Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 813 · 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.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
3. 3.True or false: baking soda does not dissolve in water. (a) True (b) False
4. 4.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
5. 5.⚖️ 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 measure it (c) we change it
6. 6.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
7. 7.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
9. 9.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
11. 11.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) cooking oil (d) small pebbles
12. 12.True or false: glucose powder does not dissolve in water. (a) False (b) True
13. 13.⚖️ 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 keep it the same (b) we change it (c) we measure it
14. 14.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a spoon (d) turmeric powder
16. 16.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) browning lemon ink (d) milk turning to curd
17. 17.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a piece of string (d) a magnet
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
20. 20.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
21. 21.⚖️ 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 change it (b) we keep it the same (c) we measure it
22. 22.True or false: freezing water is a change that can be undone. (a) False (b) True
23. 23.⚖️ 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 measure it (c) we change it
24. 24.⚖️ 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 amount of salt (c) the same dish (d) sunny or shady place
25. 25.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
26. 26.🔍 Which is the odd one out? (a) sugar (b) table salt (c) sawdust (d) glucose powder
27. 27.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) a piece of string (d) salt
29. 29.True or false: food colour dissolves in water. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) table salt (d) small pebbles
31. 31.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a piece of string (c) a battery cell (d) yeast
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) salt (d) yeast
34. 34.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
37. 37.🧂 Which of these does not dissolve in water? (a) food colour (b) sand (c) table salt (d) glucose powder
38. 38.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) sugar (d) small pebbles
39. 39.🧂 Which of these dissolves in water? (a) sawdust (b) baking soda (c) cooking oil (d) small pebbles
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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