Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 109 · 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.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
3. 3.🔍 Which is the odd one out? (a) small pebbles (b) food colour (c) glucose powder (d) sugar
4. 4.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) sugar (d) sawdust
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) a balloon
6. 6.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) chalk powder (d) small pebbles
7. 7.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) salt (c) a piece of string (d) warm water
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
10. 10.True or false: freezing water is a change that can be undone. (a) False (b) True
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a mirror (c) a shallow dish (d) a spoon
12. 12.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) browning lemon ink (c) dissolving salt (d) freezing water
13. 13.⚖️ 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 water (b) days to see crystals (c) sunny or shady place (d) the amount of salt
14. 14.🔍 Which is the odd one out? (a) table salt (b) sugar (c) food colour (d) sand
15. 15.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
16. 16.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) baking soda (d) chalk powder
17. 17.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
19. 19.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
20. 20.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) table salt (d) glucose powder
21. 21.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) cooking oil (d) food colour
22. 22.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a shallow dish (d) a balloon
25. 25.⚖️ 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) sunny or shady place (b) the kind of salt (c) days to see crystals (d) the amount of water
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
29. 29.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) glucose powder (d) sand
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) a mirror (d) a magnet
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
32. 32.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
33. 33.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
34. 34.⚖️ 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 change it (b) we measure it (c) we keep it the same
35. 35.🧺 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 battery cell (d) salt
36. 36.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) baking soda (d) sand
37. 37.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) milk turning to curd (d) melting ice
38. 38.True or false: dissolving salt is a change that can be undone. (a) False (b) True
39. 39.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) small pebbles (d) sand

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