Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 542 · 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 needed for growing salt crystals? (a) a magnet (b) a balloon (c) a shallow dish (d) yeast
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 kept the same. (a) False (b) True
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
4. 4.🔍 Which is the odd one out? (a) table salt (b) sugar (c) chalk powder (d) food colour
5. 5.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) baking soda (d) sand
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) sugar (d) sawdust
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
9. 9.True or false: melting butter is a change that cannot be undone. (a) True (b) False
10. 10.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) a shallow dish (d) salt
13. 13.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
14. 14.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
15. 15.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) small pebbles (d) glucose powder
16. 16.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
17. 17.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) folding paper (d) rusting iron
18. 18.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
19. 19.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
20. 20.⚖️ 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) False (b) True
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) sawdust (d) glucose powder
23. 23.⚖️ 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
24. 24.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny stars (d) tiny cubes
25. 25.True or false: salt is not needed for growing salt crystals. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) sawdust (d) sand
27. 27.True or false: glucose powder dissolves in water. (a) False (b) True
28. 28.🔮 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
29. 29.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
31. 31.⚖️ 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) True (b) False
32. 32.⚖️ 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
33. 33.True or false: melting butter is a change that can be undone. (a) False (b) True
34. 34.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
36. 36.⚖️ 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 salt (c) sunny or shady place
37. 37.True or false: sugar does not dissolve in water. (a) True (b) False
38. 38.⚖️ 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 amount of salt (b) sunny or shady place (c) the amount of water (d) the same dish
39. 39.True or false: baking a cake is a change that can be undone. (a) True (b) False
40. 40.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone

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