ASTRONOMY TEST 6

all of the above

A theory is

30 m

An ocean wave is traveling at 6.0 m/s. What is the wavelength of the ocean wave if its frequency 0.20 Hz?

once every 10 years

Approximately how often does a spectacularly active, visible comet appear?

rock.

Asteroids are primarily composed of

the cosmological principle

Because of _____________, we can conclude that gravity works the same way on Earth as it does on Mars.

it was the first comet whose return was predicted.

Comet Halley is unique because

they have organic molecules mixed with ice.

Comet nuclei, absent their tails, are very dark because

planet must pass directly in front of the star.

Detecting a planet around another star using the transit method is difficult because the

in the same direction

How do regular moons rotate in comparison to their planets?

a chondrite meteorite

Identify the object shown in the figure.

decrease its orbital speed.

If we wanted to increase the Hubble Space Telescope's altitude above Earth and keep it in a stable orbit, we also would need to

after the spacecraft passed the planet.

If you wanted to search for faint rings around a giant planet by sending a spacecraft on a flyby, it would be best to make your observations

its interior is tidally heated as it orbits around Jupiter.

Io has the most volcanic activity in the Solar System because

M-type

Iron meteorites are fragments of which type of asteroid?

that is the direction toward which Earth is traveling.

Meteor showers appear as if they are coming from one particular place in the sky because

water ice.

Of what are Saturn's rings primarily made?

the early universe.

Particle accelerators that smash atoms or particles together at high speeds, such as the Large Hadron Collider (LHC), are important tools used for simulating conditions in

a rocky core surrounded by ice.

Pluto is composed primarily of

of collisions between ring particles.

Rings of giant planets are very thin compared to their diameters mainly because

Earth passes through a cloud of debris left behind by Comet Thatcher.

The Lyrid meteor shower occurs every year on approximately April 21 because

10 km

The nucleus of the typical comet is approximately _________ in size.

Mercury and Venus.

The only planet(s) without a moon is (are)

Volcanoes on Titan periodically release new methane into the atmosphere.

Titan's thick atmosphere is believed to have been created when ultraviolet photons broke apart methane molecules, ultimately creating the observed smoglike conditions. However, this process would likely remove all of the atmospheric methane in roughly 10 million years, yet we still see its presence today. What is the most likely cause?

False

True or False, the current warming trend experienced on Earth is a result of the Sun putting out more radiation.

The orbital plane of the rings was seen edge-on, and the rings were too thin to be visible.

Two years after first being observed, astronomers reported that Saturn's rings vanished. What happened to them?

asteroids

What is the main source of meteors?

They can live in extreme conditions, such as very low or high temperature environments, oxygen-poor environments, or environments with extremely low light levels.

What makes extremophile organisms different from other life forms?

Lakes of methane, ethane, and other hydrocarbons

What sort of liquids do astronomers believe exist on Saturn's moon, Titan?

All of them

Which giant planets have rings?

chondrite

Which group of meteorites represents the conditions in the earliest stages of the formation of the Solar System?

asteroids

Which of the following types of solar system debris were not discovered until the age of telescopes?

stony

Which type of meteorite is most commonly found on Earth?

Galileo

Who first discovered moons around a planet in our Solar System other than Earth?

The interiors of these moons are heated by the rapidly changing direction and strength of tidal forces from Jupiter, resulting in geological activity

Why are some moons such as Io and Enceladus geologically active even though they are small in size compared to the planets?

Being the most massive planets in the solar system, they were able to gather more material to form moons than the terrestrial planets

Why do the giant planets have the largest share of moons in the solar system?

Dust particles are more massive than ions, so their accelerations are less.

Why does the dust tail separate from the ion tail?