8th grade Quarter 2 review

Front

What is the origin of comets?

Back

Comets originate from the Oort cloud or Kuiper belt.

Front

Describe the orbit of a comet.

Back

Comets have a long elliptical orbit.

Front

Which color of light has the lowest frequency?

Back

Red has the lowest frequency.

Front

What type of star cluster is loosely bound and can contain thousands of stars?

Back

An open cluster.

Front

What is a supernova?

Back

A supernova is a gigantic explosion that causes the death of a large star.

Front

Which wave has the greatest frequency in a diagram?

Back

Wave 4 has the greatest frequency.

Front

What is the difference between the Oort cloud and the Kuiper belt?

Back

The Oort cloud is a spherical shell surrounding the solar system, while the Kuiper belt is a disc-shaped region beyond Neptune.

Front

What is the definition of frequency in terms of waves?

Back

Frequency is the number of waves that pass a point in one second.

Front

What is a pulsar?

Back

A pulsar is a highly magnetized rotating neutron star that emits beams of electromagnetic radiation.

Front

What is a black hole?

Back

A black hole is a region of space where the gravitational pull is so strong that nothing, not even light, can escape from it.