f an alien is 50 light years away from the Earth, watching Earth through a very strong telescope, when will he be able to see the events that happened today, through his telescope? Why did you choose that date??

In the african savanna, more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

How does human environment effect the biosphere