Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 292 · 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.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
3. 3.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) food colour (d) glucose powder
4. 4.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) folding paper (d) browning lemon ink
5. 5.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
6. 6.True or false: melting ice is a change that can be undone. (a) True (b) False
7. 7.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) milk turning to curd (d) melting ice
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
9. 9.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a spoon (d) warm water
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) a magnet
12. 12.⚖️ 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
13. 13.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) salt (c) a mirror (d) a battery cell
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) turmeric powder (c) warm water (d) a spoon
15. 15.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) food colour (d) cooking oil
16. 16.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) warm water (d) turmeric powder
17. 17.🧂 Which of these dissolves in water? (a) sand (b) table salt (c) small pebbles (d) sawdust
18. 18.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) salt rains down (d) fish make it
19. 19.True or false: chalk powder does not dissolve in water. (a) True (b) False
20. 20.True or false: glucose powder does not dissolve in water. (a) False (b) True
21. 21.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals
22. 22.True or false: melting butter is a change that cannot be undone. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) table salt (d) sand
24. 24.🛟 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
25. 25.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
26. 26.⚖️ 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
27. 27.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) table salt (d) small pebbles
28. 28.⚖️ 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
29. 29.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
30. 30.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
31. 31.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) yeast (d) a shallow dish
33. 33.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) food colour (d) sawdust
34. 34.True or false: freezing water is a change that cannot be undone. (a) True (b) False
35. 35.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) folding paper (d) melting butter
36. 36.⚖️ 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) days to see crystals (c) the same dish (d) the amount of salt
37. 37.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.⚖️ 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 measure it (c) we keep it the same
39. 39.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
40. 40.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up

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