Salt Crystal Experiment Worksheet

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

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