Question 1 of 10
Using the labeled contour lines on the map, what is the contour interval? 
A20 feet
B80 feet
C10 feet
D40 feet
Explanation
The contour interval is the elevation change between adjacent lines: 20 − 0 = 20.
Question 2 of 10
The shape of the orbits of the planets around the Sun is best described as:
Aa square
Ba straight line
Can ellipse
Da perfect circle
Explanation
Planetary orbits are ellipses (slightly elongated circles), with the Sun at one focus.
Question 3 of 10
The apparent daily motion of the Sun across the sky (rising in the east and setting in the west) is caused by:
AEarth's revolution around the Sun
Bthe Sun orbiting Earth
Cthe gravitational pull of the Moon
DEarth's rotation on its axis
Explanation
Earth rotates west-to-east on its axis, making the Sun appear to move east-to-west each day.
Question 4 of 10
Approximately how long does one complete revolution of Earth around the Sun take?
A365¼ days (one year)
B27.3 days
C30 days
D24 hours
Explanation
One revolution (orbit) of Earth around the Sun takes about 365¼ days — one year.
Question 5 of 10
On a topographic map, contour lines that are spaced very close together indicate:
Aa body of water
Bperfectly flat land
Ca steep slope
Da gentle slope
Explanation
Closely spaced contour lines mean elevation changes rapidly over a short distance — a steep slope.
Question 6 of 10
The topographic map shows four locations labeled A, B, C, and D. At which location is the land surface STEEPEST? 
AD
BB
CC
DA
Explanation
Contour lines bunched close together show a steep slope (large elevation change over a short horizontal distance). They are closest at point A.
Question 7 of 10
As altitude increases within the lower atmosphere, air pressure generally:
Adoubles
Bincreases
Cdecreases
Dstays constant
Explanation
There is less air above you at higher altitudes, so air pressure decreases.
Question 8 of 10
As the temperature of air increases, the maximum amount of water vapor the air can hold:
Adecreases
Bincreases
Cstays the same
Ddrops to zero
Explanation
Warmer air can hold more water vapor before becoming saturated.
Question 9 of 10
A barometer is an instrument used to measure:
Awind speed
Brelative humidity
Cair temperature
Dair pressure
Explanation
A barometer measures atmospheric (air) pressure.
Question 10 of 10
About how long does it take Earth to ROTATE once on its axis?
Aabout one month
B24 hours
C365 days
D12 hours
Explanation
One rotation of Earth on its axis takes about 24 hours, producing day and night.