Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 817 · 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.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) warm water (d) a magnet
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
3. 3.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a piece of string (d) a shallow dish
5. 5.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
6. 6.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
7. 7.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) cooking an egg (d) melting butter
8. 8.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) small pebbles (d) baking soda
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.True or false: baking soda does not dissolve in water. (a) False (b) True
11. 11.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
13. 13.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) sawdust (d) sugar
14. 14.🧂 Which of these dissolves in water? (a) chalk powder (b) table salt (c) small pebbles (d) cooking oil
15. 15.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a spoon (c) a mirror (d) a magnet
16. 16.⚖️ 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 keep it the same (b) we change it (c) we measure it
17. 17.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
18. 18.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
19. 19.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
20. 20.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
22. 22.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
23. 23.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) sugar (d) sand
24. 24.True or false: warm water is needed for growing salt crystals. (a) False (b) True
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a piece of string (d) a battery cell
26. 26.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
27. 27.True or false: chalk powder does not dissolve in water. (a) False (b) True
28. 28.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
29. 29.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
30. 30.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) cooking oil (d) sugar
31. 31.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) cooking an egg (d) dissolving salt
32. 32.🧂 Which of these does not dissolve in water? (a) baking soda (b) sand (c) table salt (d) food colour
33. 33.True or false: sand does not dissolve in water. (a) True (b) False
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
36. 36.True or false: freezing water is a change that cannot be undone. (a) False (b) True
37. 37.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
38. 38.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
39. 39.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
40. 40.⚖️ 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 amount of water (c) the same dish (d) sunny or shady place

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