Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 583 · 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 kind of salt is the one thing we change. (a) True (b) False
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
3. 3.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) melting ice (d) browning lemon ink
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
5. 5.True or false: glucose powder does not dissolve in water. (a) False (b) True
6. 6.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic
7. 7.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
9. 9.True or false: rusting iron is a change that can be undone. (a) True (b) False
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) warm water (d) yeast
11. 11.True or false: food colour dissolves in water. (a) False (b) True
12. 12.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) yeast (d) warm water
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a spoon (d) a magnet
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a piece of string (d) a balloon
16. 16.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
17. 17.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) glucose powder (d) chalk powder
18. 18.True or false: baking soda dissolves in water. (a) False (b) True
19. 19.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a balloon (d) a spoon
21. 21.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
22. 22.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
24. 24.True or false: freezing water is a change that can be undone. (a) True (b) False
25. 25.⚖️ 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) True (b) False
26. 26.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
27. 27.⚖️ 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 amount of salt (b) sunny or shady place (c) the kind of salt (d) the same dish
28. 28.True or false: table salt does not dissolve in water. (a) True (b) False
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 water”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
31. 31.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.⚖️ 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 measure it (c) we keep it the same
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a mirror (d) warm water
34. 34.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) small pebbles (d) glucose powder
35. 35.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) table salt (d) sawdust
36. 36.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) sand (d) sawdust
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a piece of string (c) a magnet (d) a battery cell
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
40. 40.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water

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