The sun appears to cross the plane of Earth's equator
when it reaches either one of the "equinox" points in the sky.
<span>A scientist measured an increase in nitrous oxide in the atmosphere. This increase would result in the greenhouse effect. </span>
<span>Histidine is what it would produce.</span>
Groundwater is the water found underground in the cracks and spaces in soil, sand, & rock.
