Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 987 · 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.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
2. 2.True or false: freezing water is a change that can be undone. (a) True (b) False
3. 3.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) warm water (c) a spoon (d) a shallow dish
5. 5.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
6. 6.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a shallow dish (d) a magnet
7. 7.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
8. 8.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to change its colour (d) to cool the water
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a shallow dish (d) salt
11. 11.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) chalk powder (d) sand
12. 12.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) small pebbles (d) sand
13. 13.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) magnetic (d) frozen
14. 14.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
15. 15.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) table salt (d) small pebbles
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
17. 17.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.⚖️ 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) days to see crystals (c) sunny or shady place (d) the kind of salt
19. 19.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
20. 20.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
22. 22.🧂 Which of these dissolves in water? (a) food colour (b) sand (c) sawdust (d) cooking oil
23. 23.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
24. 24.True or false: cooking oil does not dissolve in water. (a) True (b) False
25. 25.⚖️ 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
26. 26.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
27. 27.True or false: food colour does not dissolve in water. (a) False (b) True
28. 28.⚖️ 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) days to see crystals (c) sunny or shady place
29. 29.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) sand (d) baking soda
30. 30.True or false: baking soda dissolves in water. (a) False (b) True
31. 31.⚖️ 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
32. 32.True or false: yeast is needed for growing salt crystals. (a) False (b) True
33. 33.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
35. 35.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) turmeric powder (d) warm water
38. 38.True or false: small pebbles does not dissolve in water. (a) False (b) True
39. 39.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) glucose powder (d) cooking oil
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a spoon (c) a magnet (d) turmeric powder

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