Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 892 · 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.⚖️ 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
2. 2.True or false: salt is not needed for growing salt crystals. (a) False (b) True
3. 3.⚖️ 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 change it (b) we keep it the same (c) we measure it
4. 4.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
5. 5.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
8. 8.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
9. 9.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
11. 11.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
14. 14.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) small pebbles (d) baking soda
16. 16.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) melting ice (d) rusting iron
17. 17.⚖️ 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
18. 18.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) melting butter (d) baking a cake
19. 19.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a magnet (d) a piece of string
21. 21.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
22. 22.🧂 Which of these does not dissolve in water? (a) sugar (b) chalk powder (c) food colour (d) baking soda
23. 23.True or false: cooking oil does not dissolve in water. (a) True (b) False
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a shallow dish (c) a piece of string (d) salt
25. 25.True or false: melting ice is a change that cannot be undone. (a) True (b) False
26. 26.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
27. 27.🔍 Which is the odd one out? (a) sawdust (b) sand (c) food colour (d) chalk powder
28. 28.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
29. 29.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
30. 30.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
32. 32.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) food colour (d) chalk powder
33. 33.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
34. 34.True or false: folding paper is a change that cannot be undone. (a) False (b) True
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 same dish (c) days to see crystals
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) warm water (d) a balloon
38. 38.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
39. 39.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
40. 40.⚖️ 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 keep it the same (b) we measure it (c) we change it

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