Which of the following statements about space science is NOT true?
|A)||Space science is one of the oldest sciences.|
|B)||Space science includes the study of all celestial bodies in the universe.|
|C)||Space science does not have any relationship to other fields of science.|
|D)||The study of space science has led to remarkable achievements during the latter part of the twentieth century.|
|E)||Space scientists hope to gain a better understanding of Earth’s creation.|
Which of the following is the best description of the solar system?
|A)||The Sun is at the center, and the planets and asteroids orbit around it.|
|B)||Earth is at the center, and the Moon, Sun, and other planets orbit around it.|
|C)||The Moon is at the center, and Earth, the Sun, and other planets orbit around Earth.|
|D)||The Sun is at the center of the solar system, and Earth and the other planets are stationary in the sky at a fixed distance from it.|
|E)||The planets are in a group at the center of the solar system, and the Sun orbits the entire group.|
What is a galaxy?
|A)||a group of planets that are in orbit around the Sun|
|B)||a distant star that has planets in orbit around it|
|C)||two stars that are in orbit around one another|
|D)||a large group of stars that are located together in one part of the universe|
|E)||the empty space between large groups of stars|
What is the main force that holds the universe together?
How is a star created?
|A)||The leftovers of an exploding blue star collapse due to gravitational force.|
|B)||A comet melts while approaching another star.|
|C)||Two planets collide and break apart.|
|D)||A planet overheats due to radioactive substances in its core.|
|E)||A cloud of interstellar dust and gas contracts due to gravitational force.|
About how old is the solar system?
|A)||1.5 million years|
|B)||70 million years|
|C)||4.6 billion years|
|D)||15 billion years|
|E)||2 trillion years|
How are chemical elements distributed throughout the solar system?
|A)||Planets close to the Sun tend to be made up of heavier elements, while planets farther away tend to be made up of lighter elements.|
|B)||Large planets tend to be made up of the heaviest elements.|
|C)||Small planets tend to be made up of the lightest elements.|
|D)||Planets closest to the Sun tend to be made up of the lightest elements.|
|E)||Planets with the greatest number of moons tend to be made up of the lightest elements.|
According to scientists, what is most likely to be the ultimate fate of Earth?
|A)||Earth will eventually leave its present orbit around the Sun and move off into space.|
|B)||Earth will be engulfed by an expanding Sun as the Sun goes through its life cycle.|
|C)||Earth will heat up because of radioactive material in its own core and become a star.|
|D)||Earth will slowly move farther away from the Sun until it becomes a frozen planet near the edge of the solar system.|
|E)||Earth will slowly move closer to the Sun until, at last, it moves into the Sun and melts.|
What is the big bang theory?
|A)||a description of the cycles of expansion and contraction of the universe that may occur as the universe goes through its life cycle|
|B)||a description of the formation of planets around stars, which explains how Earth and other planets formed around the Sun|
|C)||a theory about universes that may exist outside of our own|
|D)||a theory about the birth of the universe in which the universe began as a very compact mass of material that exploded and rapidly expanded|
|E)||the belief that each time a star explodes, a big bang is heard throughout the universe|
What is the flat universe model?
|A)||a model in which the universe never changes|
|B)||a model in which gravitational force becomes weaker over time, eventually disappearing as the universe nears the end of its life cycle|
|C)||a model in which most objects in the universe are actually flat in shape and not spherical in shape like Earth, the Moon, and the Sun|
|D)||a model in which the universe is mainly made up of empty space between large groups of stars|
|E)||a model in which the expanding universe will eventually reach a size and then stay at that size, neither expanding nor contracting|