Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 875 · 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.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) yeast (c) warm water (d) a shallow dish
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) warm water (c) a spoon (d) salt
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🔮 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
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny spheres (d) tiny triangles
9. 9.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) glucose powder (d) small pebbles
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a shallow dish (d) a balloon
12. 12.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
13. 13.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
15. 15.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) browning lemon ink (d) melting ice
16. 16.⚖️ 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) True (b) False
17. 17.🧈 Which of these is a change that can be undone? (a) melting ice (b) rusting iron (c) cooking an egg (d) milk turning to curd
18. 18.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) salt (d) a mirror
19. 19.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) baking soda (d) cooking oil
20. 20.True or false: melting ice is a change that cannot be undone. (a) False (b) True
21. 21.True or false: cooking oil dissolves in water. (a) False (b) True
22. 22.True or false: folding paper is a change that can be undone. (a) True (b) False
23. 23.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a magnet (d) a spoon
26. 26.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.⚖️ 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) sunny or shady place (b) the amount of salt (c) the amount of water (d) the same dish
28. 28.⚖️ 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
29. 29.🧂 Which of these does not dissolve in water? (a) chalk powder (b) table salt (c) sugar (d) baking soda
30. 30.⚖️ 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) True (b) False
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) a shallow dish (d) yeast
32. 32.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
33. 33.True or false: table salt does not dissolve in water. (a) False (b) True
34. 34.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) it turns to butter (d) salt crystals form
35. 35.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
36. 36.⚖️ 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
37. 37.⚖️ 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 kind of salt
38. 38.True or false: melting butter is a change that cannot be undone. (a) True (b) False
39. 39.True or false: table salt dissolves in water. (a) False (b) True
40. 40.True or false: rusting iron is a change that cannot be undone. (a) False (b) True

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