Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 901 · 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 kept the same. (a) False (b) True
2. 2.⚖️ 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 amount of water (c) the same dish (d) days to see crystals
3. 3.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
5. 5.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
6. 6.True or false: melting butter is a change that cannot be undone. (a) False (b) True
7. 7.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting ice (c) milk turning to curd (d) baking a cake
8. 8.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) melting butter (d) milk turning to curd
9. 9.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) glucose powder (d) food colour
10. 10.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) cooking an egg (c) baking a cake (d) browning lemon ink
11. 11.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
12. 12.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) food colour (d) chalk powder
13. 13.True or false: warm water is needed for growing salt crystals. (a) False (b) True
14. 14.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) a piece of string (d) warm water
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a spoon (c) a magnet (d) a battery cell
18. 18.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
19. 19.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.🧂 Which of these dissolves in water? (a) small pebbles (b) baking soda (c) cooking oil (d) sand
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a shallow dish (d) a battery cell
22. 22.⚖️ 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
23. 23.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) melting ice (d) baking a cake
24. 24.⚖️ 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) False (b) True
25. 25.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) dissolving salt (d) browning lemon ink
26. 26.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
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 measure it (b) we keep it the same (c) we change it
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a spoon (d) yeast
29. 29.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.⚖️ 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
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
32. 32.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.⚖️ 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 keep it the same (c) we measure it
34. 34.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
35. 35.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
36. 36.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
38. 38.True or false: freezing water is a change that cannot be undone. (a) True (b) False
39. 39.⚖️ 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
40. 40.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone

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