A. sedimentary rocks B. igneous rocks C. metamorphic rocks D. all of these Which

Question

A. sedimentary rocks

B. igneous rocks

C. metamorphic rocks

D. all of these

Which of the following is an example of physical weathering?

A. frost wedging

B. dissolution

C. oxidation

all of these

D. none of these

E. none of these

A.

calcium carbonate

B. humus

C. iron

D. salt

The remaining amount of carbohydrate after Energy and Matter Flow in Ecosystems is the:

A. chloroplasts

B. net photosynthesis

C. gross photosynthesis

D. biotic pyramid

The largest storage pool for the nitrogen in Energy and Matter Flow in Ecosystems is the:

A. ocean

B. vegetation

C. legumes

D. atmosphere

A. sedimentary rocks

Explanation / Answer

1)a -sedimentary rocks . as the sedimentary rocks in other form changes into metamorphic rocks due to higher pressure and temperature.So the mineral composition will change to metamorphic rocks.As it is a cycle which all the three converts into another.Metamorphism process mainly occurs by conversion of sedimentary rocks deeply burried into metamorphic rocks.

2)a-frost wedging.It is a process where water in rocks freezes and make the rock to expand.

3)c- iron.

red soils are usually high in iron content and are used for crops like Bengal gram,groundnut.

4) b- net photosynthesis. It is the remaining carbohydrate after energy and matter flow in ecosystem.

5)d-atmosphere.

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