17.1 Test Review Question Preview (ID: 14504)

Solar System Gravity Law Of Universal Gravitation Orbit/Revolution Rotation Size/Distance.[print questions]

The Sun, planets and their moons, and a large collection of smaller objects such as asteroids, comets, and meteors are, together, called the:
a) universe
b) galaxy
c) solar system
d) nebulae

A unit used to measure long distances, equivalent to the distance from the Sun to Earth, is known as the:
a) light year
b) cosmic scale
c) astromonical unit
d) sidereal year

All of these objects in the night sky are seen because they reflect light EXCEPT:
a) Earth's moon
b) venus
c) stars
d) Mercury

The force of gravity between two objects will be greatest if their masses are:
a) small and they far apart.
b) large and they are close together.
c) large and they are far apart.
d) small and they are close together.

The length of a planet’s year is defined by its:
a) mass
b) period of rotation
c) density
d) period of revolution

The length of a planet’s day is defined by its:
a) mass
b) period of rotation
c) density
d) period of revolution

Orbital motion of the planets is caused by the interaction between inertia and:
a) gravitation force
b) the Sun's energy
c) frictional forces
d) the strong nuclear force

If an astronaut weisghts 1200 N on Earth, on the Moon he will weight about:
a) 100 N
b) 400 N
c) 200 N
d) 2400 N

The strength of the gravitational force between objects is determined by the distance between the objects and their
a) masses
b) inertias
c) sizes
d) densities

One AU is equivalent to 150 million kilometers. If Pluto is 40 AU from the Sun, how far is Pluto from the Sun measured in kilometers?
a) 6,000,000,000 km
b) 600 km
c) 6,000,000 km
d) 6,000,000

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