Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 754 · 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: chalk powder does not dissolve in water. (a) False (b) True
2. 2.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
6. 6.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
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 water”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
9. 9.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) baking soda (d) small pebbles
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a magnet (c) a spoon (d) warm water
11. 11.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
12. 12.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
13. 13.True or false: table salt does not dissolve in water. (a) False (b) True
14. 14.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) sand (d) small pebbles
15. 15.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) milk turning to curd (d) melting butter
16. 16.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) browning lemon ink (d) dissolving salt
17. 17.🧺 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
18. 18.⚖️ 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 kind of salt (b) days to see crystals (c) the amount of salt (d) sunny or shady place
19. 19.⚖️ 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) True (b) False
20. 20.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
21. 21.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.⚖️ 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 keep it the same (c) we measure it
23. 23.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a piece of string (c) a battery cell (d) a mirror
24. 24.⚖️ 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
25. 25.🧂 Which of these does not dissolve in water? (a) chalk powder (b) baking soda (c) food colour (d) sugar
26. 26.⚖️ 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 measure it (b) we change it (c) we keep it the same
27. 27.🧂 Which of these does not dissolve in water? (a) cooking oil (b) sugar (c) glucose powder (d) baking soda
28. 28.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
29. 29.⚖️ 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) True (b) False
30. 30.True or false: freezing water is a change that can be undone. (a) True (b) False
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 what we measure. (a) False (b) True
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
33. 33.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
35. 35.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
36. 36.🔮 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
37. 37.⚖️ 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
38. 38.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) sand (d) glucose powder
39. 39.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone

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