Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 607 · 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.⚖️ 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) True (b) False
2. 2.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
3. 3.True or false: baking soda does not dissolve in water. (a) True (b) False
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) a shallow dish (d) salt
5. 5.⚖️ 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) the kind of salt (c) the amount of salt (d) the amount of water
6. 6.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
7. 7.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
8. 8.True or false: baking a cake is a change that can be undone. (a) False (b) True
9. 9.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
10. 10.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
11. 11.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
13. 13.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
14. 14.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) baking soda (d) small pebbles
15. 15.🔍 Which is the odd one out? (a) sugar (b) sand (c) chalk powder (d) cooking oil
16. 16.⚖️ 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 keep it the same (b) we change it (c) we measure it
17. 17.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny spheres (d) tiny cubes
18. 18.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a battery cell (d) salt
20. 20.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) warm water (d) a balloon
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 kept the same. (a) False (b) True
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
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 amount of water (b) days to see crystals (c) the amount of salt (d) sunny or shady place
25. 25.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) glucose powder (d) sugar
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a spoon (d) a battery cell
28. 28.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
30. 30.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
31. 31.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) milk turning to curd (d) folding paper
32. 32.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
33. 33.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
34. 34.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) freezing water
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) a spoon (d) a piece of string
36. 36.True or false: sawdust dissolves in water. (a) True (b) False
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a magnet (d) salt
38. 38.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
39. 39.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a mirror (d) a piece of string

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