Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 759 · 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.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sugar (d) small pebbles
2. 2.⚖️ 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) days to see crystals (b) the amount of water (c) the amount of salt (d) sunny or shady place
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) turmeric powder (d) warm water
4. 4.True or false: warm water is needed for growing salt crystals. (a) False (b) True
5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals
6. 6.⚖️ 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 salt (c) the amount of water (d) days to see crystals
7. 7.True or false: freezing water is a change that cannot be undone. (a) True (b) False
8. 8.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
9. 9.True or false: cooking oil does not dissolve in water. (a) False (b) True
10. 10.True or false: freezing water is a change that can be undone. (a) False (b) True
11. 11.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
13. 13.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) glucose powder (d) cooking oil
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
16. 16.⚖️ 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
17. 17.⚖️ 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) False (b) True
18. 18.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
19. 19.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
20. 20.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
21. 21.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a balloon (d) a magnet
22. 22.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
23. 23.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) table salt (d) baking soda
24. 24.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
25. 25.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
26. 26.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) cooking oil (d) sugar
27. 27.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
28. 28.True or false: table salt does not dissolve in water. (a) False (b) True
29. 29.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) sawdust (d) sand
31. 31.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting butter (c) baking a cake (d) milk turning to curd
32. 32.True or false: baking soda does not dissolve in water. (a) False (b) True
33. 33.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) melting ice (d) milk turning to curd
34. 34.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a magnet (d) a balloon
36. 36.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) sugar (d) cooking oil
37. 37.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) melting butter (d) baking a cake
38. 38.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a battery cell (d) a piece of string

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