Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 223 · 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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
3. 3.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) sawdust (d) baking soda
4. 4.True or false: sand does not dissolve in water. (a) False (b) True
5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
6. 6.🧂 Which of these does not dissolve in water? (a) sugar (b) chalk powder (c) glucose powder (d) food colour
7. 7.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
8. 8.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
10. 10.⚖️ 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) True (b) False
11. 11.🧈 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
12. 12.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) turmeric powder (c) a spoon (d) warm water
14. 14.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.⚖️ 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
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
18. 18.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) fish make it (d) sand is ground up
19. 19.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
21. 21.True or false: folding paper is a change that cannot be undone. (a) False (b) True
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) salt (c) warm water (d) a piece of string
23. 23.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) table salt (d) baking soda
24. 24.True or false: food colour does not dissolve in water. (a) True (b) False
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 the one thing we change. (a) True (b) False
26. 26.⚖️ 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 kind of salt (b) sunny or shady place (c) the same dish (d) the amount of salt
27. 27.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) table salt (d) chalk powder
28. 28.🧂 Which of these dissolves in water? (a) glucose powder (b) chalk powder (c) sand (d) sawdust
29. 29.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🧂 Which of these dissolves in water? (a) small pebbles (b) sugar (c) sawdust (d) sand
31. 31.🧂 Which of these does not dissolve in water? (a) small pebbles (b) table salt (c) sugar (d) glucose powder
32. 32.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
33. 33.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) freezing water (c) melting ice (d) folding paper
34. 34.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) chalk powder (d) baking soda
35. 35.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a battery cell (c) salt (d) a shallow dish
37. 37.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
38. 38.True or false: yeast is needed for growing salt crystals. (a) False (b) True
39. 39.🛟 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
40. 40.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone

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