Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 43 · 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.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
3. 3.🛟 What should you do with leftover materials at the end? (a) taste them (b) leave them out (c) hide them (d) clean up safely
4. 4.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the kind of ball”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🛟 Why must small magnets be kept away from little children? (a) they are too heavy (b) they smell bad (c) they are too hot (d) they may swallow them
6. 6.💧 Which of these lets water climb up it? (a) a steel spoon (b) a plastic ruler (c) a glass marble (d) a paper towel
7. 7.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) the amount of vinegar (c) size of the balloon (d) spoons of baking soda
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the kind of paper (b) the drop height (c) the paper clip (d) the length of the blades
12. 12.True or false: yeast is needed for the float-or-sink test. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) time (d) warm water
14. 14.True or false: air is denser than water. (a) False (b) True
15. 15.🥄 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.🥛 Which of these works by magnetism? (a) a drinking straw (b) a suction hook (c) a bicycle pump (d) a magnetic pin holder
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🍯 Which of these is less dense than water? (a) a coin (b) a pebble (c) a glass marble (d) an ice cube
19. 19.🧺 Which of these is needed for the float-or-sink test? (a) a battery cell (b) a mirror (c) small test objects (d) a magnet
20. 20.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a clear glass of water (c) yeast (d) a sunny window
21. 21.🌈 How many colours do we name in a rainbow (VIBGYOR)?
22. 22.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) salt water (c) lemon juice (d) soap solution
23. 23.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) yeast (c) a drinking straw (d) a balloon
24. 24.🛟 Which of these is a safe habit? (a) working with no adult (b) putting things in mouth (c) running with glassware (d) wiping up spills at once
25. 25.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.True or false: small test objects is not needed for the float-or-sink test. (a) True (b) False
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
28. 28.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
29. 29.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
30. 30.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) baking a cake (d) folding paper
31. 31.True or false: bran from wheat flour is done by sieving. (a) True (b) False
32. 32.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the floor surface”? (a) we change it (b) we measure it (c) we keep it the same
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a towel (c) a glass of water (d) a sink or a bucket
35. 35.🥄 Does sugar left unstirred dissolve faster or slower? (a) faster (b) slower
36. 36.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
37. 37.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the same stick is what we measure. (a) False (b) True
38. 38.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the amount of clay (b) whether it floats (c) the shape of the clay
39. 39.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) never look at the Sun (c) stare at the Sun (d) look at it through glass
40. 40.🧺 Three of these are needed for the paper bridge. Which one is NOT needed? (a) sheets of paper (b) two books (c) coins (d) a balloon

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