Ques:Q: What are the two types of earth crust? Read this paragraph and choose the correct option from the provided answers: The crust is less than 1% of Earth by mass. The two types are oceanic crust and continental crust. Choices: - reflective and continental - micro and continental - amorphous and continental - oceanic and continental A:

Ans:oceanic and continental
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Ques:Q: What slow process is required for formation of soil? Read this paragraph and choose the correct option from the provided answers: Soil formation requires weathering. Where there is less weathering, soils are thinner. However, soluble minerals may be present. Where there is intense weathering, soils may be thick. Minerals and nutrients would have been washed out. Soil development takes a very long time. It may take hundreds or even thousands of years to form the fertile upper layer of soil. Soil scientists estimate that in the very best soil forming conditions, soil forms at a rate of about 1mm/year. In poor conditions, it may take thousands of years!. Choices: - leaching - digestion - fossilization - weathering A:

Ans:weathering
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Ques:Q: What are indestructible and constantly in motion? Read this paragraph and choose the correct option from the provided answers: Atoms are indestructible and constantly in motion. Choices: - viruses - crystals - ions - atoms A:

Ans:atoms
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Ques:Q: What must happen for two ions to form an ionic bond? Read this paragraph and choose the correct option from the provided answers: Choices: - two ions need to have the same charge - Two ions need to be the same size - two ions need to have neutral charges - two ions need to have opposite charges A:

Ans:
two ions need to have opposite charges
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