Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 309 · 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) False (b) True
2. 2.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
3. 3.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) glucose powder (d) small pebbles
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) a shallow dish (d) a spoon
5. 5.🧈 Which of these is a change that can be undone? (a) freezing water (b) baking a cake (c) rusting iron (d) cooking an egg
6. 6.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
7. 7.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
8. 8.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) food colour (d) sawdust
9. 9.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) magnetic (d) empty
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a magnet (c) warm water (d) a piece of string
11. 11.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
12. 12.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a mirror (c) turmeric powder (d) a battery cell
13. 13.⚖️ 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
14. 14.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) chalk powder (d) cooking oil
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
16. 16.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) cooking oil (d) sugar
18. 18.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
19. 19.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a balloon (d) a spoon
20. 20.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
21. 21.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) sawdust (d) food colour
22. 22.🧈 Which of these is a change that can be undone? (a) folding paper (b) baking a cake (c) rusting iron (d) milk turning to curd
23. 23.True or false: freezing water is a change that cannot be undone. (a) True (b) False
24. 24.⚖️ 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 change it (c) we keep it the same
25. 25.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) baking soda (d) chalk powder
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) yeast (c) warm water (d) a shallow dish
27. 27.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) table salt (d) food colour
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a shallow dish (d) a mirror
29. 29.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) food colour (d) small pebbles
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
31. 31.⚖️ 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
32. 32.True or false: sugar does not dissolve in water. (a) True (b) False
33. 33.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) a piece of string (d) a spoon
35. 35.⚖️ 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 same dish (c) days to see crystals (d) the amount of salt
36. 36.True or false: sawdust does not dissolve in water. (a) True (b) False
37. 37.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sand (d) glucose powder
38. 38.⚖️ 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 same dish (b) sunny or shady place (c) days to see crystals (d) the amount of salt
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same

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