Which questions address social issues about conservation? Select all that apply.

Does protecting a species cause difficulty in a society?
Can protecting a species add to the amount of hunting and wildlife viewing?
Does protecting a species involve hidden costs?
Can protecting one species cause harm to another species?

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.

The layers of earth are based on what two sets of characteristics?

What is the approximate chemical composition of the solar nebula?