Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 908 · 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 glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
5. 5.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
6. 6.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.True or false: melting ice is a change that can be undone. (a) True (b) False
8. 8.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) folding paper (d) freezing water
9. 9.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
11. 11.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) warm water (d) salt
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
14. 14.⚖️ 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) the same dish (c) sunny or shady place (d) days to see crystals
15. 15.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.⚖️ 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
18. 18.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) baking soda (d) sawdust
19. 19.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
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) turmeric powder (d) a shallow dish
21. 21.⚖️ 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 measure it (b) we keep it the same (c) we change it
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a shallow dish (d) a mirror
23. 23.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a piece of string (d) a battery cell
25. 25.⚖️ 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) False (b) True
26. 26.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sand (d) table salt
27. 27.True or false: freezing water is a change that cannot be undone. (a) False (b) True
28. 28.🧂 Which of these dissolves in water? (a) small pebbles (b) baking soda (c) chalk powder (d) cooking oil
29. 29.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
30. 30.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
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 kept the same. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) cooking oil (d) small pebbles
33. 33.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) milk turning to curd (d) folding paper
34. 34.True or false: freezing water is a change that can be undone. (a) False (b) True
35. 35.🧂 Which of these does not dissolve in water? (a) glucose powder (b) chalk powder (c) food colour (d) baking soda
36. 36.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) a piece of string (d) salt
40. 40.⚖️ 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

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