Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 961 · 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? What do we do with “the kind of salt”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🔍 Which is the odd one out? (a) sugar (b) food colour (c) chalk powder (d) baking soda
3. 3.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) sugar (d) cooking oil
5. 5.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
6. 6.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) table salt (d) sugar
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a balloon (d) a shallow dish
9. 9.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
10. 10.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
11. 11.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
12. 12.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
13. 13.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
14. 14.⚖️ 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 kind of salt (b) the amount of water (c) days to see crystals (d) the same dish
15. 15.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
16. 16.⚖️ 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) False (b) True
17. 17.True or false: baking soda does not dissolve in water. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) sugar (b) food colour (c) glucose powder (d) sawdust
19. 19.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) salt (d) warm water
21. 21.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
22. 22.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
23. 23.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
24. 24.⚖️ 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
25. 25.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) a piece of string (d) warm water
27. 27.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) browning lemon ink (d) melting butter
28. 28.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) sand (d) table salt
29. 29.True or false: melting ice is a change that can be undone. (a) False (b) True
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a piece of string (d) a spoon
31. 31.True or false: freezing water is a change that cannot be undone. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) salt (d) a shallow dish
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 salt (b) sunny or shady place (c) days to see crystals
34. 34.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) yeast (d) a magnet
36. 36.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
37. 37.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
38. 38.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
39. 39.⚖️ 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 amount of water (c) the same dish (d) the kind of salt
40. 40.True or false: table salt does not dissolve in water. (a) True (b) False

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