Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 771 · 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.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
2. 2.True or false: table salt dissolves in water. (a) True (b) False
3. 3.⚖️ 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) sunny or shady place (c) the same dish
4. 4.⚖️ 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
5. 5.True or false: sawdust dissolves in water. (a) False (b) True
6. 6.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) sugar crystals form (d) it turns to butter
8. 8.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
9. 9.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
10. 10.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
11. 11.🧂 Which of these dissolves in water? (a) cooking oil (b) food colour (c) small pebbles (d) chalk powder
12. 12.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.True or false: salt is needed for growing salt crystals. (a) False (b) True
14. 14.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) rusting iron (c) freezing water (d) folding paper
15. 15.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
16. 16.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
17. 17.⚖️ 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
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
19. 19.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) glucose powder (d) cooking oil
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) warm water (d) a spoon
21. 21.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
22. 22.True or false: baking soda dissolves in water. (a) False (b) True
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
24. 24.⚖️ 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 water (b) the amount of salt (c) sunny or shady place (d) days to see crystals
25. 25.True or false: freezing water is a change that cannot be undone. (a) True (b) False
26. 26.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
27. 27.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
28. 28.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) chalk powder (d) glucose powder
29. 29.🧂 Which of these dissolves in water? (a) sand (b) table salt (c) sawdust (d) small pebbles
30. 30.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting butter (c) baking a cake (d) milk turning to curd
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a mirror (d) salt
32. 32.⚖️ 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 change it (c) we keep it the same
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) yeast (d) a piece of string
34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
35. 35.⚖️ 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
36. 36.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) melting ice (d) freezing water
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
38. 38.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) sawdust (d) table salt
39. 39.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.⚖️ 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) days to see crystals (c) the amount of salt

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