Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 496 · 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 “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) small pebbles (d) table salt
3. 3.True or false: yeast is needed for growing salt crystals. (a) True (b) False
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
5. 5.True or false: folding paper is a change that can be undone. (a) True (b) False
6. 6.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
7. 7.⚖️ 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
8. 8.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) small pebbles (d) food colour
9. 9.⚖️ 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) the same dish (c) the amount of salt (d) sunny or shady place
10. 10.🧂 Which of these dissolves in water? (a) chalk powder (b) sugar (c) cooking oil (d) sand
11. 11.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
13. 13.True or false: small pebbles does not dissolve in water. (a) False (b) True
14. 14.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) a shallow dish (d) salt
16. 16.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
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 kind of salt (b) the amount of water (c) days to see crystals (d) the same dish
18. 18.⚖️ 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 change it (c) we measure it
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) a shallow dish (d) warm water
21. 21.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
22. 22.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a mirror (d) a piece of string
24. 24.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) baking soda (d) glucose powder
25. 25.🧂 Which of these dissolves in water? (a) sand (b) table salt (c) small pebbles (d) chalk powder
26. 26.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) sand (d) small pebbles
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a mirror (d) a shallow dish
28. 28.🔮 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
29. 29.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
32. 32.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
33. 33.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
35. 35.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
36. 36.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
37. 37.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: food colour dissolves in water. (a) True (b) False
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) warm water (d) a battery cell
40. 40.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) baking soda (d) sugar

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