Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 850 · 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.⚖️ 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
2. 2.True or false: warm water is needed for growing salt crystals. (a) True (b) False
3. 3.True or false: melting butter is a change that can be undone. (a) True (b) False
4. 4.⚖️ 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) True (b) False
5. 5.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sugar (d) small pebbles
6. 6.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a magnet (d) a shallow dish
8. 8.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
10. 10.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
13. 13.⚖️ 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) True (b) False
14. 14.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
15. 15.🧂 Which of these dissolves in water? (a) glucose powder (b) chalk powder (c) small pebbles (d) sand
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) salt (d) a balloon
17. 17.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) baking soda (d) sugar
18. 18.True or false: freezing water is a change that can be undone. (a) False (b) True
19. 19.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a magnet (d) a spoon
22. 22.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a balloon (d) a piece of string
23. 23.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
24. 24.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) melting ice (d) cooking an egg
25. 25.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
26. 26.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) small pebbles (d) food colour
27. 27.⚖️ 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 change it (b) we keep it the same (c) we measure it
28. 28.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
31. 31.True or false: food colour does not dissolve in water. (a) True (b) False
32. 32.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) turmeric powder (d) a shallow dish
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a spoon (d) a battery cell
35. 35.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.True or false: cooking oil does not dissolve in water. (a) True (b) False
37. 37.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) milk turning to curd (d) dissolving salt
38. 38.True or false: melting butter is a change that cannot be undone. (a) False (b) True
39. 39.True or false: chalk powder does not dissolve in water. (a) False (b) True
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True

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