Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 641 · 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: melting ice is a change that cannot be undone. (a) False (b) True
2. 2.🧂 Which of these does not dissolve in water? (a) food colour (b) chalk powder (c) table salt (d) glucose powder
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a shallow dish (c) warm water (d) a spoon
4. 4.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
5. 5.True or false: sawdust dissolves in water. (a) True (b) False
6. 6.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
7. 7.⚖️ 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) the kind of salt (c) sunny or shady place (d) days to see crystals
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a spoon (d) yeast
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
11. 11.⚖️ 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
12. 12.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) warm water (d) a balloon
13. 13.⚖️ 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
14. 14.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
15. 15.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
16. 16.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a magnet (c) salt (d) a piece of string
19. 19.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) small pebbles (d) baking soda
20. 20.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
21. 21.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) chalk powder (d) table salt
22. 22.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
23. 23.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
24. 24.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) sugar (d) small pebbles
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) turmeric powder (c) warm water (d) a spoon
27. 27.⚖️ 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 salt (b) sunny or shady place (c) days to see crystals (d) the amount of water
28. 28.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the kind of salt
30. 30.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) sugar (d) small pebbles
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a spoon (d) a battery cell
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
33. 33.True or false: rusting iron is a change that can be undone. (a) False (b) True
34. 34.True or false: cooking oil does not dissolve in water. (a) False (b) True
35. 35.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) rusting iron (d) cooking an egg
36. 36.⚖️ 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
37. 37.⚖️ 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) False (b) True
38. 38.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.⚖️ 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) sunny or shady place (c) the same dish
40. 40.True or false: yeast is needed for growing salt crystals. (a) True (b) False

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