Astronomy Unit Test

Evidence that the universe is constantly expanding best supports the

• geocentric model.

• big bang theory.

• quantum theory

• heliocentric model.

Tags

NGSS.HS-ESS1-2

What is the biggest difference between the geocentric and heliocentric models of our solar system?

• In the geocentric model, Earth revolves around all planets in the solar system. In a heliocentric model, the Sun revolves around all planets in the solar system.

• In the geocentric model, the Sun is at the center of our solar system. In a heliocentric model, Earth is at the center of the solar system.

• In the geocentric model, the Sun revolves around all planets in the solar system. In a heliocentric model, Earth revolves around all planets in the solar system

• In the geocentric model, Earth is at the center of our solar system. In a heliocentric model, the Sun is at the center of the solar system.

Which statement best describes the differences between the inner planets and the outer planets?

• The inner planets have thick, poisonous atmospheres, while the outer planets have no atmospheres at all.

• The inner planets are large, gaseous bodies, while the outer planets are small, solid, rocky bodies.

• The inner planets are small, solid, rocky bodies, while the outer planets are large, gaseous bodies.

• The inner planets are collections of frozen gas and rocky particles, while the outer planets are fragments of rock

Why do planets orbit around the Sun in an elliptical pattern?

• gravity is allowing the planets to achieve their escape velocity and orbit the Sun.

• there is a gravitational force between the planets and the Sun, holding the planets in orbit.

• gravity tilts the planets magnetic poles toward the Sun.

• there is gravitational force that pushes the planet's rotation speeds beyond the Sun's rotation speed.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Inertia is defined as the tendency of an object to resist a change in motion. Objects moving in space tend to move in straight lines because of inertia. If this is the case, then why do planets orbit in elliptical paths?

• The speed of the planets and the gravitational pull of the Sun cause the planets' curved paths.

• The magnetic force caused by the lining up of the distant stars pushes the planets into curved paths.

• The force of gravity between planets keeps them on a curved path and prevents them from leaving the solar system.

• The force created by the nuclear fusion of the hydrogen in the Sun causes the planets' curved paths.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which statement correctly compares meteoroids, meteors, and meteorites?

• Meteors float in space, meteoroids move through the atmosphere, and meteorites have landed on the surface.

• Meteors float in space, meteorites move through the atmosphere, and meteoroids have landed on the surface.

• Meteoroids float in space, meteors move through the atmosphere, and meteorites have landed on the surface.

• Meteorites float in space, meteors move through the atmosphere, and meteoroids have landed on the surface.

What is the shape of the Milky Way Galaxy?

• Spiral

• Elliptical

• Irregular

What is the term used to describe the collection of 8 planets and their moons, the sun, asteroids, meteoroids, and comets?

• Milky Way

• Solar System

• Universe

• Local Group

Day and night is caused by the _____________ of earth on its axis.

• revolution
• orbit
• rotation

Tags

NGSS.MS-ESS1-1

The Earth's _______ is an imaginary line that goes from the North Pole to the South Pole.

• longitude

• axis

• latitude

• equator