Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 549 · 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: dissolving salt is a change that cannot be undone. (a) False (b) True
2. 2.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a piece of string (c) a magnet (d) a mirror
3. 3.⚖️ 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 salt (b) sunny or shady place (c) the kind of salt (d) days to see crystals
4. 4.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
5. 5.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
6. 6.🧂 Which of these dissolves in water? (a) sawdust (b) food colour (c) sand (d) cooking oil
7. 7.🛟 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
8. 8.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) table salt (d) small pebbles
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) salt (d) warm water
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) yeast (d) a battery cell
11. 11.🔮 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
12. 12.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a spoon (d) a balloon
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a balloon (c) a shallow dish (d) warm water
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) yeast (d) turmeric powder
18. 18.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
19. 19.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) small pebbles (d) cooking oil
20. 20.True or false: melting ice is a change that cannot be undone. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) food colour (d) table salt
22. 22.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
24. 24.True or false: melting butter is a change that cannot be undone. (a) True (b) False
25. 25.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
27. 27.True or false: sawdust dissolves in water. (a) True (b) False
28. 28.⚖️ 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) True (b) False
29. 29.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
30. 30.🧈 Which of these is a change that can be undone? (a) baking a cake (b) freezing water (c) rusting iron (d) cooking an egg
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) warm water (d) a shallow dish
32. 32.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) salt (d) a shallow dish
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) warm water (c) yeast (d) a battery cell
35. 35.⚖️ 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
36. 36.True or false: sugar dissolves in water. (a) True (b) False
37. 37.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) sawdust (d) sugar
38. 38.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
39. 39.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) sugar (d) sand
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a mirror (c) salt (d) a spoon

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