Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 932 · 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: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
3. 3.⚖️ 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
4. 4.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) table salt (d) sand
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
6. 6.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
7. 7.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
8. 8.⚖️ 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 water (b) sunny or shady place (c) days to see crystals
9. 9.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a battery cell (d) salt
11. 11.🛟 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
12. 12.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) melting ice (d) cooking an egg
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) warm water (d) a balloon
14. 14.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) food colour (d) baking soda
15. 15.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
16. 16.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) cooking an egg (d) dissolving salt
17. 17.True or false: freezing water is a change that cannot be undone. (a) True (b) False
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 kept the same. (a) False (b) True
19. 19.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
20. 20.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) baking soda (d) small pebbles
21. 21.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
22. 22.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) baking soda (d) food colour
23. 23.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
24. 24.⚖️ 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) sunny or shady place (d) the kind of salt
25. 25.⚖️ 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 change it (c) we measure it
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) yeast (d) warm water
27. 27.⚖️ 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
28. 28.⚖️ 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
29. 29.⚖️ 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 change it (b) we keep it the same (c) we measure it
30. 30.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
31. 31.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
32. 32.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.🧂 Which of these dissolves in water? (a) cooking oil (b) baking soda (c) small pebbles (d) sawdust
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 the one thing we change. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a magnet (d) a spoon
36. 36.⚖️ 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) True (b) False
37. 37.⚖️ 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 amount of salt (d) the kind of salt
38. 38.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
39. 39.True or false: salt is not needed for growing salt crystals. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) cooking oil (d) sawdust

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