Physical Science chapter 14 and 15

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Microwave radiation from space, measurements of the expansion of the universe, the age of the oldest stars in the Milky Way galaxy, and ratios of radioactive decay products all indicate that the universe is about how old?

13.7 billion years

How many moons orbit Mars?

2

The mass of the sun is how much larger than all of the other planets, moons, asteroids, and other bodies in the solar system?

700 times larger

What separates the terrestrial planets from the giant planets?

Asteroid belt

A referent system that can be used to locate objects in the sky is the...

Celestial sphere

The belt of asteroids between Mars and Jupiter is probably...

Clumps of matter that condensed from the accretion disk but never got together as a planet

In which part of a newborn star does the nuclear fusion take place?

Core

Venus "shines" because it is...

Covered with clouds that reflect sunlight

Outer space is mostly...

Empty space

The basic unit of a universe is a...

Galaxy

A galaxy is held together by...

Gravitational attraction

The temperature-luminosity graph used to classify stars was developed by...

Hertzsprung and Russell

Planets in our solar system are classified according to all of the following characteristics except...

Inhabitants

What is the largest planet in our solar system?

Jupiter

Meteorites are classified into all of the following groups except...

Lead

Short-period comets have orbital periods of...

Less than 200 years

Distance in outer space is measured in terms of...

Light years

Where does our sun belong based on the Hertzsprung-Russel classification of stars?

Main sequence

The day on which planet is about the same time period as a day on Earth?

Mars

The lifetime of a star depends on its...

Mass

The planet that has the shortest "year" among the eight planets is...

Mercury

The planets that are not giants are...

Mercury, Venus, Earth, Mars

A shooting star is a...

Meteor

A small body from space that falls on the surface of the Earth is a...

Meteoroid

Remnants of comets and asteroids found in space are called...

Meteoroids

The name of our galaxy is the...

Milky Way (spiral shape with black hole)

What is the outermost planet?

Neptune

Area of the solar system where long-period comets originate is the...

Oort cloud

The planet with the lowest average density, which is less than that of liquid water, is...

Saturn

What type of planets are Mercury, Venus, Earth, and Mars?

Terrestrial planets

Which of the following stars would have the longer life spans?

The less massive

A day on which planet is longer than a year on that planet?

Venus

What planet is called the morning star and the evening star, depending on its position with respect to the sun?

Venus

Our sun is...

an average star, considering mass and age


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