Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 704 · 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.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
2. 2.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) table salt (d) cooking oil
3. 3.⚖️ 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
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (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 kind of salt is what we measure. (a) False (b) True
6. 6.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
7. 7.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) warm water (c) a piece of string (d) a spoon
9. 9.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
10. 10.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
11. 11.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) salt (c) a piece of string (d) a shallow dish
13. 13.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) warm water (c) salt (d) a shallow dish
15. 15.True or false: melting ice is a change that can be undone. (a) False (b) True
16. 16.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) warm water (d) salt
18. 18.🛟 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
19. 19.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
20. 20.True or false: chalk powder dissolves in water. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) sawdust (d) table salt
22. 22.⚖️ 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) days to see crystals (b) the amount of salt (c) sunny or shady place (d) the same dish
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
24. 24.⚖️ 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
25. 25.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) fish make it (d) salt rains down
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) a battery cell (d) yeast
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) a mirror (d) a shallow dish
28. 28.⚖️ 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) True (b) False
29. 29.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) folding paper (c) dissolving salt (d) melting butter
31. 31.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) browning lemon ink (d) baking a cake
32. 32.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
33. 33.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
34. 34.True or false: freezing water is a change that cannot be undone. (a) True (b) False
35. 35.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
36. 36.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
37. 37.🧂 Which of these dissolves in water? (a) baking soda (b) sand (c) cooking oil (d) small pebbles
38. 38.⚖️ 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
39. 39.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) sand (d) table salt
40. 40.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting ice (c) melting butter (d) dissolving salt

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