Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 814 · 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 piece of string for growing salt crystals? (a) not needed (b) needed
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
3. 3.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
4. 4.True or false: melting butter is a change that can be undone. (a) False (b) True
5. 5.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
6. 6.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) yeast (c) warm water (d) a piece of string
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
8. 8.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) rusting iron (d) dissolving salt
9. 9.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
10. 10.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
11. 11.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
12. 12.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) magnetic (d) saturated
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a battery cell (c) warm water (d) a shallow dish
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) yeast (c) a shallow dish (d) salt
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
17. 17.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) small pebbles (d) glucose powder
18. 18.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a spoon (d) a battery cell
20. 20.⚖️ 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 measure it (c) we keep it the same
21. 21.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) cooking oil (d) sugar
22. 22.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
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 change it (c) we measure it
24. 24.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) milk turning to curd (d) dissolving salt
25. 25.True or false: small pebbles does not dissolve in water. (a) True (b) False
26. 26.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.🔍 Which is the odd one out? (a) sand (b) sugar (c) cooking oil (d) chalk powder
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
29. 29.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
30. 30.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.⚖️ 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
32. 32.True or false: salt is needed for growing salt crystals. (a) False (b) True
33. 33.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
34. 34.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
35. 35.⚖️ 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) sunny or shady place (c) the amount of water (d) the amount of salt
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
37. 37.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.⚖️ 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 salt (b) days to see crystals (c) sunny or shady place
39. 39.True or false: baking a cake is a change that can be undone. (a) True (b) False
40. 40.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) table salt (d) sand

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