What is the definition for isthmus?

long, but narrow, topographical depression

formed by sediment from plant and animal remains

narrow strip of land connecting two landmasses

group of islands

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies?

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.

Me answer as many as you can what percentage more of water is used to provide us with electricity versus for irrigation? do we use more freshwater in our homes or to provide us with electricity?