Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 748 · 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.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) sugar (d) cooking oil
2. 2.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
3. 3.⚖️ 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 measure it (b) we keep it the same (c) we change it
4. 4.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
5. 5.True or false: sand dissolves in water. (a) True (b) False
6. 6.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
7. 7.True or false: freezing water is a change that cannot be undone. (a) True (b) False
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
9. 9.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
10. 10.🧂 Does baking soda 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? True or false: the amount of salt is what we measure. (a) True (b) False
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of water (b) sunny or shady place (c) days to see crystals
13. 13.⚖️ 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 amount of water (c) days to see crystals (d) the kind of salt
14. 14.True or false: food colour does not dissolve in water. (a) True (b) False
15. 15.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
17. 17.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) baking soda (d) chalk powder
18. 18.🧈 Which of these is a change that can be undone? (a) melting ice (b) rusting iron (c) milk turning to curd (d) cooking an egg
19. 19.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
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 amount of water (b) the kind of salt (c) sunny or shady place (d) the same dish
22. 22.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) chalk powder (d) food colour
23. 23.True or false: melting butter is a change that cannot be undone. (a) False (b) True
24. 24.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a piece of string (c) a spoon (d) warm water
26. 26.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a piece of string (d) salt
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a piece of string (c) salt (d) warm water
29. 29.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) sugar (d) chalk powder
30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
31. 31.True or false: warm water is needed for growing salt crystals. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) baking soda (d) sand
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a piece of string (c) warm water (d) salt
34. 34.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
35. 35.True or false: melting butter is a change that can be undone. (a) False (b) True
36. 36.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) salt rains down (d) sea water evaporates
37. 37.True or false: baking soda does not dissolve in water. (a) False (b) True
38. 38.🧈 Which of these is a change that can be undone? (a) rusting iron (b) folding paper (c) cooking an egg (d) milk turning to curd
39. 39.True or false: sawdust dissolves in water. (a) True (b) False
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False

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