Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 914 · 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 dissolves in water? (a) sugar (b) small pebbles (c) sawdust (d) sand
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a piece of string (d) yeast
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.True or false: warm water is needed for growing salt crystals. (a) True (b) False
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a shallow dish (d) yeast
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) a shallow dish (d) a spoon
8. 8.⚖️ 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) True (b) False
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
10. 10.⚖️ 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 measure it (c) we change it
11. 11.🧂 Which of these does not dissolve in water? (a) sand (b) glucose powder (c) baking soda (d) table salt
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
13. 13.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) browning lemon ink (d) dissolving salt
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) a spoon (d) a piece of string
15. 15.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
17. 17.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
18. 18.🧂 Which of these dissolves in water? (a) small pebbles (b) table salt (c) sand (d) chalk powder
19. 19.True or false: small pebbles dissolves in water. (a) False (b) True
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a balloon (d) a shallow dish
21. 21.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) dissolving salt (d) melting ice
22. 22.🔮 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
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
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 measure it (b) we keep it the same (c) we change it
25. 25.⚖️ 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 measure it (b) we keep it the same (c) we change it
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the kind of salt (c) the amount of salt (d) the amount of water
27. 27.⚖️ 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) the amount of water (c) days to see crystals
28. 28.⚖️ 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
29. 29.🔍 Which is the odd one out? (a) baking soda (b) sand (c) table salt (d) glucose powder
30. 30.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
31. 31.True or false: freezing water is a change that cannot be undone. (a) True (b) False
32. 32.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
33. 33.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) cooking oil (d) sugar
35. 35.True or false: baking soda dissolves in water. (a) True (b) False
36. 36.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
37. 37.⚖️ 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) False (b) True
38. 38.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) turmeric powder (d) a spoon
39. 39.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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