Question

question 7
the ___ is an apparent force associated with the rotation of the earth.
a pgf = pressure gradient force
b cf = coriolis force
c fr = frictional force
d gr = gravitational force

question 8
the ___ is strongest near the earths surface and decreases in importance at higher altitudes.
a pgf = pressure gradient force
b cf = coriolis force
c fr = frictional force
d gr = gravitational force

Explanation:

• Question 7: The Coriolis Force (CF) is an apparent force that arises due to the rotation of the Earth. It affects the motion of objects in a rotating frame of reference (like the Earth). The Pressure Gradient Force (PGF) is related to differences in air pressure, the Frictional Force (FR) opposes relative motion between surfaces, and the Gravitational Force (GR) is due to the mass of the Earth attracting objects.
• Question 8: The Frictional Force (FR) is strongest near the Earth's surface because there are more obstacles (like trees, buildings, terrain) that cause friction. As altitude increases, there are fewer of these obstacles, so the frictional force decreases in importance. The Pressure Gradient Force (PGF) is related to pressure differences, the Coriolis Force (CF) depends on the rotation of the Earth and the velocity of the moving object (not altitude in the sense of surface - related strength), and the Gravitational Force (GR) has a relatively small change with altitude in the context of the Earth's atmosphere (compared to frictional force changes).

Answer:

• Question 7: B. CF = Coriolis Force
• Question 8: C. FR = Frictional Force