Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 388 · 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: days to see crystals is what we measure. (a) True (b) False
2. 2.⚖️ 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
3. 3.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) food colour (d) sand
7. 7.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
8. 8.🧂 Which of these dissolves in water? (a) sugar (b) cooking oil (c) chalk powder (d) sawdust
9. 9.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a balloon (d) a shallow dish
11. 11.True or false: warm water is needed for growing salt crystals. (a) True (b) False
12. 12.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
13. 13.True or false: cooking oil does not dissolve in water. (a) True (b) False
14. 14.True or false: salt is needed for growing salt crystals. (a) False (b) True
15. 15.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) salt (c) a shallow dish (d) a piece of string
17. 17.⚖️ 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 change it (c) we measure it
18. 18.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) cooking oil (d) food colour
19. 19.⚖️ 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
20. 20.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
21. 21.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
22. 22.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
23. 23.⚖️ 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
24. 24.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
25. 25.⚖️ 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) the amount of water (c) sunny or shady place (d) the amount of salt
26. 26.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) dissolving salt (d) cooking an egg
27. 27.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) table salt (d) small pebbles
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) salt (c) a magnet (d) a balloon
29. 29.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) food colour (d) table salt
30. 30.True or false: freezing water is a change that cannot be undone. (a) True (b) False
31. 31.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) a battery cell (d) yeast
33. 33.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) baking a cake (c) freezing water (d) melting ice
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) warm water (d) salt
35. 35.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
37. 37.True or false: folding paper is a change that cannot be undone. (a) True (b) False
38. 38.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
39. 39.🧂 Which of these dissolves in water? (a) glucose powder (b) sawdust (c) small pebbles (d) cooking oil
40. 40.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False

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