Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 770 · 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.True or false: glucose powder dissolves in water. (a) True (b) False
2. 2.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) folding paper (d) cooking an egg
3. 3.True or false: cooking an egg is a change that can be undone. (a) True (b) False
4. 4.True or false: table salt dissolves in water. (a) True (b) False
5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
6. 6.🧂 Which of these dissolves in water? (a) sugar (b) chalk powder (c) cooking oil (d) small pebbles
7. 7.⚖️ 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
8. 8.True or false: sugar dissolves in water. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) food colour (b) sugar (c) baking soda (d) sand
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a piece of string (d) a battery cell
11. 11.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
12. 12.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) folding paper (d) melting ice
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
14. 14.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
15. 15.True or false: glucose powder does not dissolve in water. (a) True (b) False
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) a piece of string (d) salt
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
20. 20.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
21. 21.⚖️ 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
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) salt (d) a shallow dish
23. 23.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) glucose powder (d) sugar
24. 24.⚖️ 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 water (b) the kind of salt (c) the same dish (d) sunny or shady place
25. 25.True or false: cooking oil does not dissolve in water. (a) False (b) True
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) turmeric powder (d) a piece of string
27. 27.⚖️ 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) the amount of water (c) days to see crystals
28. 28.🧂 Which of these does not dissolve in water? (a) sand (b) glucose powder (c) food colour (d) baking soda
29. 29.⚖️ 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 amount of salt (c) sunny or shady place
30. 30.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
31. 31.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
33. 33.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
34. 34.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.True or false: melting ice is a change that can be undone. (a) False (b) True
38. 38.True or false: sugar does not dissolve in water. (a) True (b) False
39. 39.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
40. 40.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve

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