Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 55 · 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) a shallow dish (b) warm water (c) a piece of string (d) turmeric powder
2. 2.⚖️ 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) True (b) False
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a magnet (d) a shallow dish
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a shallow dish (d) a mirror
5. 5.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a magnet (c) a shallow dish (d) warm water
7. 7.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a spoon (d) a balloon
10. 10.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
11. 11.⚖️ 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 change it (b) we keep it the same (c) we measure it
12. 12.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
13. 13.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) a shallow dish (d) a spoon
15. 15.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a battery cell (c) a magnet (d) a balloon
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.True or false: table salt does not dissolve in water. (a) True (b) False
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
19. 19.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
21. 21.🔮 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
22. 22.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
24. 24.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
25. 25.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧈 Can this change be undone: milk turning to curd? (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? True or false: sunny or shady place is the one thing we change. (a) True (b) False
28. 28.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
29. 29.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) cooking an egg (d) folding paper
30. 30.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) melting butter (d) dissolving salt
31. 31.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) small pebbles (d) sand
32. 32.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
33. 33.⚖️ 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 amount of salt (b) days to see crystals (c) sunny or shady place (d) the kind of salt
34. 34.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
35. 35.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a spoon (d) a magnet
36. 36.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
37. 37.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
38. 38.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
39. 39.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
40. 40.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True

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