Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 812 · 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.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) salt (d) yeast
3. 3.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) dissolving salt (c) melting butter (d) melting ice
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a shallow dish (d) yeast
5. 5.⚖️ 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
6. 6.🔍 Which is the odd one out? (a) sugar (b) table salt (c) chalk powder (d) glucose powder
7. 7.True or false: glucose powder does not dissolve in water. (a) False (b) True
8. 8.⚖️ 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) days to see crystals (b) the kind of salt (c) the same dish (d) sunny or shady place
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) yeast (d) a piece of string
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
12. 12.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
13. 13.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
15. 15.True or false: baking a cake is a change that can be undone. (a) True (b) False
16. 16.⚖️ 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) days to see crystals (c) the same dish
17. 17.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
18. 18.True or false: baking soda dissolves in water. (a) True (b) False
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
20. 20.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
21. 21.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) days to see crystals (c) the amount of salt (d) the same dish
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
24. 24.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
25. 25.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
26. 26.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) baking a cake (d) folding paper
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a mirror (d) salt
28. 28.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
29. 29.⚖️ 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
30. 30.True or false: freezing water is a change that can be undone. (a) False (b) True
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a balloon (d) yeast
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) table salt (b) food colour (c) glucose powder (d) sand
34. 34.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
35. 35.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
37. 37.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) cooking oil (d) sawdust
38. 38.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a mirror (c) a shallow dish (d) warm water

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