Question 1 of 10
On a topographic map, contour lines that are spaced very close together indicate:
Aa body of water
Ba gentle slope
Cperfectly flat land
Da steep slope
Explanation
Closely spaced contour lines mean elevation changes rapidly over a short distance — a steep slope.
Question 2 of 10
Using the labeled contour lines on the map, what is the contour interval? 
A20 feet
B10 feet
C40 feet
D80 feet
Explanation
The contour interval is the elevation change between adjacent lines: 20 − 0 = 20.
Question 3 of 10
A barometer is an instrument used to measure:
Aair pressure
Brelative humidity
Cair temperature
Dwind speed
Explanation
A barometer measures atmospheric (air) pressure.
Question 4 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 5 of 10
As the temperature of air increases, the maximum amount of water vapor the air can hold:
Adrops to zero
Bstays the same
Cincreases
Ddecreases
Explanation
Warmer air can hold more water vapor before becoming saturated.
Question 6 of 10
As altitude increases within the lower atmosphere, air pressure generally:
Astays constant
Bincreases
Cdoubles
Ddecreases
Explanation
There is less air above you at higher altitudes, so air pressure decreases.
Question 7 of 10
The shape of the orbits of the planets around the Sun is best described as:
Aa square
Ba perfect circle
Ca straight line
Dan ellipse
Explanation
Planetary orbits are ellipses (slightly elongated circles), with the Sun at one focus.
Question 8 of 10
Approximately how long does one complete revolution of Earth around the Sun take?
A27.3 days
B30 days
C365¼ days (one year)
D24 hours
Explanation
One revolution (orbit) of Earth around the Sun takes about 365¼ days — one year.
Question 9 of 10
The topographic map shows four locations labeled A, B, C, and D. At which location is the land surface STEEPEST? 
AB
BC
CA
DD
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 10 of 10
About how long does it take Earth to ROTATE once on its axis?
A12 hours
B24 hours
Cabout one month
D365 days
Explanation
One rotation of Earth on its axis takes about 24 hours, producing day and night.