Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 589 · 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 the one thing we change. (a) False (b) True
2. 2.True or false: glucose powder dissolves in water. (a) True (b) False
3. 3.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
4. 4.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
5. 5.⚖️ 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
6. 6.True or false: table salt does not dissolve in water. (a) False (b) True
7. 7.⚖️ 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
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a battery cell (d) a shallow dish
9. 9.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
10. 10.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
11. 11.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
12. 12.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) sugar (d) glucose powder
13. 13.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
14. 14.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.True or false: cooking an egg is a change that can be undone. (a) True (b) False
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
17. 17.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) a shallow dish (d) salt
20. 20.True or false: chalk powder does not dissolve in water. (a) False (b) True
21. 21.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) sawdust (d) sugar
23. 23.⚖️ 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 salt (c) the kind of salt (d) the amount of water
24. 24.🧂 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
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a spoon (d) yeast
27. 27.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
28. 28.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
29. 29.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) food colour (d) chalk powder
31. 31.⚖️ 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 same dish (b) days to see crystals (c) the kind of salt (d) sunny or shady place
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) turmeric powder (d) a spoon
33. 33.⚖️ 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
34. 34.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
35. 35.⚖️ 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) True (b) False
36. 36.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) sand (d) chalk powder
37. 37.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
39. 39.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
40. 40.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) chalk powder (d) table salt

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