<span>A. The African plate is breaking apart to form two separate plates.</span>
Answer:
A: Heat flows in all directions
D: The atoms near the candle absorb heat first
F: Heat flows from the warmer atoms to the cooler atoms
Explanation:
<span>Most of the nitrogen gas in Earth's atmosphere comes from _____.
</span>
<span>
D. the breakdown of carbon dioxide</span>
A: In a lab a scientist measures the height of roses that received different fertilizers.
An experiment must include variables. The other three are just measurements, but since the scientist is varying the types of fertilizers used, this better describes an experiment. It is also done in a controlled environment (in a lab) which helps to eliminate other uncertainties.
<span>The contraction of the diaphragm causes an increase in the height of the thoracic cavity. Contraction of the intercostal muscles causes the diameter of the thoracic cavity to increase. The increased thoracic cavity volume brings a volume increase in intrapulmonary volume, which causes a drop in pressure relative to atmospheric pressure. Air rushes into lungs along this pressure gradient until intrapulmonary and atmospheric pressure are equal.</span>