Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 740 · 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? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a battery cell (d) salt
3. 3.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a shallow dish (c) warm water (d) a piece of string
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
6. 6.True or false: table salt does not dissolve in water. (a) True (b) False
7. 7.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
8. 8.True or false: folding paper is a change that can be undone. (a) False (b) True
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a piece of string (c) a shallow dish (d) salt
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 change it (b) we keep it the same (c) we measure it
11. 11.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) table salt (d) sand
12. 12.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) yeast
14. 14.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
15. 15.⚖️ 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 same dish (b) days to see crystals (c) sunny or shady place
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
17. 17.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
18. 18.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) warm water (d) a mirror
20. 20.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
21. 21.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.True or false: sugar dissolves in water. (a) True (b) False
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.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals
27. 27.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
28. 28.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
29. 29.True or false: salt is not needed for growing salt crystals. (a) False (b) True
30. 30.🧂 Which of these dissolves in water? (a) food colour (b) sand (c) cooking oil (d) sawdust
31. 31.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
32. 32.⚖️ 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
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) days to see crystals (b) sunny or shady place (c) the kind of salt
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a spoon (d) a mirror
35. 35.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) sand (d) food colour
36. 36.True or false: folding paper is a change that cannot be undone. (a) False (b) True
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) warm water (d) a shallow dish
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.⚖️ 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) days to see crystals (c) sunny or shady place (d) the amount of water

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