Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 315 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a magnet (d) salt
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) the kind of salt (b) days to see crystals (c) sunny or shady place (d) the same dish
3. 3.⚖️ 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
4. 4.True or false: sawdust dissolves in water. (a) True (b) False
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
6. 6.True or false: freezing water is a change that can be undone. (a) True (b) False
7. 7.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
8. 8.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) milk turning to curd (d) baking a cake
9. 9.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) fish make it (d) salt rains down
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny stars (d) tiny triangles
11. 11.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) rusting iron (d) dissolving salt
12. 12.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a battery cell (d) warm water
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a shallow dish (d) a balloon
15. 15.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) melting butter (d) dissolving salt
17. 17.True or false: salt is needed for growing salt crystals. (a) False (b) True
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a spoon (d) a mirror
19. 19.True or false: glucose powder dissolves in water. (a) True (b) False
20. 20.True or false: cooking oil does not dissolve in water. (a) False (b) True
21. 21.True or false: sugar dissolves in water. (a) True (b) False
22. 22.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🧂 Which of these does not dissolve in water? (a) small pebbles (b) glucose powder (c) sugar (d) food colour
24. 24.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
25. 25.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) browning lemon ink (d) folding paper
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a spoon (c) a magnet (d) a mirror
27. 27.⚖️ 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
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) cooking oil (d) sand
30. 30.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
31. 31.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
32. 32.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) a piece of string (d) a spoon
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) a balloon
35. 35.True or false: baking a cake is a change that cannot be undone. (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) yeast (c) warm water (d) a spoon
37. 37.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) cooking oil (d) glucose powder
38. 38.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
39. 39.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
40. 40.⚖️ 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) True (b) False

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