Science true or false

False.
Explanation:
Soil has minerals in it. When rain or flood washes away the soil, the water ultimately collects in water bodies. The minerals and nutrients that were present in soil get transferred to water bodies in this process. These minerals and nutrients are used up by the aquatic organisms.

True.
Explanation:
Fertilizers and pesticides contain chemicals. Excess amount of these chemicals in the soil are harmful to microorganisms like bacteria, as a result of which they die.

True.
Explanation:
Heat from the sun and earth’s temperature collide to form wind.

False.
Explanation:
One chlorine atom destroys 100,000 ozone molecules when it combines with bromine atoms in the stratosphere. Compounds that release chlorine when they are exposed to UV light in stratosphere are called ozone-depleting Substances (ODS).

True.
Explanation:
It is the upper layer of earth’s crust in which plants grow. It is made oup of organic matter and consists of rocks and clay particles.

True.
Explanation:
75% of earth’s surface is covered with water and 96.5% of this water exists in oceans, 3.5% is fresh-water lakes and frozen water locked up in glaciers and the polar ice caps.

True.
Explanation:
Biosphere contains all the planet’s living things. It includes all the microroagnisms, animals, and plants of Earth.

False.
Explanation:
Sulphur dioxide and nitrogen oxides in the air mix with water, oxygen and other chemicals and fall on earth as acid rain.

True.
Explanation:
Methane is a component of natural gas. Unused methane, if leaks into the air, acts as a green house gas, it absorbs sun’s heat and warms the atmosphere thus causing global warming.

True.
Explanation:
Water is necessary for all life forms to sustain on earth. Plants grow when they get sufficient amount of water for carrying out photosynthesis. Similarly, animals and human beings need water to drink and for other purposes. Rainfall is one o the major sources of water. High amount of rainfall will help in all the life forms to flourish.

True.
Explanation:
Gaia hypothesis was proposed by James Lovelock. The hypothesis is describes as viewing the earth as a single organism.

False.
Explanation:
Ozonsphere is located in the stratosphere of atmosphere from 20 to 30kms above earth.

True.
Explanation:
Rhizobium leguminosarum is a gram negative soil bacteria that fix nitrogen.

False.
Explanation:
Clouds are formed in troposphere of atmosphere. The bottom of troposphere is at earth’s surface. All weather phenomenons occur in troposphere.

True.
Explanation:
Combustion is a exothermic reaction between a reductant and oxidant (oxygen), that produces carbon dioxide and water.