1. water, a natural resource, is (1 point)
renewable
non-renewable
2. rainforests are destroyed due to what harmful business practice? (1 point)
over-fishing and over-hunting
building cities and businesses
industrial agriculture and farming
3. true or false: habitat extinction occurs only in rainforests. (1 point)
true
false

Compounds which are found naturally in the earth are called: a. ores b. composites c. rocks d. minerals

The causes of the failure of the league of nations

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.