Carbon dioxide is a greenhouse gas that helps to trap heat in Earth's atmosphere. We need some CO2 in the atmosphere to maintain a warm planet, but excess
carbon can cause considerable warming of the planet.
A What fossil fuel usage will result in no change in atmospheric CO2 each year?
B. What percentage decrease in fossil fuel usage is required to achieve this goal?

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano