Q: Answer the following question given this paragraph: A lever is a simple machine consisting of a bar that rotates around a fixed point. The fixed point of a lever is called the fulcrum. Like other machines, a lever makes work easier by changing the force applied to the machine or the distance over which the force is applied. For a video introduction to levers using skateboards as examples, go to this URL:. Q: What do you call the fixed point of a lever? A:

OPTIONS:
- base
- caliper
- apex
- fulcrum

A: fulcrum

Q: Answer the following question given this paragraph: Earth is spinning as air moves over its surface. This causes the Coriolis effect. Winds blow on a diagonal over the surface due to Coriolis effect. From which direction do the northern trade winds blow?. Q: Earth spinning as air moves over its surface causes what? A:

OPTIONS:
- seasons
- centrifugal effect
- axial tilt
- coriolis effect

A: coriolis effect

Q: Answer the following question given this paragraph: Eventually plants evolved. Plants produce oxygen as a product of photosynthesis. Oxygen spread around the planet about 2.5 billion years ago. Many organisms died off because they could not handle the oxygen. But this development was extremely important for other life. Animals need oxygen to breathe. If photosynthesis had not evolved there would be no animals. Q: Because it produces oxygen, what plant process was necessary for the evolution of animals? A:

OPTIONS:
- germination
- death
- reproduction
- photosynthesis

A: photosynthesis

Q: Answer the following question given this paragraph: Sun, Moon, and stars appear to travel from east to west each day. Q: Which direction does the sun, moon, and stars appear to travel? A:

OPTIONS:
- south to north
- west to east
- north to south
- east to west

A:
east to west