Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 224 · 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: melting butter is a change that can be undone. (a) False (b) True
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
3. 3.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
4. 4.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) fish make it (d) sea water evaporates
5. 5.🧂 Which of these dissolves in water? (a) chalk powder (b) glucose powder (c) sawdust (d) sand
6. 6.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting butter (c) freezing water (d) dissolving salt
7. 7.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
8. 8.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
10. 10.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.True or false: sawdust does not dissolve in water. (a) False (b) True
12. 12.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) freezing water (d) cooking an egg
13. 13.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) sand (d) table salt
14. 14.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (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 amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) table salt (d) sand
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) sugar (d) small pebbles
21. 21.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
22. 22.⚖️ 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 same dish (c) the kind of salt (d) the amount of salt
23. 23.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a magnet (c) turmeric powder (d) a mirror
24. 24.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
25. 25.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
26. 26.True or false: table salt dissolves in water. (a) True (b) False
27. 27.⚖️ 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 amount of water (b) the kind of salt (c) the amount of salt (d) sunny or shady place
28. 28.True or false: baking a cake is a change that can be undone. (a) True (b) False
29. 29.True or false: glucose powder dissolves in water. (a) True (b) False
30. 30.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
31. 31.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
32. 32.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
33. 33.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
34. 34.⚖️ 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
35. 35.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
36. 36.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
37. 37.True or false: table salt does not dissolve in water. (a) True (b) False
38. 38.⚖️ 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) sunny or shady place (c) days to see crystals
39. 39.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
40. 40.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve

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