Studying Earth

What is the shape of the Earth?

• flat

• oblate spheroid

• obtuse spheroid

• sphere

How many oceans does Earth have?

• 4

• 5

• 6

• 7

How many continents does Earth have?

• 4

• 5

• 6

• 7

How many minutes are in 1 degree of latitude or longitude?

• 60

• 10

• 100

• 25

Which map projection can be used to draw a great circle (shortest distance between points on Earth) as a straight line?

• azimuthal

• conic

• cylindrical

You see two topographic maps. The first map has a contour interval of 20 feet. A second has a contour interval of 50 feet. Which mapped area is probably flatter?

• the first

• the second

• it's impossible to tell

How many compositional layers does the Earth have?

• 3

• 4

• 5

• 6

How many structural layers does the Earth have?

• 3

• 4

• 5

• 6

What are the two sources of most energy on Earth?

• gravitational energy from the sun and the moon

• plants and animals

• oil and gas

• solar energy and radiation from Earth's core

Is Earth considered an open system or a closed system?

• closed

• open

• it depends on the season