Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 922 · 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 kind of salt is what we measure. (a) False (b) True
2. 2.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a mirror
4. 4.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
5. 5.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) cooking an egg (d) browning lemon ink
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a spoon (d) a shallow dish
7. 7.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.True or false: baking soda dissolves in water. (a) True (b) False
9. 9.🔮 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
10. 10.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) food colour (d) glucose powder
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a shallow dish (d) turmeric powder
12. 12.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
13. 13.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
14. 14.⚖️ 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 measure it (b) we keep it the same (c) we change it
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
16. 16.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
17. 17.⚖️ 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
18. 18.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) table salt (d) sand
20. 20.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
21. 21.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) browning lemon ink (d) dissolving salt
22. 22.True or false: dissolving salt is a change that can be undone. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) food colour (b) table salt (c) small pebbles (d) sugar
24. 24.⚖️ 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
25. 25.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a balloon (d) warm water
27. 27.⚖️ 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
28. 28.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) cooking an egg (d) folding paper
29. 29.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
30. 30.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
31. 31.🔍 Which is the odd one out? (a) table salt (b) sugar (c) glucose powder (d) sawdust
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) sunny or shady place (b) the kind of salt (c) days to see crystals (d) the amount of water
33. 33.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) table salt (d) sawdust
34. 34.⚖️ 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) the kind of salt (c) sunny or shady place
35. 35.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
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 what we measure. (a) True (b) False
37. 37.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
38. 38.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
39. 39.True or false: melting butter is a change that can be undone. (a) False (b) True
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a spoon (d) turmeric powder

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