Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 960 · 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: days to see crystals is what we measure. (a) False (b) True
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) yeast
3. 3.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a magnet (d) a spoon
6. 6.🧂 Which of these does not dissolve in water? (a) baking soda (b) small pebbles (c) food colour (d) table salt
7. 7.True or false: yeast is needed for growing salt crystals. (a) False (b) True
8. 8.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) table salt (d) sawdust
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a battery cell (d) salt
10. 10.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
11. 11.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
13. 13.True or false: sand does not dissolve in water. (a) False (b) True
14. 14.True or false: table salt does not dissolve in water. (a) True (b) False
15. 15.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) salt (d) a spoon
17. 17.🔮 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
18. 18.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) food colour (d) cooking oil
19. 19.⚖️ 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
20. 20.True or false: baking a cake is a change that can be undone. (a) False (b) True
21. 21.⚖️ 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
22. 22.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.⚖️ 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 measure it (c) we keep it the same
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
25. 25.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a battery cell (d) salt
26. 26.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
27. 27.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
28. 28.🔍 Which is the odd one out? (a) sand (b) sawdust (c) baking soda (d) chalk powder
29. 29.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) food colour (d) chalk powder
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) a piece of string (d) a spoon
32. 32.True or false: rusting iron is a change that can be undone. (a) True (b) False
33. 33.⚖️ 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) sunny or shady place (c) days to see crystals
34. 34.True or false: sugar dissolves in water. (a) False (b) True
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) a piece of string (d) warm water
37. 37.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
38. 38.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) folding paper (d) milk turning to curd
39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) warm water (d) a magnet

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