class 8 science chapter 10 mcq
28 Heliocentric theory was proposed by
1. Albert einstein
2. Robert clins
3. Copernicus
4. f.cojori
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27 The following one is used to measure liquids in laboratory
1. measuring cylinder
2. spring balance
3. buret
4. both 1 and 3
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26 ' Supersonics ' are
1. instruments
2. jet planes
3. missiles
4. none
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25 The following one is used to measure time in the laboratory
1. wall clock
2. time clock
3. wrist clock
4. stop clock
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