Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 4 · 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.🌈 In VIBGYOR, what number colour is indigo?
2. 2.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
4. 4.True or false: curd is neutral. (a) False (b) True
5. 5.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) cooking an egg (d) melting ice
6. 6.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a bicycle pump (c) a compass needle (d) a magnetic pin holder
7. 7.🔍 Which is the odd one out? (a) butter paper (b) frosted glass (c) clear glass (d) oily paper
8. 8.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) ice cubes (c) a magnet (d) sunlight
9. 9.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) False (b) True
12. 12.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is what we measure. (a) True (b) False
13. 13.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the kind of sugar (b) time to dissolve (c) the stirring (d) the water temperature
14. 14.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is the one thing we change. (a) True (b) False
15. 15.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) orange (c) violet (d) red
16. 16.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes much farther (b) it flies off the string (c) it turns into a kite (d) it goes less far
18. 18.🔭 Which of these reflects light well? (a) dark soil (b) black cloth (c) still clear water (d) a rough wooden board
19. 19.🔍 Which is the odd one out? (a) butter paper (b) air (c) clear glass (d) clear plastic film
20. 20.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) how big we blow it (b) the same straw (c) distance it travels
21. 21.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.🛟 Which of these is an unsafe habit? (a) tying back long hair (b) working with no adult (c) asking an adult first (d) washing hands afterwards
23. 23.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) vinegar (c) a few hours (d) a mirror
24. 24.🧺 Which of these is needed for the shadow clock? (a) yeast (b) a balloon (c) turmeric powder (d) a sunny open place
25. 25.🔮 Predict: on a fully cloudy day, the sundial ___. (a) runs faster (b) does not work well (c) shows two times (d) works better
26. 26.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) sharp kitchen shears (c) a paper cutter (d) safety scissors
27. 27.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of the layers (b) the order of pouring (c) how much of each liquid
28. 28.🛟 Static from a comb is safe. Which electricity must children never play with? (a) plug points at home (b) a rubbed plastic comb (c) a rubbed balloon (d) paper bits on a comb
29. 29.🧺 Which of these is needed for the paper bridge? (a) yeast (b) a magnet (c) a balloon (d) a ruler
30. 30.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a clean glass (c) sand and pebbles (d) a magnet
31. 31.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) honey (c) a teaspoon (d) two clear glasses
32. 32.⚖️ 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) the shape of the clay (c) whether it floats
33. 33.📘 What is it called when water climbs up thin tubes or paper by itself? (a) capillary action (b) melting (c) evaporation (d) magnetism
34. 34.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) eat a few to check (c) never put seeds in mouth (d) feed them to pets
35. 35.🔍 Which is the odd one out? (a) one flat sheet (b) a wet flat sheet (c) rolled paper tubes (d) a torn flat sheet
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) turmeric powder
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) sunlight (b) air (c) warmth (d) water
39. 39.🧺 Three of these are needed for the magnet test. Which one is NOT needed? (a) a bar magnet (b) test objects (c) vinegar (d) a results chart
40. 40.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed

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