<span>C. They were produced as a byproduct of photosynthesis.</span>
Answer:
Mercator Projection
Explanation:
Since the beginning of time people have struggled with how to represent the surface of the earth on a plane.
The major problem is that the earth is round while the plane is not, making difficult to express exact distance and proportion.
Overtime different type of projections have been studied in order to pursue different objectives: the Mercator projection has straight parallel lines and is often used for ship navigation.
It was invented by Gerardus Mercator in 1569, and it's one of the most common representation of the earth.
It is used for navigation purpose because it helps navigator design straight lines, but it has some major issues in terms of disproportion between places.
A convection current is caused by differences in "temperature".
<u>Option: A</u>
<u>Explanation:</u>
The convection current is the outcome of variations in temperature. Like hot substance which is less denser, it rises while cool material which is more denser, it sinks. It is this motion that produces circulating processes in the environment, in water and in the Earth's mantle identified as convection currents. When air heats up it increases in the atmosphere, enabling colder air to circulate in below. This air flow generates waves, together with the Earth spinning. In effect, winds produce surface waves over the ocean.
Answer:
A large young population will strain the food supply in Nigerś economy. There will be a drastic increase in the cost of education and feeding.
Answer: B
Explanation:
A galaxy is a system of solar systems and other stars. Galaxies, like solar systems, are held together by gravity. In galaxies, the solar systems are separated by vast sections of mostly empty space. The galaxy that contains the Earth and its solar system is called the Milky Way.
