Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 78 · 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? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
3. 3.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) salt rains down (d) sea water evaporates
4. 4.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) yeast (d) salt
7. 7.🧈 Which of these is a change that can be undone? (a) folding paper (b) browning lemon ink (c) baking a cake (d) rusting iron
8. 8.🔍 Which is the odd one out? (a) sawdust (b) sand (c) chalk powder (d) sugar
9. 9.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) food colour (d) small pebbles
10. 10.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
11. 11.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
12. 12.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
13. 13.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) food colour (d) cooking oil
14. 14.⚖️ 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) days to see crystals (c) sunny or shady place
15. 15.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) food colour (d) small pebbles
17. 17.🧺 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 battery cell (d) salt
18. 18.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
20. 20.True or false: chalk powder dissolves in water. (a) False (b) True
21. 21.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
22. 22.⚖️ 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
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
24. 24.True or false: table salt does not dissolve in water. (a) False (b) True
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) a shallow dish (d) warm water
26. 26.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
28. 28.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
29. 29.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sand (d) sugar
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a piece of string (c) warm water (d) a shallow dish
31. 31.🔍 Which is the odd one out? (a) sugar (b) sand (c) baking soda (d) glucose powder
32. 32.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
33. 33.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) small pebbles (d) sugar
34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) magnetic (d) frozen
35. 35.⚖️ 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 amount of water (d) days to see crystals
36. 36.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) sawdust (d) baking soda
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a balloon (c) salt (d) a spoon
39. 39.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
40. 40.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals

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