St. Britto Hr. Sec. School - Madurai
8th Science Model Exam - 1-Aug 2020
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How are they preparing pickles? What are the causes involved in that?
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How many classes are there in Bryophytes? What are they?
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Define - mole.
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Is there any possibility of making a special device to measure the magnitude of friction directly?
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Write a short note on bacteria and its structure.
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Describe an experiment to prove that friction depends on the nature of a surface.
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Explain the working of a periscope.
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Explain how friction can be minimised.
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Assertion: Electric current, amount of substance, Luminous Intensity are the fundamental physical quantities.
Reason: They are independent of each other.
a. If both assertion and reason are true and reason is the correct explanation of the assertion.
b. If both assertion and reason are true but reason is not the correct explanation of the assertion.
c. Assertion is true, but reason is false.
d. Assertion is false, but reason is true. -
Assertion: Water strider slides easily on the surface of water.
Reason: Water strider experiences less buoyant force.
a. If both assertion and reason are true and the reason is the correct explanation of the assertion.
b. If both assertion and reason are true, but the reason is not the correct explanation of the assertion.
c. If the assertion is true, but the reason is false.
d. If the assertion is false, but the reason is true. -
a) In Bryophytes – Gametophytes - Sex organ – Gamete fusion – Zygote - Spore mother cell – spore – Thallus.
b ) In Angiosperm – pollination – fertilization – zygote – new plant.
c) In Gymnosperm – male cone, and female cone – microspore and megaspore – Zygote – new sporophytes plant.
d) In pteridophytes – pollination by wind, fertilization in the presence of water – zygote prothallus, new plant.
1) a, b, c 2) a, b 3) c, d 4) b, d