Which is the best definition of wind?
a.
the vertical movement of air
b.
the horizontal movement of air
c.
the westerly movement of air above the earth's surface
d.
the movement of air between two objects that are in contact

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.