Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 972 · 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) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
3. 3.True or false: freezing water is a change that cannot be undone. (a) False (b) True
4. 4.🧂 Which of these dissolves in water? (a) small pebbles (b) sugar (c) cooking oil (d) chalk powder
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) warm water (d) yeast
6. 6.⚖️ 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 amount of water (b) sunny or shady place (c) days to see crystals
7. 7.True or false: dissolving salt is a change that can be undone. (a) True (b) False
8. 8.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
9. 9.🔍 Which is the odd one out? (a) sand (b) sawdust (c) baking soda (d) small pebbles
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
11. 11.True or false: salt is not needed for growing salt crystals. (a) False (b) True
12. 12.⚖️ 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) sunny or shady place (c) the amount of salt (d) the amount of water
13. 13.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) freezing water (d) baking a cake
14. 14.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a mirror (c) yeast (d) a battery cell
15. 15.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
16. 16.🧂 Which of these dissolves in water? (a) sawdust (b) food colour (c) sand (d) chalk powder
17. 17.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) it turns to butter (d) salt crystals form
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a spoon (d) a balloon
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) salt (d) a shallow dish
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 measure it (b) we change it (c) we keep it the same
23. 23.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
24. 24.🔮 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
25. 25.⚖️ 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
26. 26.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of salt
28. 28.True or false: melting butter is a change that can be undone. (a) False (b) True
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
30. 30.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) cooking an egg (d) dissolving salt
31. 31.True or false: small pebbles dissolves in water. (a) False (b) True
32. 32.🧂 Which of these dissolves in water? (a) baking soda (b) sand (c) sawdust (d) small pebbles
33. 33.🔍 Which is the odd one out? (a) small pebbles (b) food colour (c) sand (d) sawdust
34. 34.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
35. 35.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) warm water (d) a magnet
37. 37.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a mirror (d) a spoon
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) turmeric powder (d) a spoon
40. 40.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) chalk powder (d) sugar

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