Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 821 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) salt (d) a shallow dish
2. 2.True or false: folding paper is a change that can be undone. (a) False (b) True
3. 3.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a piece of string (d) a balloon
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a shallow dish (d) turmeric powder
6. 6.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
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 measure it (b) we keep it the same (c) we change it
8. 8.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) sand (d) food colour
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
13. 13.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
14. 14.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
15. 15.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
16. 16.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) food colour (d) cooking oil
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
18. 18.🛟 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
19. 19.True or false: chalk powder does not dissolve in water. (a) True (b) False
20. 20.🧂 Which of these does not dissolve in water? (a) food colour (b) sawdust (c) glucose powder (d) baking soda
21. 21.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
22. 22.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
23. 23.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) sand (d) glucose powder
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the kind of salt (c) days to see crystals
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
27. 27.⚖️ 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 salt (b) days to see crystals (c) sunny or shady place
28. 28.⚖️ 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
29. 29.True or false: chalk powder dissolves in water. (a) False (b) True
30. 30.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a spoon (d) a magnet
32. 32.🔍 Which is the odd one out? (a) table salt (b) sugar (c) glucose powder (d) chalk powder
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) a spoon (d) salt
35. 35.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
36. 36.⚖️ 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
37. 37.True or false: folding paper is a change that cannot be undone. (a) True (b) False
38. 38.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) baking a cake (d) folding paper
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) salt (d) a balloon
40. 40.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it

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