Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 593 · 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 kept the same? (a) the amount of water (b) sunny or shady place (c) days to see crystals
2. 2.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
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 measure it (b) we keep it the same (c) we change it
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
5. 5.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
7. 7.⚖️ 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
8. 8.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) table salt (d) food colour
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.⚖️ 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 amount of salt (c) the amount of water (d) days to see crystals
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) warm water (d) a shallow dish
14. 14.True or false: chalk powder dissolves in water. (a) True (b) False
15. 15.True or false: folding paper is a change that cannot be undone. (a) True (b) False
16. 16.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
17. 17.True or false: baking soda dissolves in water. (a) True (b) False
18. 18.True or false: baking soda does not dissolve in water. (a) True (b) False
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a spoon (c) salt (d) warm water
20. 20.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) melting ice (d) baking a cake
21. 21.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
22. 22.🧂 Which of these dissolves in water? (a) food colour (b) sand (c) cooking oil (d) small pebbles
23. 23.⚖️ 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) sunny or shady place (c) the amount of salt (d) the same dish
24. 24.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) table salt (d) food colour
25. 25.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) table salt (d) sawdust
26. 26.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) sand (d) sawdust
28. 28.⚖️ 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 change it (c) we keep it the same
29. 29.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a mirror (c) a balloon (d) a battery cell
30. 30.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
31. 31.⚖️ 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) False (b) True
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
34. 34.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
35. 35.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) glucose powder (d) small pebbles
37. 37.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
38. 38.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) glucose powder (d) cooking oil
39. 39.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.True or false: warm water is not needed for growing salt crystals. (a) False (b) True

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