Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 420 · 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.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
2. 2.True or false: sugar does not dissolve in water. (a) False (b) True
3. 3.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) cooking oil (d) small pebbles
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) a mirror
5. 5.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
6. 6.True or false: cooking oil does not dissolve in water. (a) False (b) True
7. 7.True or false: melting butter is a change that cannot be undone. (a) True (b) False
8. 8.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
9. 9.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting ice (c) folding paper (d) dissolving salt
10. 10.True or false: glucose powder does not dissolve in water. (a) True (b) False
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a shallow dish (d) a battery cell
12. 12.⚖️ 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 kind of salt
13. 13.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
14. 14.True or false: baking a cake is a change that can be undone. (a) False (b) True
15. 15.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny spheres (d) tiny stars
16. 16.True or false: sand does not dissolve in water. (a) False (b) True
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.⚖️ 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
20. 20.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) sand (d) baking soda
21. 21.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) dissolving salt (c) cooking an egg (d) milk turning to curd
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a magnet (c) yeast (d) a balloon
23. 23.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
24. 24.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
25. 25.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.⚖️ 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) days to see crystals (c) sunny or shady place (d) the same dish
27. 27.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) melting ice (d) dissolving salt
28. 28.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
29. 29.⚖️ 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) False (b) True
30. 30.🔍 Which is the odd one out? (a) food colour (b) sand (c) chalk powder (d) cooking oil
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) cooking an egg (d) freezing water
33. 33.🧈 Which of these is a change that can be undone? (a) rusting iron (b) folding paper (c) browning lemon ink (d) milk turning to curd
34. 34.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
35. 35.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
36. 36.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
37. 37.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.True or false: warm water is not needed for growing salt crystals. (a) True (b) False

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