Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 479 · 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.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a spoon (d) yeast
4. 4.⚖️ 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) sunny or shady place (d) the amount of salt
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
6. 6.🔮 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
7. 7.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) salt (d) a magnet
10. 10.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) salt rains down (d) fish make it
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 what we measure. (a) False (b) True
13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
14. 14.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) sand (d) food colour
16. 16.🧂 Which of these dissolves in water? (a) small pebbles (b) sugar (c) sawdust (d) chalk powder
17. 17.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting ice (c) milk turning to curd (d) rusting iron
18. 18.True or false: cooking oil does not dissolve in water. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) food colour (d) sand
20. 20.True or false: chalk powder dissolves in water. (a) False (b) True
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a mirror (c) salt (d) warm water
22. 22.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) sugar (d) cooking oil
23. 23.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) food colour (d) glucose powder
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a spoon (d) salt
26. 26.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
27. 27.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) salt (d) turmeric powder
29. 29.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
30. 30.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) baking soda (d) table salt
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to change its colour (d) to make it fizz
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a battery cell (d) warm water
34. 34.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
35. 35.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) browning lemon ink (d) freezing water
36. 36.🔍 Which is the odd one out? (a) sugar (b) sand (c) sawdust (d) chalk powder
37. 37.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
38. 38.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a magnet (d) a spoon
40. 40.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) table salt (d) sawdust

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