D. three-quarters of earth's water is fresh water.
Answer:
"The tilt of the Earth's spin axis with respect to the plane of its orbit about the sun (the ecliptic plane) is important for a habitable Earth. The Earth's spin axis is tilted 23.5° with respect to the ecliptic, giving moderate seasons and preventing temperature extremes anywhere on the planet"
Explanation:
Answer: About 1/3 of the co2 produced by humans during the past century has been absorbed by the ocean.
Answer: O
Explanation:
The stars which emit the most blue light are the hotter stars and O type stars are the hottest stars there are.
O stars are larger than every other star and have surface temperatures ranging above 25,000K as well as being extremely bright.
They therefore emit the most blue light and the least red light.
Answer:
Option: A. GPS
Explanation:
The satellite mentioned in this question is the artificial satellites, which used in communications, navigation and weather forecasting. The satellite used in telecasting television and making phone calls. For spying and photography in military bases in hostile countries by the defence. It is also helpful in observing weather, storms, and rains. In the field of navigation, it utilized in the form of the Global Positioning System (GPS) which help people in finding routes and roads. GPS helps in locating location and telling where you are. It is a sort of a map that gives you a way to find your path in unknown or known areas.
