Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 990 · 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 measure it (b) we change it (c) we keep it the same
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) a mirror
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a magnet (c) salt (d) a shallow dish
4. 4.⚖️ 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) False (b) True
5. 5.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
6. 6.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a spoon (d) yeast
8. 8.⚖️ 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
9. 9.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
10. 10.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) rusting iron (d) melting butter
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
12. 12.🛟 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
13. 13.⚖️ 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 keep it the same (b) we measure it (c) we change it
14. 14.True or false: freezing water is a change that cannot be undone. (a) False (b) True
15. 15.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) chalk powder (d) sugar
18. 18.True or false: sawdust dissolves in water. (a) True (b) False
19. 19.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
21. 21.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a battery cell (d) yeast
23. 23.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) salt (d) a piece of string
25. 25.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
26. 26.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.True or false: melting butter is a change that can be undone. (a) False (b) True
28. 28.⚖️ 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
29. 29.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) baking soda (d) food colour
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) turmeric powder (d) a spoon
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) turmeric powder (d) warm water
32. 32.⚖️ 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 amount of water
33. 33.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) baking soda (d) cooking oil
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny spheres (d) tiny triangles
35. 35.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) cooking oil (d) baking soda
38. 38.⚖️ 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 same dish (b) the amount of salt (c) the kind of salt (d) sunny or shady place
39. 39.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
40. 40.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed

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