Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 116 · 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.True or false: sand does not dissolve in water. (a) True (b) False
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
3. 3.⚖️ 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 change it (b) we measure it (c) we keep it the same
4. 4.🛟 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
5. 5.True or false: table salt dissolves in water. (a) False (b) True
6. 6.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) browning lemon ink (d) cooking an egg
7. 7.True or false: food colour does not dissolve in water. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) cooking oil (d) baking soda
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) yeast (d) a piece of string
10. 10.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to change its colour (d) to make it very salty
12. 12.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) table salt (d) sand
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
14. 14.⚖️ 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
15. 15.⚖️ 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 keep it the same (c) we change it
16. 16.🔮 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
17. 17.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
18. 18.🧂 Which of these dissolves in water? (a) sawdust (b) baking soda (c) small pebbles (d) sand
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) warm water (d) a battery cell
20. 20.⚖️ 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 kind of salt (c) the amount of salt (d) days to see crystals
21. 21.🔮 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
22. 22.True or false: cooking an egg is a change that can be undone. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) table salt (b) sand (c) food colour (d) sugar
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a piece of string (d) a spoon
25. 25.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
26. 26.⚖️ 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) True (b) False
27. 27.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) cooking an egg (d) melting butter
28. 28.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
29. 29.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a mirror (d) a spoon
32. 32.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
33. 33.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) magnetic (d) frozen
34. 34.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) sand (d) cooking oil
35. 35.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
36. 36.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
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 measure it (c) we keep it the same
38. 38.True or false: sugar does not dissolve in water. (a) False (b) True
39. 39.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
40. 40.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) melting ice (d) browning lemon ink

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