Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 894 · 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.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) salt (d) a balloon
3. 3.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny triangles (d) tiny stars
4. 4.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
5. 5.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a battery cell (d) salt
8. 8.🧂 Which of these dissolves in water? (a) sugar (b) sand (c) cooking oil (d) sawdust
9. 9.⚖️ 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 keep it the same (c) we change it
10. 10.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
11. 11.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
14. 14.True or false: salt is not needed for growing salt crystals. (a) True (b) False
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) warm water (d) a magnet
16. 16.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
17. 17.⚖️ 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) sunny or shady place (c) the same dish (d) days to see crystals
18. 18.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) cooking an egg (d) freezing water
19. 19.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) turmeric powder (c) a piece of string (d) salt
21. 21.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) salt (d) a balloon
23. 23.True or false: rusting iron is a change that can be undone. (a) True (b) False
24. 24.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
25. 25.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
26. 26.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
28. 28.⚖️ 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) days to see crystals (c) sunny or shady place
29. 29.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) sugar (d) chalk powder
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.⚖️ 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 salt (b) sunny or shady place (c) the kind of salt (d) the same dish
32. 32.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
33. 33.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) freezing water (c) dissolving salt (d) melting ice
34. 34.True or false: glucose powder does not dissolve in water. (a) False (b) True
35. 35.True or false: freezing water is a change that cannot be undone. (a) False (b) True
36. 36.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) baking a cake (d) melting butter
37. 37.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) table salt (d) small pebbles
38. 38.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) cooking oil (d) food colour
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a spoon (d) a mirror
40. 40.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone

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