Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 103 · 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.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) yeast (b) a bowl (c) fresh cream (d) a timer
2. 2.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
3. 3.💧 Which change is this: ice becoming water? (a) freezing (b) melting (c) condensation (d) evaporation
4. 4.True or false: a paper sheet is pulled by a magnet. (a) False (b) True
5. 5.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) a balloon (c) a magnet (d) two chairs
6. 6.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
7. 7.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) lemon juice (c) a mirror (d) a balloon
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.🚁 Why does the paper helicopter fall slowly? (a) the floor pushes it (b) air pushes on its blades (c) it has no weight (d) a magnet holds it
10. 10.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a clean glass (c) muddy water (d) turmeric powder
11. 11.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) eat a few to check (c) throw them at friends (d) never put seeds in mouth
13. 13.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) sun or shade (b) the size of the bowl (c) the time we wait (d) how many drops form
14. 14.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) the number of seeds (c) wet or dry cotton
15. 15.True or false: sand and pebbles is not needed for the muddy water filter. (a) False (b) True
16. 16.True or false: cooking oil dissolves in water. (a) True (b) False
17. 17.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.True or false: soap solution is neutral. (a) False (b) True
19. 19.True or false: wet seeds in the dark sprouts in a few days. (a) True (b) False
20. 20.True or false: yeast is needed for the pendulum. (a) False (b) True
21. 21.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) a spoon (c) a balloon (d) honey
22. 22.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) evaporation (c) capillary action (d) melting
23. 23.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
24. 24.True or false: a big sugar cube dissolves faster. (a) True (b) False
25. 25.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) yeast (d) a round pencil
26. 26.True or false: wiping up spills at once is an unsafe habit. (a) False (b) True
27. 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is kept the same. (a) True (b) False
28. 28.🧺 Do we need turmeric powder for the periscope? (a) needed (b) not needed
29. 29.🛟 Before starting any experiment, what is the first safety step? (a) ask an adult (b) start right away (c) hide it from adults (d) skip the reading
30. 30.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
31. 31.🚁 Which of these falls fast through the air? (a) an open sheet of paper (b) a coin (c) a toy parachute (d) a paper helicopter
32. 32.🌉 Does one flat sheet make a strong or a weak bridge? (a) weak bridge (b) strong bridge
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) a balloon (d) dry yeast
34. 34.True or false: a drinking straw is needed for the balloon rocket. (a) True (b) False
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) warm water (d) yeast
36. 36.🛟 Which of these sinks in water? (a) a piece of thermocol (b) a dry leaf (c) a pebble (d) a ping-pong ball
37. 37.🧺 Do we need yeast for the periscope? (a) not needed (b) needed
38. 38.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) do not lick the spoon (c) pour it on the floor (d) throw the glass
39. 39.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) curd (d) orange juice
40. 40.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is what we measure. (a) False (b) True

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