Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 628 · 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.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) freezing water (d) folding paper
2. 2.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
3. 3.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) chalk powder (d) sugar
4. 4.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
5. 5.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
6. 6.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can 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 kind of salt”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.⚖️ 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) False (b) True
9. 9.True or false: sawdust dissolves in water. (a) False (b) True
10. 10.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
12. 12.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
13. 13.🔍 Which is the odd one out? (a) table salt (b) food colour (c) small pebbles (d) sugar
14. 14.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) small pebbles (d) glucose powder
15. 15.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.⚖️ 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) days to see crystals (b) the kind of salt (c) sunny or shady place (d) the same dish
17. 17.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the kind of salt (c) the amount of water (d) days to see crystals
19. 19.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a shallow dish (d) a magnet
21. 21.True or false: a shallow dish 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? Which of these is kept the same? (a) the amount of water (b) days to see crystals (c) sunny or shady place
23. 23.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) yeast (d) a piece of string
25. 25.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
26. 26.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
27. 27.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) salt (d) a piece of string
30. 30.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a piece of string (d) yeast
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a balloon
34. 34.True or false: melting butter is a change that cannot be undone. (a) True (b) False
35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
36. 36.True or false: salt is not needed for growing salt crystals. (a) False (b) True
37. 37.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
38. 38.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) browning lemon ink (d) freezing water
39. 39.🔍 Which is the odd one out? (a) sugar (b) sand (c) glucose powder (d) baking soda
40. 40.True or false: small pebbles does not dissolve in water. (a) False (b) True

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