Answer:
A. A meteor
What is the difference between a meteor and a meteoroid?
Meteoroids are objects in space that range in size from dust grains to small asteroids. Think of them as “space rocks." When meteoroids enter Earth's atmosphere (or that of another planet, like Mars) at high speed and burn up, the fireballs or “shooting stars” are called meteors.
A. person leans on/pushes a brick wall
b. walking in sand
c. turning on a fan
D. person running into a wall
The ultimate source of energies for fossil fuels, solar cells and windmills is the solar energy.
The sun is the ultimate source of energy for our planet. It is an alternative energy resource that cause no pollution and is <span>environment friendly. </span>
The answer is b. ionizing radiation
The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat.