Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 696 · 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.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) a shallow dish (d) salt
3. 3.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
4. 4.⚖️ 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) sunny or shady place (c) the kind of salt (d) the same dish
5. 5.⚖️ 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) False (b) True
6. 6.True or false: melting ice is a change that cannot be undone. (a) True (b) False
7. 7.True or false: baking a cake is a change that can be undone. (a) True (b) False
8. 8.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
9. 9.⚖️ 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) days to see crystals (b) the amount of water (c) the kind of salt (d) sunny or shady place
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.⚖️ 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
12. 12.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) melting butter (d) milk turning to curd
13. 13.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) a mirror (d) salt
14. 14.True or false: food colour dissolves in water. (a) False (b) True
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
17. 17.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) rusting iron (d) melting ice
18. 18.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) cooking an egg (d) freezing water
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) warm water (c) salt (d) a shallow dish
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
22. 22.🧂 Which of these dissolves in water? (a) sawdust (b) food colour (c) cooking oil (d) chalk powder
23. 23.True or false: salt is not needed for growing salt crystals. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) cooking oil (d) baking soda
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) sunny or shady place (c) days to see crystals
26. 26.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
27. 27.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
28. 28.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) sawdust (d) sugar
29. 29.⚖️ 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 keep it the same (b) we measure it (c) we change it
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
31. 31.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
33. 33.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) sand (b) food colour (c) glucose powder (d) sugar
35. 35.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
36. 36.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.True or false: small pebbles dissolves in water. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a spoon (d) a balloon
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a battery cell (d) a spoon
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) warm water (d) turmeric powder

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