Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 150 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a battery cell (d) salt
2. 2.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) food colour (d) sugar
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
4. 4.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) chalk powder (d) sand
5. 5.True or false: table salt does not dissolve in water. (a) True (b) False
6. 6.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) cooking an egg (d) melting butter
7. 7.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
8. 8.⚖️ 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) days to see crystals (c) the same dish (d) the kind of salt
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) turmeric powder (d) warm water
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
12. 12.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) rusting iron (d) melting butter
14. 14.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
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 amount of water (b) sunny or shady place (c) the amount of salt (d) the kind of salt
16. 16.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
17. 17.True or false: sand does not dissolve in water. (a) True (b) False
18. 18.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
19. 19.⚖️ 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) False (b) True
20. 20.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a balloon (d) salt
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
27. 27.True or false: cooking oil dissolves in water. (a) False (b) True
28. 28.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
29. 29.🌊 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
30. 30.True or false: chalk powder does not dissolve in water. (a) False (b) True
31. 31.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
33. 33.🔮 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
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) a battery cell (d) warm water
35. 35.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.True or false: sawdust dissolves in water. (a) False (b) True
38. 38.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
39. 39.🧂 Which of these does not dissolve in water? (a) table salt (b) cooking oil (c) food colour (d) sugar
40. 40.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) sugar (d) food colour

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