Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 351 · 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 spoon for growing salt crystals? (a) needed (b) not needed
2. 2.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) sugar (b) food colour (c) small pebbles (d) glucose powder
4. 4.⚖️ 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
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? What do we do with “sunny or shady place”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.True or false: melting ice is a change that can be undone. (a) True (b) False
8. 8.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
9. 9.⚖️ 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
10. 10.True or false: salt is needed for growing salt crystals. (a) False (b) True
11. 11.True or false: baking soda does not dissolve in water. (a) True (b) False
12. 12.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) yeast
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a piece of string (c) a spoon (d) a shallow dish
15. 15.True or false: freezing water is a change that cannot be undone. (a) False (b) True
16. 16.⚖️ 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) the amount of water (c) days to see crystals
17. 17.⚖️ 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) sunny or shady place (c) the amount of salt (d) the amount of water
18. 18.⚖️ 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) True (b) False
19. 19.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) dissolving salt (c) folding paper (d) melting ice
20. 20.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) table salt (d) food colour
21. 21.🧈 Which of these is a change that can be undone? (a) melting butter (b) browning lemon ink (c) rusting iron (d) cooking an egg
22. 22.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
23. 23.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the same dish (d) the amount of salt
25. 25.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sugar (d) sawdust
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a piece of string (d) a mirror
27. 27.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a piece of string (c) a shallow dish (d) salt
31. 31.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a mirror (c) yeast (d) turmeric powder
32. 32.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
33. 33.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
34. 34.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
35. 35.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) folding paper (c) freezing water (d) dissolving salt
37. 37.⚖️ 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 salt (b) days to see crystals (c) sunny or shady place
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
39. 39.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
40. 40.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form

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