Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 510 · 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.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
2. 2.True or false: melting ice is a change that cannot be undone. (a) True (b) False
3. 3.⚖️ 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
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) the amount of salt (b) the kind of salt (c) days to see crystals (d) the amount of water
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
6. 6.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.True or false: salt is needed for growing salt crystals. (a) False (b) True
8. 8.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) baking soda (b) small pebbles (c) sand (d) chalk powder
10. 10.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
11. 11.⚖️ 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 amount of water (b) the same dish (c) sunny or shady place (d) days to see crystals
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a mirror (d) a shallow dish
13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) a shallow dish (d) a mirror
15. 15.⚖️ 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 keep it the same (b) we measure it (c) we change it
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the same dish (c) days to see crystals
18. 18.True or false: warm water is needed for growing salt crystals. (a) True (b) False
19. 19.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) a battery cell
21. 21.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) rusting iron (c) melting ice (d) melting butter
22. 22.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
23. 23.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) a battery cell (d) turmeric powder
24. 24.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) sugar (d) chalk powder
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a magnet (d) salt
26. 26.⚖️ 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 keep it the same (c) we change it
27. 27.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
28. 28.🔍 Which is the odd one out? (a) sand (b) sawdust (c) small pebbles (d) food colour
29. 29.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
30. 30.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) cooking an egg (d) folding paper
31. 31.⚖️ 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 measure it (b) we change it (c) we keep it the same
32. 32.⚖️ 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 measure it (b) we change it (c) we keep it the same
33. 33.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) cooking oil (d) food colour
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
36. 36.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a battery cell (d) salt
38. 38.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) a piece of string (d) a shallow dish
40. 40.True or false: warm water is not needed for growing salt crystals. (a) True (b) False

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