Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 595 · 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.🔮 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
2. 2.🧂 Which of these does not dissolve in water? (a) sand (b) table salt (c) sugar (d) baking soda
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
4. 4.True or false: melting butter is a change that cannot be undone. (a) True (b) False
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a spoon (d) yeast
6. 6.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) baking a cake (d) dissolving salt
7. 7.⚖️ 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
8. 8.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) turmeric powder (d) warm water
10. 10.True or false: glucose powder dissolves in water. (a) False (b) True
11. 11.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a mirror (d) a spoon
12. 12.⚖️ 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
13. 13.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
15. 15.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
16. 16.⚖️ 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 salt (d) sunny or shady place
17. 17.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) folding paper (c) milk turning to curd (d) cooking an egg
18. 18.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
19. 19.⚖️ 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 amount of water (b) the same dish (c) sunny or shady place (d) days to see crystals
20. 20.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
21. 21.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) glucose powder (d) sawdust
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) warm water (d) yeast
23. 23.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) melting butter (d) browning lemon ink
24. 24.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a balloon (d) a piece of string
25. 25.True or false: folding paper is a change that can be undone. (a) False (b) True
26. 26.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
27. 27.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) browning lemon ink (d) folding paper
28. 28.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
29. 29.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
30. 30.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) cooking oil (d) sand
31. 31.True or false: freezing water is a change that cannot be undone. (a) True (b) False
32. 32.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
33. 33.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
35. 35.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
36. 36.True or false: sawdust does not dissolve in water. (a) False (b) True
37. 37.True or false: folding paper is a change that cannot be undone. (a) False (b) True
38. 38.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) cooking an egg (d) freezing water
39. 39.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
40. 40.⚖️ 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

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