What two important factors determine the nature of an ecosystem?
a Temperature and humidity
C, Recycling of nutrients and flow of energy
b. Light and temperature
d. Flow of energy and predation

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

The radius of an atom is closest in size to a