Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 750 · 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 is the odd one out? (a) table salt (b) small pebbles (c) baking soda (d) sugar
2. 2.⚖️ 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
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
5. 5.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a magnet (d) salt
7. 7.🔍 Which is the odd one out? (a) sand (b) food colour (c) glucose powder (d) sugar
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the amount of salt (c) sunny or shady place
9. 9.True or false: sawdust dissolves in water. (a) True (b) False
10. 10.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
11. 11.🧂 Which of these dissolves in water? (a) table salt (b) sawdust (c) small pebbles (d) cooking oil
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
13. 13.⚖️ 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 keep it the same (c) we measure it
14. 14.True or false: dissolving salt is a change that can be undone. (a) False (b) True
15. 15.True or false: melting ice is a change that cannot be undone. (a) True (b) False
16. 16.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
17. 17.True or false: small pebbles does not dissolve in water. (a) False (b) True
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
19. 19.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) melting ice (d) milk turning to curd
20. 20.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
21. 21.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) sugar (d) sand
22. 22.⚖️ 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 same dish (b) the amount of water (c) the amount of salt (d) sunny or shady place
23. 23.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
26. 26.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
27. 27.⚖️ 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 keep it the same (b) we measure it (c) we change it
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a shallow dish (d) a mirror
29. 29.⚖️ 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) False (b) True
30. 30.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a spoon (d) a mirror
32. 32.True or false: chalk powder dissolves in water. (a) False (b) True
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
34. 34.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
35. 35.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
38. 38.🧂 Which of these dissolves in water? (a) sawdust (b) food colour (c) sand (d) small pebbles
39. 39.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
40. 40.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to change its colour (d) to make it fizz

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