Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 824 · 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) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
2. 2.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a balloon (d) a shallow dish
5. 5.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
6. 6.🧂 Which of these does not dissolve in water? (a) sugar (b) chalk powder (c) baking soda (d) glucose powder
7. 7.⚖️ 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 amount of water (c) sunny or shady place
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) True (b) False
9. 9.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
10. 10.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
11. 11.True or false: a mirror is needed for growing salt crystals. (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 what we measure? (a) the amount of salt (b) the amount of water (c) days to see crystals (d) the same dish
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) yeast (d) warm water
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a balloon (d) salt
16. 16.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) glucose powder (d) food colour
18. 18.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) baking soda (d) sawdust
19. 19.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
20. 20.🔮 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
21. 21.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) sand (d) glucose powder
22. 22.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
23. 23.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) melting butter (d) cooking an egg
24. 24.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) food colour (d) chalk powder
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) salt (d) a mirror
26. 26.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
27. 27.True or false: chalk powder dissolves in water. (a) False (b) True
28. 28.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
29. 29.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
32. 32.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
33. 33.⚖️ 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
34. 34.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) baking a cake (d) rusting iron
35. 35.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) turmeric powder (c) salt (d) warm water
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
38. 38.⚖️ 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 change it (b) we measure it (c) we keep it the same
39. 39.True or false: salt is not needed for growing salt crystals. (a) False (b) True
40. 40.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone

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