1. What are strata? 2. Where are the oldest fossils based on Steno’s ideas?

3. Geologists were unable to compare rocks from one location to another. William Smith figured out how to match the ages of layers of rock by comparing within the layers.

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Diffusion and osmosis are forms of passive transport