Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 690 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
3. 3.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) rusting iron (d) dissolving salt
4. 4.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) salt rains down (d) fish make it
5. 5.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.True or false: yeast is needed for growing salt crystals. (a) True (b) False
7. 7.⚖️ 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 keep it the same (c) we change it
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) sugar (d) table salt
10. 10.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) food colour (d) sawdust
11. 11.True or false: food colour dissolves in water. (a) False (b) True
12. 12.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
13. 13.⚖️ 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 change it (c) we measure it
14. 14.True or false: chalk powder does not dissolve in water. (a) True (b) False
15. 15.⚖️ 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
16. 16.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) food colour (d) sand
17. 17.🧂 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
18. 18.⚖️ 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 keep it the same (c) we change it
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) turmeric powder (d) salt
23. 23.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
24. 24.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a balloon (d) warm water
26. 26.⚖️ 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) the same dish (c) the amount of salt (d) sunny or shady place
27. 27.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) chalk powder (d) table salt
28. 28.⚖️ 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 salt (c) the amount of water (d) sunny or shady place
29. 29.🧂 Which of these does not dissolve in water? (a) cooking oil (b) baking soda (c) food colour (d) glucose powder
30. 30.True or false: baking a cake is a change that can be undone. (a) False (b) True
31. 31.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
32. 32.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
33. 33.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.⚖️ 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
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a shallow dish (d) turmeric powder
36. 36.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
37. 37.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
38. 38.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
39. 39.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) baking soda (d) chalk powder
40. 40.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water

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