Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 662 · 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.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
2. 2.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
4. 4.True or false: sawdust does not dissolve in water. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) table salt (d) sand
6. 6.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
7. 7.⚖️ 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 measure it (b) we change it (c) we keep it the same
8. 8.True or false: melting butter is a change that cannot be undone. (a) False (b) True
9. 9.⚖️ 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 kind of salt (b) the amount of water (c) sunny or shady place (d) days to see crystals
10. 10.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
11. 11.True or false: baking a cake is a change that can be undone. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) cooking oil (d) chalk powder
13. 13.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) baking a cake (d) melting butter
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) salt (d) a shallow dish
15. 15.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
16. 16.True or false: warm water is needed for growing salt crystals. (a) True (b) False
17. 17.⚖️ 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 kind of salt (c) sunny or shady place (d) days to see crystals
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
19. 19.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) turmeric powder (d) warm water
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
22. 22.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a piece of string (d) a magnet
23. 23.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) warm water (d) a magnet
24. 24.⚖️ 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
25. 25.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
27. 27.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) melting ice (d) baking a cake
29. 29.⚖️ 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) False (b) True
30. 30.⚖️ 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
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
32. 32.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.🔍 Which is the odd one out? (a) sugar (b) sand (c) cooking oil (d) small pebbles
34. 34.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) food colour (d) small pebbles
35. 35.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a balloon (d) a shallow dish
37. 37.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
38. 38.⚖️ 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
39. 39.True or false: yeast is needed for growing salt crystals. (a) False (b) True
40. 40.🧈 Which of these is a change that can be undone? (a) baking a cake (b) dissolving salt (c) cooking an egg (d) browning lemon ink

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