Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 426 · 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.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a spoon (c) a piece of string (d) a shallow dish
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
4. 4.True or false: folding paper is a change that cannot be undone. (a) False (b) True
5. 5.True or false: warm water is needed for growing salt crystals. (a) False (b) True
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of salt (c) the amount of water (d) sunny or shady place
7. 7.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
9. 9.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
10. 10.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
11. 11.🧺 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
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
13. 13.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
14. 14.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) salt (d) a shallow dish
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
18. 18.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) table salt (d) chalk powder
19. 19.True or false: melting ice is a change that can be undone. (a) False (b) True
20. 20.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
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 change it (c) we keep it the same
22. 22.True or false: salt is not needed for growing salt crystals. (a) True (b) False
23. 23.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
24. 24.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) food colour (d) sugar
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) salt (d) warm water
26. 26.True or false: dissolving salt is a change that can be undone. (a) False (b) True
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) a spoon (d) salt
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 kept the same. (a) False (b) True
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
30. 30.True or false: small pebbles does not dissolve in water. (a) True (b) False
31. 31.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.True or false: food colour does not dissolve in water. (a) False (b) True
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
34. 34.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
35. 35.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
36. 36.⚖️ 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 same dish (b) sunny or shady place (c) days to see crystals
37. 37.🧂 Which of these does not dissolve in water? (a) glucose powder (b) small pebbles (c) sugar (d) food colour
38. 38.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
39. 39.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
40. 40.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve

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