Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 196 · 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.🛟 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
2. 2.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
3. 3.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
4. 4.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
5. 5.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
6. 6.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) sand (d) chalk powder
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
8. 8.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
9. 9.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) cooking an egg (d) freezing water
10. 10.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) cooking oil (d) table salt
11. 11.⚖️ 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) True (b) False
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) a spoon (d) salt
13. 13.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) baking a cake (c) freezing water (d) melting ice
14. 14.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
15. 15.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
16. 16.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
17. 17.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) melting butter (d) cooking an egg
18. 18.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a balloon (c) a magnet (d) a mirror
19. 19.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) small pebbles (d) sugar
20. 20.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
21. 21.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
22. 22.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
23. 23.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) sand (d) baking soda
24. 24.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a magnet (d) a shallow dish
25. 25.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) sugar (d) sand
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a spoon (d) yeast
27. 27.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
28. 28.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) sugar (d) table salt
29. 29.🧂 Does baking soda 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? Which of these is what we measure? (a) the kind of salt (b) the same dish (c) the amount of salt (d) days to see crystals
31. 31.⚖️ 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
32. 32.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) table salt (d) cooking oil
33. 33.True or false: melting butter is a change that cannot be undone. (a) False (b) True
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
35. 35.True or false: melting ice is a change that cannot be undone. (a) True (b) False
36. 36.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
37. 37.True or false: food colour does not dissolve in water. (a) True (b) False
38. 38.⚖️ 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 measure it (c) we change it
39. 39.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
40. 40.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars

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