Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 983 · 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.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
2. 2.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
3. 3.True or false: yeast is needed for growing salt crystals. (a) True (b) False
4. 4.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
5. 5.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
6. 6.⚖️ 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
7. 7.🔮 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
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of salt (c) days to see crystals (d) the amount of water
9. 9.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) folding paper (d) freezing water
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
12. 12.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
13. 13.True or false: food colour does not dissolve in water. (a) False (b) True
14. 14.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) food colour (d) sawdust
16. 16.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) chalk powder (d) sawdust
17. 17.🧈 Which of these is a change that can be undone? (a) melting butter (b) rusting iron (c) browning lemon ink (d) cooking an egg
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) yeast (d) a spoon
19. 19.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a battery cell (d) a piece of string
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a battery cell (d) a spoon
22. 22.True or false: freezing water is a change that cannot be undone. (a) False (b) True
23. 23.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) food colour (d) chalk powder
24. 24.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) baking a cake (d) freezing water
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a piece of string (d) a battery cell
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
27. 27.True or false: chalk powder does not dissolve in water. (a) False (b) True
28. 28.True or false: folding paper is a change that can be undone. (a) True (b) False
29. 29.True or false: rusting iron is a change that can be undone. (a) False (b) True
30. 30.⚖️ 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
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
32. 32.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
33. 33.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
34. 34.⚖️ 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 measure it (b) we keep it the same (c) we change it
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a mirror (c) warm water (d) a shallow dish
36. 36.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) baking a cake (d) melting butter
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a shallow dish (d) a piece of string
39. 39.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) fish make it (d) sea water evaporates
40. 40.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone

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