Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 33 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s science idea. 3. For a fair test: one thing changed, the rest kept the same, one thing measured. 4. For safety: an adult helps, nothing goes in the mouth, no heat, sharp tools or plug points for children.

1. 1.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they mix for ever (c) they become solid (d) they separate again
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a battery cell (d) an empty thread reel
3. 3.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) honey (c) a balloon (d) a spoon
4. 4.🛟 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
5. 5.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) salt
6. 6.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🌱 Will these sprout: seeds on dry cotton? (a) does not sprout (b) sprouts
8. 8.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a brighter view (b) a rainbow (c) two pictures (d) only darkness
9. 9.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) two chairs (c) turmeric powder (d) sticky tape
10. 10.🧺 Which of these is not needed for the magnet test? (a) a tray (b) a results chart (c) a bar magnet (d) turmeric powder
11. 11.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) time (d) sunlight
12. 12.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
13. 13.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) whether it floats (b) the amount of clay (c) the tub of water (d) the shape of the clay
14. 14.🔍 Which is the odd one out? (a) a piece of thermocol (b) a pebble (c) a cork (d) a feather
15. 15.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) it stays still (b) straight down (c) backward (d) forward
16. 16.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) a mirror (c) a balloon (d) a few hours of waiting
17. 17.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🛟 Which of these is an unsafe habit? (a) asking an adult first (b) reading the steps first (c) washing hands afterwards (d) touching a hot iron
19. 19.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is magnetic (d) it is heavier
20. 20.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) plain water (d) detergent water
21. 21.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a vacuum cleaner
22. 22.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) it looks nicer (d) water is heavier
23. 23.🔮 Predict: you drop a bar magnet on the floor many times. What happens? (a) it turns to copper (b) it becomes heavier (c) it gets weaker (d) it gets stronger
24. 24.🧺 Which of these is needed for the paper bridge? (a) yeast (b) a ruler (c) a battery cell (d) a mirror
25. 25.🛟 Which of these is an unsafe habit? (a) washing hands afterwards (b) asking an adult first (c) running with glassware (d) tying back long hair
26. 26.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
27. 27.True or false: turmeric powder is not needed for making butter. (a) False (b) True
28. 28.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
30. 30.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the person dropping (b) the paper clip (c) the drop height (d) the length of the blades
31. 31.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) pour it on the floor (c) throw the glass (d) do not lick the spoon
32. 32.True or false: a glass marble is denser than water. (a) False (b) True
33. 33.🧺 Which of these is not needed for making butter? (a) a magnet (b) cold water to rinse (c) a jar with a tight lid (d) a bowl
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
36. 36.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it might sing (d) it is magnetic
37. 37.🧺 Which of these is needed for the water cycle bowl? (a) turmeric powder (b) a big bowl (c) a battery cell (d) a magnet
38. 38.🌉 Does a flat tissue make a strong or a weak bridge? (a) strong bridge (b) weak bridge
39. 39.🔭 Why must the two mirrors face each other and be parallel? (a) so it looks shiny (b) so light reaches the eye (c) to make it heavy (d) so it can float
40. 40.True or false: a balloon is needed for the coloured flower experiment. (a) True (b) False

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