Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 298 · 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.⚖️ 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
2. 2.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) a mirror (d) salt
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a mirror (d) a piece of string
4. 4.True or false: baking soda dissolves in water. (a) False (b) True
5. 5.⚖️ 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
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a piece of string (c) salt (d) warm water
8. 8.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
9. 9.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) cooking oil (d) glucose powder
10. 10.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) cooking oil (d) food colour
11. 11.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) milk turning to curd (c) melting ice (d) dissolving salt
12. 12.🔮 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
13. 13.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
14. 14.⚖️ 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 measure it (b) we keep it the same (c) we change it
15. 15.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
16. 16.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) sand (d) chalk powder
17. 17.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: glucose powder does not dissolve in water. (a) True (b) False
19. 19.⚖️ 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 amount of water (b) sunny or shady place (c) the kind of salt (d) days to see crystals
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
21. 21.True or false: salt is needed for growing salt crystals. (a) True (b) False
22. 22.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
23. 23.⚖️ 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 kind of salt (c) sunny or shady place
24. 24.True or false: small pebbles dissolves in water. (a) False (b) True
25. 25.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.True or false: a battery cell is not needed for growing salt crystals. (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 what we measure? (a) the amount of water (b) the same dish (c) days to see crystals (d) the kind of salt
29. 29.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) milk turning to curd (d) melting ice
30. 30.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sawdust (d) glucose powder
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) salt (c) a shallow dish (d) a piece of string
32. 32.🧂 Which of these does not dissolve in water? (a) glucose powder (b) chalk powder (c) baking soda (d) table salt
33. 33.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
34. 34.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
35. 35.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting butter (c) melting ice (d) dissolving salt
36. 36.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
37. 37.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
38. 38.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
39. 39.🧂 Which of these does not dissolve in water? (a) food colour (b) sand (c) sugar (d) glucose powder
40. 40.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres

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