Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 965 · 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.True or false: freezing water is a change that can be undone. (a) False (b) True
2. 2.🛟 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
3. 3.True or false: small pebbles does not dissolve in water. (a) False (b) True
4. 4.True or false: sugar does not dissolve in water. (a) True (b) False
5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
6. 6.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) saturated (d) empty
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a magnet (c) a shallow dish (d) warm water
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
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) sunny or shady place (b) the amount of water (c) days to see crystals (d) the amount of salt
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
11. 11.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sugar (d) sand
12. 12.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) baking a cake (c) dissolving salt (d) freezing water
13. 13.True or false: yeast is needed for growing salt crystals. (a) False (b) True
14. 14.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
15. 15.⚖️ 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
16. 16.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
17. 17.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
18. 18.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a magnet (d) warm water
19. 19.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) sugar (d) food colour
20. 20.🔮 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
21. 21.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) baking soda (d) sawdust
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) turmeric powder (d) a shallow dish
23. 23.True or false: melting ice is a change that can be undone. (a) True (b) False
24. 24.True or false: small pebbles dissolves in water. (a) True (b) False
25. 25.True or false: folding paper 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) it fizzes (c) few or no crystals (d) crystals grow faster
27. 27.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
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 the one thing we change. (a) True (b) False
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a shallow dish (c) salt (d) a spoon
30. 30.⚖️ 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 same dish
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) a shallow dish (d) warm water
33. 33.⚖️ 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
34. 34.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) cooking an egg (c) baking a cake (d) milk turning to curd
35. 35.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
36. 36.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) small pebbles (d) sugar
37. 37.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
38. 38.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) sawdust (d) baking soda
39. 39.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
40. 40.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts

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