Exam 2

A  uniform circular motion is adequate to describe the motion of all planets.

B  the planets all move around the Earth in elliptical orbits.

C  the planets move at a constant speeds at all points in their orbits.

D  planets move in elliptical orbits around the sun.

A  low temperature and high density

B  high temperature and low density

C  high temperature and high density

D  low temperature and low density

A  spicules

B  supergranules

C  prominences

D  flares

E  solar wind

A  repel, negative

B  attract, negative

C  repel, positive

D  attract, positive

A  nuclear fission

B  nuclear fusion

C  nuclear splitting

D  nuclear recombination

A  corona.

B  photosphere.

C  core.

D  chromosphere.

A  pressure and gravity

B  heat and rotation

C  core temperature and surface temperature

D  radiation and heat

A  the corona.

B  solar flares.

C  solar prominences.

D  granules.

E  sunspots.

A  120

B  200

C  30

D  50

E  150

A  three weeks

B  one week

C  one day

D  two weeks

E  a month

A  active optics

B  photometry

C  adaptive optics

D  chromatic aberration

E  spherical aberration

A  Ultraviolet light

B  X-rays

C  Gamma-rays

D  Infrared radiation

A  a small diameter refracting telescope.

B  a small diameter reflecting telescope.

C  a large diameter refracting telescope.

D  a large diameter reflecting telescope.

A  Radio waves would have a lower energy and would travel slower than gamma rays.

B  Radio waves would have a longer wavelength and travel the same speed as gamma rays

C  Gamma rays would have a shorter wavelength and a lower energy than radio waves.

D  Radio waves would have a shorter wavelength and higher energy than gamma rays.

E  Gamma rays would have a lower frequency and travel the same speed as radio waves.

A  photometer.

B  spectrograph.

C  charge-coupled device.

D  core collapse device.

A  two

B  three

C  four or more

D  None of the above.

A  FALSE

B  TRUE

A  carbon dioxide is transparent to infrared radiation and opaque to ultraviolet radiation.

B  the sun emits more infrared radiation than ultraviolet radiation.

C  ozone is transparent to infrared radiation and opaque to ultraviolet radiation.

D  carbon dioxide is transparent to visible light and opaque to infrared radiation.

E  ozone is transparent to visible light and opaque to infrared radiation.

A  it was liquid at some point in the past

B  it formed first from denser material and then afterward accreted lighter material

C  it has both a liquid and solid core

D  only the crust is solid; the rest of Earth’s interior is liquid

A  fusion of hydrogen to helium

B  differentiation

C  cratering

D  slow surface evolution

E  flooding

A  it was liquid at some point in the past

B  it has both a liquid and solid core

C  it formed first from denser material and then afterward accreted lighter material

D  only the crust is solid; the rest of Earth’s interior is liquid

A  FALSE

B  TRUE

A  zenith

B  equinox

C  celestial pole

D  meridian

A  These gases were more abundant in the outer regions of the accretion disk where the outer planets formed.

B  Frequent early collisions by comets with the inner planets caused most of their original atmospheres to dissipate.

C  The outer planets grew massive quickly enough to gravitationally hold on to these gases before the solar wind dispersed the accretion disk.

D  The inner planets were too close to the Sun, and solar winds blew away their original gaseous atmospheres.

A  Mars

B  Jupiter

C  Saturn

D  Neptune

E  Earth

A  The sun is the least massive object in the solar system.

B  Disks are rare around young stars.

C  Disks are common around young stars.

D  Planets are round.

A  Earth

B  Mercury

C  Jupiter

D  Mars

E  Uranus

A  Saturn

B  Pluto

C  Venus

D  asteroids

E  comets

A  measurement of the magnetic field variations on the sea floor

B  radioactive dating of rocks retrieved from the Moon

C  measuring the number of craters per square meter on Mercury

D  carbon dating of rocks from mountains on the Earth

A  samples of earth rocks.

B  samples of lunar rocks.

C  samples of meteorites.

D  none of the above

E  all of the above

A  Space debris was formed by the collision of objects after the planets formed.

B  Space debris is left over material from the early solar system that never formed into a planet.

C  Both Space debris is left over material from the early solar system that never formed into a planet and Space debris was formed by the collision of objects after the planets formed are correct

D  All of the above.

A  very few satellites

B  low average density

C  small diameters

D  craters in old surfaces

E  orbits inside the asteroid belt