Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 514 · 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.🔮 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
2. 2.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) turmeric powder (d) warm water
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
4. 4.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
5. 5.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
7. 7.⚖️ 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
8. 8.🧂 Which of these does not dissolve in water? (a) sand (b) food colour (c) sugar (d) baking soda
9. 9.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) food colour (d) small pebbles
10. 10.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) cooking an egg (d) milk turning to curd
11. 11.⚖️ 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
12. 12.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
13. 13.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.🔍 Which is the odd one out? (a) sawdust (b) sand (c) chalk powder (d) baking soda
16. 16.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) salt (c) a piece of string (d) a shallow dish
18. 18.🔍 Which is the odd one out? (a) food colour (b) sugar (c) baking soda (d) sand
19. 19.⚖️ 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 amount of water (b) days to see crystals (c) the amount of salt (d) the same dish
20. 20.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) salt (d) a mirror
23. 23.True or false: sawdust dissolves in water. (a) True (b) False
24. 24.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) a mirror (d) a spoon
26. 26.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
27. 27.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) baking a cake (d) melting ice
28. 28.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) a shallow dish (d) a spoon
30. 30.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) a shallow dish (d) salt
32. 32.⚖️ 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) True (b) False
33. 33.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
34. 34.🧈 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
35. 35.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.⚖️ 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
38. 38.True or false: rusting iron is a change that can be undone. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) chalk powder (d) food colour
40. 40.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals

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