Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 907 · 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? Which of these is the one thing we change? (a) the kind of salt (b) the amount of salt (c) sunny or shady place (d) the amount of water
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) a battery cell
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 kept the same. (a) True (b) False
4. 4.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
5. 5.True or false: glucose powder dissolves in water. (a) False (b) True
6. 6.🧈 Which of these is a change that can be undone? (a) melting ice (b) baking a cake (c) browning lemon ink (d) cooking an egg
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.⚖️ 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
9. 9.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
11. 11.🔮 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
12. 12.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
13. 13.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) fish make it (d) sea water evaporates
14. 14.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
15. 15.True or false: sugar does not dissolve in water. (a) False (b) True
16. 16.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) salt grows roots (d) the dish melts
18. 18.True or false: cooking an egg is a change that can be undone. (a) False (b) True
19. 19.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) food colour (d) small pebbles
20. 20.⚖️ 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
21. 21.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) browning lemon ink (d) folding paper
22. 22.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
23. 23.True or false: dissolving salt is a change that can be undone. (a) False (b) True
24. 24.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) sand (d) sugar
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) salt (d) turmeric powder
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a magnet (d) warm water
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) days to see crystals (c) the kind of salt (d) sunny or shady place
28. 28.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
29. 29.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a magnet (d) warm water
31. 31.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) sugar (d) chalk powder
32. 32.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.⚖️ 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) True (b) False
34. 34.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
35. 35.⚖️ 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 keep it the same (b) we measure it (c) we change it
36. 36.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.True or false: freezing water is a change that cannot be undone. (a) True (b) False
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) a battery cell (d) a balloon
40. 40.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water

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