Test 2 Cumulative

Front

What is a Nebula?

Back

A Nebula is a giant cloud of dust and gas in space, where stars are born.

Front

What causes high tides and low tides on Earth?

Back

High tides and low tides are caused by the gravitational pull of the moon and the sun on Earth's oceans.

Front

What is a Spiral Galaxy?

Back

A Spiral Galaxy is a type of galaxy characterized by its spiral shape, with arms that wind outward from the center.

Front

How long does it take for the Earth to complete one rotation?

Back

The Earth takes 24 hours to complete one full rotation.

Front

What is the axis of the Earth?

Back

The axis is an imaginary line that runs from the North Pole to the South Pole, around which the Earth rotates.

Front

What is the Main Sequence in the life cycle of a star?

Back

The Main Sequence is a stage in a star's life where it fuses hydrogen into helium, producing energy.

Front

What is the role of gravity in the formation of stars?

Back

Gravity pulls together gas and dust in a nebula to form a protostar, which eventually becomes a star.

Front

What are the phases of the moon?

Back

The phases of the moon are the different appearances of the moon as it orbits Earth, including new moon, crescent, first quarter, gibbous, and full moon.

Front

What is the difference between a galaxy and a solar system?

Back

A galaxy is a massive system of stars, gas, dust, and dark matter, while a solar system consists of a star and the celestial bodies that orbit it.

Front

What is Earth's revolution?

Back

Earth's revolution is the movement of Earth around the sun, which takes approximately 365.25 days to complete.