Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 872 · 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.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sugar (d) sawdust
2. 2.⚖️ 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) sunny or shady place (b) the kind of salt (c) days to see crystals (d) the amount of water
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
5. 5.True or false: table salt does not dissolve in water. (a) True (b) False
6. 6.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
7. 7.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) cooking an egg (d) folding paper
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
10. 10.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
11. 11.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) freezing water (c) folding paper (d) melting butter
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) turmeric powder (d) warm water
13. 13.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) cooking an egg (d) rusting iron
14. 14.🔍 Which is the odd one out? (a) sugar (b) table salt (c) sand (d) food colour
15. 15.⚖️ 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
16. 16.True or false: cooking an egg is a change that can be undone. (a) False (b) True
17. 17.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) food colour (d) sand
18. 18.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
19. 19.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a mirror (d) warm water
22. 22.True or false: freezing water is a change that cannot be undone. (a) False (b) True
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a balloon (d) warm water
24. 24.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
25. 25.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
26. 26.⚖️ 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) the amount of water (c) the amount of salt (d) the same dish
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a battery cell (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 same dish is what we measure. (a) True (b) False
29. 29.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
30. 30.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) melting butter (d) rusting iron
31. 31.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) baking soda (d) sand
32. 32.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) cooking oil (d) glucose powder
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) days to see crystals (c) sunny or shady place
35. 35.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
36. 36.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
37. 37.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) dissolving salt (d) folding paper
39. 39.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) cooking oil (d) glucose powder
40. 40.True or false: yeast is needed for growing salt crystals. (a) False (b) True

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