Answer:
The average luminance of the Sun is about 1.88 giga candela per square metre, but as viewed through Earth's atmosphere, this is lowered to about 1.44 Gcd/m2. However, the luminance is not constant across the disk of the Sun (limb darkening).
Explanation:
Answer:
1. If developed due to the practice of farming, cultivation of the soil for the growing of crops. Similarly, individuals have learned how to use animal to provide food, wool, and other necessities.
2. Obviously, the practice of agriculture is essential in sustaining human life. However, these practices often leave negative impact on the environment. The most prominent of these effects includes climate change, deforestation, pollution, and other unfortunate events.
3. This is due to the fact that different areas harvest different crops, evidently leading to various different foods.
4. Agriculture differs in those regions for developing ones evidently don't have as much experience as those that are already established. It will take a deal of time for them to develop similar foods as the other already developed regions.
5 + 6 Don't know.
Answer:
The Precambrian history of Earth is difficult to determine for all of the following reasons except e. There are few useful index fossils in the Precambrian record .
Explanation:
Precambrian history
Precambrian history is difficult to study as there are relatively low Precambrian fossils and most of the Precambrian rocks have metamorphosed and ,
there are few useful index fossils in Precambrian record as it is well known the evolution of life on earth was not very predominant in Precambrian time.
