At one time, many scientists and philosophers believed earth was the center of the universe and all other planets and the sun revolved around it. to the invention of the new data was collected disprove this idea.
a) telescope
eliminate
b) microscope
c) stethoscope
d) oscilloscope

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

An easy way to calculate the amount of energy available at each level is to what?

Complete the statements to identify the first two steps of meiosis i. (1 ) the first and longest step of meiosis i is called i. (2)the second step of meiosis i is called i.