Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 820 · 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.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
2. 2.🧈 Which of these is a change that can be undone? (a) folding paper (b) browning lemon ink (c) rusting iron (d) milk turning to curd
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) a balloon
4. 4.⚖️ 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
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) browning lemon ink (d) melting butter
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
7. 7.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
8. 8.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
9. 9.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) it turns to butter (d) salt crystals form
10. 10.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) sand (d) sawdust
12. 12.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) sugar (d) sand
13. 13.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
14. 14.🧂 Which of these dissolves in water? (a) baking soda (b) cooking oil (c) sawdust (d) chalk powder
15. 15.🔍 Which is the odd one out? (a) sugar (b) sand (c) baking soda (d) food colour
16. 16.⚖️ 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 kind of salt (b) sunny or shady place (c) days to see crystals (d) the same dish
17. 17.True or false: food colour does not dissolve in water. (a) True (b) False
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) salt (d) a battery cell
20. 20.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
21. 21.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
22. 22.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) sugar (d) table salt
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) yeast (d) salt
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
26. 26.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) sand (d) food colour
27. 27.⚖️ 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) sunny or shady place (b) the kind of salt (c) the amount of salt (d) the same dish
28. 28.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
29. 29.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) table salt (d) sand
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a magnet (d) a shallow dish
31. 31.True or false: salt is needed for growing salt crystals. (a) True (b) False
32. 32.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a magnet (d) a piece of string
34. 34.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
35. 35.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
36. 36.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) baking soda (d) sawdust
37. 37.⚖️ 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 change it (b) we keep it the same (c) we measure it
38. 38.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a magnet (d) a shallow dish
40. 40.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) food colour (d) small pebbles

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