What fraction of the most important prescription drugs come from wild species?
a more than half
b less than a fourth
call prescription drugs

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?