Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 836 · 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.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a magnet (d) warm water
2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
3. 3.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
5. 5.🔍 Which is the odd one out? (a) food colour (b) sugar (c) baking soda (d) small pebbles
6. 6.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
7. 7.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) rusting iron (d) freezing water
8. 8.True or false: sand dissolves in water. (a) True (b) False
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a spoon (c) warm water (d) a shallow dish
14. 14.⚖️ 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 salt (b) sunny or shady place (c) the same dish (d) the kind of salt
15. 15.⚖️ 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 keep it the same (c) we measure it
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) a spoon (d) a balloon
17. 17.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) sawdust (d) glucose powder
18. 18.True or false: chalk powder does not dissolve in water. (a) False (b) True
19. 19.⚖️ 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
20. 20.🧂 Which of these dissolves in water? (a) sugar (b) chalk powder (c) small pebbles (d) sawdust
21. 21.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
23. 23.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sawdust (d) sugar
24. 24.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
25. 25.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
26. 26.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
27. 27.True or false: melting ice is a change that can be undone. (a) True (b) False
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) warm water (d) a magnet
29. 29.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
30. 30.🧂 Which of these does not dissolve in water? (a) baking soda (b) sand (c) food colour (d) sugar
31. 31.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a battery cell (d) a shallow dish
33. 33.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.True or false: freezing water is a change that can be undone. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a piece of string (d) yeast
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a mirror
37. 37.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
38. 38.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) sawdust (d) table salt
39. 39.True or false: sugar does not dissolve in water. (a) False (b) True
40. 40.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve

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