Define the term climate change and briefly explain why it is important ​

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.

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false

If scientists only detect p waves in a certain layer of earths interior what does that tell us?