Space Quiz Questions and Answers
Questions: 16 · 10 minutes
1. What is primarily responsible for the reddish appearance of Mars?
Iron-bearing minerals that have oxidized in its surface material
Red light scattered by gases in its atmosphere
Large areas of red vegetation
A planet-wide layer of glowing lava
2. A command is transmitted from Earth to equipment on the Moon. Approximately how long does the radio signal take to arrive, ignoring processing delays?
About 0.13 seconds
About 8 minutes
About 13 seconds
About 1.3 seconds
3. Astronomers repeatedly observe a distant star becoming slightly dimmer at regular intervals. Which explanation is the transit method designed to test?
An orbiting planet is passing in front of the star
The star temporarily stops producing energy
A nearby galaxy periodically absorbs the star's light
The star is moving behind the Moon
4. How is the Milky Way generally classified by astronomers?
A planetary nebula
An elliptical galaxy
An irregular galaxy
A barred spiral galaxy
5. Astronauts aboard an orbiting space station appear weightless even though Earth's gravity remains strong there. What best explains this?
The station is beyond the reach of Earth's gravity
The station generates gravity that cancels Earth's gravity
The astronauts and station are continuously falling around Earth together
The vacuum of space removes the astronauts' weight
6. Earth is closest to the Sun in early January. Why is January still winter in much of the Northern Hemisphere?
The Sun produces less energy during January
The Moon blocks part of the Sun's heat
Earth's axial tilt points the Northern Hemisphere away from more direct sunlight
Earth rotates more slowly during January
7. Which process supplies most of the Sun's energy?
Chemical burning of solar gases
Nuclear fusion of hydrogen into helium
Nuclear fission of heavy elements
Friction between the Sun and surrounding space
8. What does a light-year measure?
Distance
Time
Brightness
Speed
9. Beyond the Sun, which individual star is nearest to our Solar System?
Sirius
Betelgeuse
Polaris
Proxima Centauri
10. About one week after a new moon, an observer sees half of the Moon's visible face illuminated and the lit portion is growing. Which phase is this?
Waning crescent
Full moon
First quarter
Third quarter
11. Two objects remain unchanged, but the distance between their centers doubles. According to the inverse-square relationship, what happens to their gravitational attraction?
It becomes one-quarter as strong
It becomes half as strong
It doubles
It remains unchanged
12. Which planet is closest to the Sun?
Earth
Venus
Mercury
Mars
13. An object follows a long orbit and develops a bright coma and tail as it approaches the Sun. What is it most likely to be?
A rocky planet
A comet
An artificial satellite
A neutron star
14. Earth moves directly between the Sun and the full Moon, causing the Moon to darken. Which event is occurring?
A solar eclipse
A lunar eclipse
A meteor shower
A planetary transit
15. Stars appear to move from east to west across the sky during a typical night. What mainly causes this apparent motion?
The stars orbit Earth once each day
Earth revolves around the Sun once each day
The Milky Way spins around Earth
Earth rotates from west to east
16. Two otherwise similar telescopes observe the same faint galaxy. Why can the telescope with the larger aperture usually reveal more detail?
It places the galaxy physically closer to the observer
It gathers more light and can provide finer resolution
It prevents Earth's atmosphere from affecting the observation
It makes light from the galaxy travel faster