Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 947 · 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 is the odd one out? (a) sugar (b) glucose powder (c) small pebbles (d) baking soda
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
3. 3.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
6. 6.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) cooking oil (d) food colour
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
9. 9.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) cooking an egg (d) dissolving salt
10. 10.⚖️ 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 change it (b) we keep it the same (c) we measure it
11. 11.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
12. 12.⚖️ 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
13. 13.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) milk turning to curd (c) dissolving salt (d) folding paper
14. 14.True or false: salt is not needed for growing salt crystals. (a) False (b) True
15. 15.True or false: baking soda dissolves in water. (a) False (b) True
16. 16.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sawdust (d) table salt
17. 17.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
18. 18.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
19. 19.⚖️ 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 same dish (b) the amount of water (c) sunny or shady place (d) days to see crystals
20. 20.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
21. 21.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
22. 22.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
23. 23.🛟 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
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a balloon (c) warm water (d) a shallow dish
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a magnet (d) a piece of string
26. 26.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can 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) the kind of salt (b) sunny or shady place (c) days to see crystals
28. 28.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a shallow dish (d) a piece of string
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
32. 32.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
33. 33.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) a spoon (d) a mirror
35. 35.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) food colour (d) sand
36. 36.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
37. 37.True or false: baking soda does not dissolve in water. (a) False (b) True
38. 38.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
39. 39.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) a mirror (d) a shallow dish

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