Earth Science SOL Unit 2 Test - Astronomy and the Universe

What happens to the largest stars at the end of their lives?

• They become black holes.

• They become supernovae.

• They become white dwarfs.

• They become neutron stars.

Answer explanation

The largest stars end their lives in a dramatic explosion called a supernova. This event occurs when they exhaust their nuclear fuel, leading to a collapse and subsequent explosion, often resulting in a neutron star or black hole.

Which THREE of the following are correct about Mars?

• Red planet

• Two moons

• Highest Mountain

• Just before Earth

Answer explanation

Mars is known as the 'Red Planet' due to its iron oxide surface. It has two moons, Phobos and Deimos, and features Olympus Mons, the highest mountain in the solar system. It is not just before Earth in the solar system.

Which planet is the seventh from the Sun and is known as the Icy Planet?

• Neptune

• Uranus

• Saturn

• Jupiter

Answer explanation

Uranus is the seventh planet from the Sun and is often referred to as the Icy Planet due to its cold atmosphere and composition, which includes water, ammonia, and methane ice. This distinguishes it from the gas giants.

Tags

NGSS.HS-ESS1-4

What causes meteor showers?

• Collisions with planets

• Earth passing through trails of debris

• Solar flares

• Comet explosions

Answer explanation

Meteor showers occur when Earth passes through trails of debris left by comets or asteroids. As these tiny particles enter the atmosphere, they burn up, creating bright streaks of light in the sky.

What are meteorites?

• Comets that have melted

• Meteoroids that survive passage through the atmosphere

• Stars that have exploded

• Asteroids that have broken apart

Answer explanation

Meteorites are specifically meteoroids that have survived their journey through the Earth's atmosphere and landed on the surface. This distinguishes them from other celestial objects like comets or asteroids.

Match the following celestial objects with their primary compositions.

• Stars

• Ice, dust, and rock

• Asteroids

• Metal and rock

• Comets

• Gas and plasma

Answer explanation

Refer to your notes.

What is the main feature of a comet's orbit?

• Circular and close to the Sun

• Elliptical and far from the Sun

• Triangular and near Earth

• Rectangular and near Mars

Answer explanation

The main feature of a comet's orbit is that it is elliptical, allowing them to travel far from the Sun before returning. This distinguishes them from other celestial bodies with more circular orbits.

Tags

NGSS.HS-ESS1-4

What is the Crab Nebula an example of?

• A black hole

• A stellar nursery

• A red giant

• A white dwarf

Answer explanation

The Crab Nebula is a remnant of a supernova explosion and is known for being a stellar nursery, where new stars are formed from the gas and dust. It is not a black hole, red giant, or white dwarf.

Tags

NGSS.HS-ESS1-3

Stellar evolution is the process of a star (a)   over time.

• changing

• forming planets

• collapsing a black hole

• creating galaxies

Answer explanation

Stellar evolution refers to the process of a star changing over time, including its formation, life cycle, and eventual death. The correct choice 'changing' accurately captures this ongoing transformation.

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

What is a black hole?

• A type of galaxy

• A massive, compact astronomical object

• A young star

• A planetary nebula

Answer explanation

A black hole is defined as a massive, compact astronomical object with a gravitational pull so strong that nothing, not even light, can escape from it. This distinguishes it from galaxies, stars, and nebulae.