Exam 2

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

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

C  planets move in elliptical orbits around the sun.

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

A  low temperature and low density

B  high temperature and high density

C  low temperature and high density

D  high temperature and low density

A  flares

B  supergranules

C  spicules

D  prominences

E  solar wind

A  attract, positive

B  repel, positive

C  attract, negative

D  repel, negative

A  nuclear fusion

B  nuclear fission

C  nuclear recombination

D  nuclear splitting

A  chromosphere.

B  core.

C  corona.

D  photosphere.

A  core temperature and surface temperature

B  pressure and gravity

C  radiation and heat

D  heat and rotation

A  granules.

B  solar prominences.

C  the corona.

D  sunspots.

E  solar flares.

A  50

B  120

C  30

D  200

E  150

A  one week

B  two weeks

C  one day

D  three weeks

E  a month

A  chromatic aberration

B  adaptive optics

C  spherical aberration

D  photometry

E  active optics

A  Gamma-rays

B  X-rays

C  Ultraviolet light

D  Infrared radiation

A  a large diameter refracting telescope.

B  a small diameter refracting telescope.

C  a large diameter reflecting telescope.

D  a small diameter reflecting telescope.

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

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

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

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

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

A  core collapse device.

B  charge-coupled device.

C  photometer.

D  spectrograph.

A  four or more

B  three

C  two

D  None of the above.

A  TRUE

B  FALSE

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

B  the sun emits more infrared radiation than ultraviolet radiation.

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

D  carbon dioxide is transparent to infrared radiation and opaque to ultraviolet 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 has both a liquid and solid core

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

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

A  differentiation

B  cratering

C  flooding

D  fusion of hydrogen to helium

E  slow surface evolution

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

B  it was liquid at some point in the past

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

D  it has both a liquid and solid core

A  FALSE

B  TRUE

A  celestial pole

B  zenith

C  equinox

D  meridian

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

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

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

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

A  Neptune

B  Saturn

C  Earth

D  Jupiter

E  Mars

A  Disks are rare around young stars.

B  Planets are round.

C  Disks are common around young stars.

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

A  Earth

B  Uranus

C  Mars

D  Mercury

E  Jupiter

A  Pluto

B  asteroids

C  comets

D  Saturn

E  Venus

A  radioactive dating of rocks retrieved from the Moon

B  carbon dating of rocks from mountains on the Earth

C  measurement of the magnetic field variations on the sea floor

D  measuring the number of craters per square meter on Mercury

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  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

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

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