Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 366 · 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: freezing water is a change that cannot be undone. (a) False (b) True
2. 2.🧂 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
3. 3.True or false: sugar dissolves in water. (a) False (b) True
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a piece of string (d) a mirror
6. 6.True or false: small pebbles dissolves in water. (a) True (b) False
7. 7.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) table salt (d) small pebbles
8. 8.🧂 Which of these does not dissolve in water? (a) food colour (b) sand (c) baking soda (d) table salt
9. 9.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) salt (d) a magnet
11. 11.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) dissolving salt (c) melting ice (d) folding paper
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
13. 13.⚖️ 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
14. 14.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) baking soda (d) small pebbles
15. 15.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) food colour (d) cooking oil
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a shallow dish (d) a battery cell
17. 17.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
19. 19.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
20. 20.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting butter (c) cooking an egg (d) milk turning to curd
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 keep it the same (b) we change it (c) we measure it
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a spoon (c) a shallow dish (d) salt
23. 23.True or false: dissolving salt is a change that can be undone. (a) False (b) True
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a piece of string (c) salt (d) warm water
26. 26.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) food colour (d) chalk powder
27. 27.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
28. 28.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
29. 29.⚖️ 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
30. 30.True or false: cooking oil does not dissolve in water. (a) False (b) True
31. 31.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
33. 33.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
34. 34.⚖️ 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 kind of salt (b) the same dish (c) the amount of water (d) sunny or shady place
35. 35.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) table salt (d) cooking oil
36. 36.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) small pebbles (d) sugar
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) warm water (d) a magnet
38. 38.⚖️ 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 kind of salt (c) days to see crystals
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the amount of water (d) the kind of salt
40. 40.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) milk turning to curd (d) folding paper

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