EQUINOX occurs then; when days and nights are equal
B.) "Equator" <span>divides our planet into the northern hemisphere and the southern hemisphere
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Greenhouse emissions of tar sand, per barrel, are more than conventional crude oil. This is because, it takes more energy to extract the bitumen from the tar sand and more so, to convert the bitumen to usable oil taking up even more energy. This energy is usually derived from burning natural gas. Emissions by tar sand are approximately 100 kg CO2 per barrel while conventional oil is approximately 30 kg CO2 per barrel.
Answer:
Scientists separate the earth between the inner layers and outer layers. And the outer layers are separated into "spheres."
Explanation:
The scientist's basic considerations are to identify, describe and classify all the characteristics of the Earth, to generate hypotheses to justify its existence and growth, and to devise ways of testing the relative validity of competing opinions. Thus the most realistic, appropriate, and lasting ideas will be created. Earth is a big planet and so doesthe environment around it. Scienticist classify the planet into different spheres to make it study more efficient by using scitific methods deplyed at each sphere.