Properties Of The Universe Question Preview (ID: 34637)


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When we say an object is in orbit, we mean that it is traveling around another object in space. What do planets in a solar system orbit?
a) star
b) moon
c) galaxy
d) universe

Our solar system consists of eight planets. Each planet is classified as either a terrestrial planet or a gas giant planet. Which is a difference between these two types of planets?
a) Terrestrial planets are larger than gas giant planets.
b) Gas giant planets are denser than terrestrial planets.
c) Terrestrial planets have thinner atmospheres than gas giant planets.
d) Gas giant planets have rockier crusts than terrestrial planets.

A galaxy contains stars, gas, and dust. This matter must be held together or the galaxy will break apart. What is responsible for holding the stars, gas, and dust together in a galaxy?
a) heat
b) light
c) gravity
d) friction

Galaxies are large groups of millions, billions, or even trillions of stars. What keeps the stars in a galaxy from moving away from each other?
a) gravity
b) density
c) composition
d) temperature

The sun is much larger than the moon. However, as viewed from Earth, the sun and moon appear to be the same size. Why do the sun and moon appear to be the same size when viewed from Earth?
a) The moon is much hotter than the sun.
b) The moon is much denser than the sun.
c) The moon is much brighter than the sun.
d) The moon is much closer to Earth than the sun

One way to compare the objects of space is by their relative sizes. Which of the following is larger than a galaxy?
a) star
b) planet
c) universe
d) solar system

Which of the following correctly lists the objects of space in order from largest to smallest?
a) universe, galaxy, star, planet
b) universe, galaxy, planet, star
c) galaxy, universe, star, planet
d) galaxy, universe, planet, star

One of the objects that astronomers study with telescopes on land and in orbit around Earth are called nebulae. Which statement correctly describes what a nebula is and where in relation to other objects nebulae may be found?
a) A nebula is an exploding star found in a galaxy.
b) A nebula is a type of galaxy found throughout the universe.
c) A nebula is a cloud of gas and dust found in interstellar space.
d) A nebula is a star in the universe that used up all of its nuclear fuel.

A galaxy holds a special place among all the other objects in outer space. Which is the best description of a galaxy according to its relationship to other objects?
a) A galaxy is the universe.
b) A galaxy is a new star that shines very brightly.
c) A galaxy is a place that only existed in space long ago
d) A galaxy is a grouping of millions or billions of stars along with clouds of gas and dust.

Weight and mass are related, but they are not the same thing. If you weigh 115 kilograms on Earth, you would weigh 19 kilograms on the Moon and almost 272 kilograms on Jupiter. Which statement explains why your weight would be different on these bodi
a) Weight and mass determine how much an object weighs and a person has less mass on the moon but more on Jupiter.
b) Weight is the amount of matter an object contains and mass is related to gravity.
c) Gravity is more important than weight in measuring the mass of an object on different planets.
d) Mass is the amount of matter an object contains, but the weight of an object is due to gravitational force acting on that mas

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