Sea animals and plants use substances dissolved in earth's to form bones and shells.

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

20 the compound al(nh3)2 has atoms of nitrogen.

As the earth formed, the force of gravity increased due to increased mass. what effect did this increased gravity have on the forming planet?