Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 361 · 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) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
3. 3.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) melting butter (d) dissolving salt
5. 5.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
6. 6.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) turmeric powder (d) a spoon
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 kind of salt (c) days to see crystals (d) the amount of salt
9. 9.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
10. 10.🧺 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 spoon (d) salt
11. 11.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
12. 12.⚖️ 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) the kind of salt (c) sunny or shady place
13. 13.True or false: salt is needed for growing salt crystals. (a) True (b) False
14. 14.🛟 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
15. 15.True or false: baking soda does not dissolve in water. (a) True (b) False
16. 16.⚖️ 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
17. 17.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
18. 18.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) a piece of string (d) salt
20. 20.True or false: folding paper is a change that cannot be undone. (a) False (b) True
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
22. 22.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
23. 23.⚖️ 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 water
24. 24.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
25. 25.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
26. 26.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) sand (d) table salt
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) a shallow dish (d) a spoon
30. 30.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
31. 31.⚖️ 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 keep it the same (c) we change it
32. 32.True or false: salt is not needed for growing salt crystals. (a) False (b) True
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a spoon (d) a shallow dish
35. 35.⚖️ 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 salt (c) days to see crystals
36. 36.🔍 Which is the odd one out? (a) food colour (b) table salt (c) glucose powder (d) chalk powder
37. 37.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
38. 38.🧂 Which of these does not dissolve in water? (a) small pebbles (b) table salt (c) sugar (d) glucose powder
39. 39.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) glucose powder (d) sawdust
40. 40.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed

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