Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 193 · 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 a change that cannot be undone? (a) melting ice (b) melting butter (c) milk turning to curd (d) dissolving salt
2. 2.⚖️ 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) the kind of salt (d) the same dish
3. 3.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) dissolving salt (d) cooking an egg
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) a shallow dish (d) a piece of string
6. 6.True or false: table salt dissolves in water. (a) False (b) True
7. 7.True or false: sawdust dissolves in water. (a) True (b) False
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
10. 10.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
11. 11.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a shallow dish (d) a piece of string
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) a spoon (d) salt
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.True or false: warm water is needed for growing salt crystals. (a) True (b) False
18. 18.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a shallow dish (c) a balloon (d) turmeric powder
19. 19.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.⚖️ 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 measure it (b) we change it (c) we keep it the same
21. 21.🧂 Which of these does not dissolve in water? (a) sugar (b) sand (c) glucose powder (d) table salt
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🔍 Which is the odd one out? (a) food colour (b) sugar (c) sand (d) glucose powder
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a spoon (d) turmeric powder
26. 26.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) small pebbles (d) food colour
27. 27.True or false: salt is not needed for growing salt crystals. (a) False (b) True
28. 28.True or false: food colour dissolves in water. (a) True (b) False
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) salt (d) a battery cell
30. 30.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) baking soda (d) food colour
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
32. 32.True or false: salt is needed for growing salt crystals. (a) False (b) True
33. 33.🧺 Do we need a piece of string 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? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the same dish
35. 35.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
37. 37.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
39. 39.⚖️ 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 measure it (b) we change it (c) we keep it the same
40. 40.True or false: folding paper is a change that can be undone. (a) False (b) True

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