dish (d) a spoon
28. 28.🧂 Which of these does not dissolve in water? (a) table salt (b) sand (c) glucose powder (d) sugar
29. 29.True or false: cooking an egg is a change that can be undone. (a) False (b) True
30. 30.True or false: melting butter is a change that cannot be undone. (a) False (b) True
31. 31.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.⚖️ 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 amount of salt (b) the kind of salt (c) days to see crystals (d) sunny or shady place
33. 33.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
34. 34.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) folding paper (d) dissolving salt
35. 35.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) baking soda (d) sand
36. 36.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) cooking oil (d) sand
37. 37.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) baking soda (d) cooking oil
38. 38.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) sand (d) sawdust
39. 39.⚖️ 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
40. 40.True or false: chalk powder does not dissolve in water. (a) True (b) False

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