Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 835 · 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? Which of these is what we measure? (a) the same dish (b) days to see crystals (c) the amount of water (d) sunny or shady place
2. 2.True or false: freezing water is a change that cannot be undone. (a) False (b) True
3. 3.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
5. 5.⚖️ 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
6. 6.🧈 Which of these is a change that can be undone? (a) melting butter (b) baking a cake (c) browning lemon ink (d) rusting iron
7. 7.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) cooking an egg (d) baking a cake
9. 9.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a mirror (c) a shallow dish (d) warm water
11. 11.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny spheres (d) tiny stars
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) warm water (d) turmeric powder
13. 13.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) sugar (d) sand
14. 14.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) cooking an egg (d) folding paper
15. 15.⚖️ 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) the amount of salt (c) the amount of water (d) sunny or shady place
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
17. 17.🧂 Which of these dissolves in water? (a) food colour (b) sawdust (c) small pebbles (d) sand
18. 18.True or false: baking soda does not dissolve in water. (a) True (b) False
19. 19.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
20. 20.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
21. 21.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
22. 22.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a shallow dish (d) a battery cell
24. 24.True or false: melting butter is a change that cannot be undone. (a) False (b) True
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
26. 26.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
28. 28.⚖️ 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 salt
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 change it (b) we measure it (c) we keep it the same
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) a spoon (d) salt
31. 31.True or false: sugar does not dissolve in water. (a) False (b) True
32. 32.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
33. 33.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
34. 34.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
35. 35.⚖️ 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) True (b) False
36. 36.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) folding paper (d) milk turning to curd
37. 37.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
38. 38.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) yeast (d) a spoon
40. 40.⚖️ 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

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