Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 331 · 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.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
2. 2.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
3. 3.⚖️ 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) True (b) False
4. 4.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
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 keep it the same (c) we change it
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
7. 7.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
8. 8.🧺 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 balloon (d) warm water
9. 9.⚖️ 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
10. 10.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) chalk powder (d) table salt
11. 11.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
12. 12.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
13. 13.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) small pebbles (d) table salt
14. 14.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) small pebbles (d) baking soda
15. 15.⚖️ 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) True (b) False
16. 16.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a piece of string (d) a magnet
18. 18.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) baking a cake (d) freezing water
19. 19.True or false: sand dissolves in water. (a) True (b) False
20. 20.🔮 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
21. 21.⚖️ 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) True (b) False
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) salt (c) a spoon (d) a shallow dish
23. 23.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a mirror (d) a shallow dish
24. 24.🔍 Which is the odd one out? (a) table salt (b) sand (c) sugar (d) glucose powder
25. 25.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
26. 26.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
27. 27.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
28. 28.🔍 Which is the odd one out? (a) food colour (b) table salt (c) chalk powder (d) sugar
29. 29.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
30. 30.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
31. 31.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) glucose powder (d) sand
32. 32.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) food colour (d) sugar
33. 33.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.True or false: cooking an egg is a change that can be undone. (a) False (b) True
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) sunny or shady place (b) the same dish (c) the kind of salt (d) days to see crystals
36. 36.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
37. 37.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
38. 38.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
39. 39.⚖️ 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
40. 40.⚖️ 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 keep it the same (b) we measure it (c) we change it

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