Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 201 · 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 of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) cooking an egg (d) melting ice
2. 2.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
3. 3.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
4. 4.⚖️ 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 water (b) the amount of salt (c) sunny or shady place (d) the kind of salt
5. 5.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
6. 6.True or false: chalk powder dissolves in water. (a) True (b) False
7. 7.True or false: folding paper is a change that can be undone. (a) False (b) True
8. 8.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) browning lemon ink (d) folding paper
9. 9.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.True or false: cooking oil does not dissolve in water. (a) False (b) True
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) warm water (d) a piece of string
12. 12.🧂 Which of these dissolves in water? (a) baking soda (b) sand (c) chalk powder (d) small pebbles
13. 13.🛟 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
14. 14.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) sand (d) small pebbles
15. 15.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
16. 16.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) freezing water
17. 17.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
19. 19.True or false: baking soda dissolves in water. (a) False (b) True
20. 20.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
21. 21.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
23. 23.True or false: folding paper is a change that cannot be undone. (a) True (b) False
24. 24.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) milk turning to curd (d) dissolving salt
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a piece of string (c) a mirror (d) yeast
26. 26.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.True or false: yeast is needed for growing salt crystals. (a) False (b) True
28. 28.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) baking a cake (d) dissolving salt
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals
30. 30.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
31. 31.⚖️ 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
32. 32.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
33. 33.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
34. 34.True or false: small pebbles does not dissolve in water. (a) True (b) False
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) salt (c) a piece of string (d) warm water
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a shallow dish (d) a piece of string
38. 38.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) warm water (d) a balloon
40. 40.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) small pebbles (d) glucose powder

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