Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 862 · 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 of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) milk turning to curd (d) melting ice
2. 2.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
3. 3.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
4. 4.True or false: food colour dissolves in water. (a) True (b) False
5. 5.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a magnet (d) warm water
7. 7.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) melting ice (d) browning lemon ink
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) salt (c) a piece of string (d) warm water
9. 9.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) sand (d) food colour
10. 10.⚖️ 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) the amount of water (c) the amount of salt (d) sunny or shady place
11. 11.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) folding paper (c) rusting iron (d) milk turning to curd
12. 12.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
13. 13.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) small pebbles (d) baking soda
14. 14.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
16. 16.True or false: folding paper is a change that cannot be undone. (a) True (b) False
17. 17.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) milk turning to curd (d) freezing water
18. 18.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
19. 19.True or false: melting butter is a change that cannot be undone. (a) True (b) False
20. 20.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
21. 21.⚖️ 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 change it (b) we keep it the same (c) we measure it
22. 22.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
23. 23.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
24. 24.🧂 Which of these does not dissolve in water? (a) food colour (b) chalk powder (c) table salt (d) baking soda
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) turmeric powder
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) yeast (c) a balloon (d) a magnet
28. 28.⚖️ 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 change it (c) we keep it the same
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of salt (c) the amount of water (d) sunny or shady place
30. 30.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
31. 31.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
33. 33.⚖️ 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) True (b) False
34. 34.⚖️ 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) the amount of water (c) sunny or shady place
35. 35.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) food colour (d) cooking oil
36. 36.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) food colour (d) sand
37. 37.True or false: baking soda dissolves in water. (a) False (b) True
38. 38.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) yeast (d) a magnet
40. 40.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) cooking oil (d) sand

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