Characteristics of the Universe 8.9 & 6.9

Front

What is the best time to look for shells washed up on the beach?

Back

Around noon.

Front

Which type of star has the greatest luminosity?

Back

Hot main sequence star.

Front

In which position is it winter in North America when Earth is tilted away from the sun?

Back

Position 4.

Front

What is a galaxy?

Back

A system of billions of stars, gas, and dust held together by gravity.

Front

Why does Earth receive more energy from the sun than from all other stars combined?

Back

The sun is much closer than the other stars.

Front

What is the definition of a star?

Back

A ball of plasma that experiences nuclear fusion in its core.

Front

What is the role of gravity in a galaxy?

Back

It holds together billions of stars, gas, and dust.

Front

What is the significance of the sun's distance from Earth?

Back

It allows Earth to receive more energy compared to other stars.

Front

What happens to the seasons on Earth as it orbits the sun?

Back

The tilt of Earth causes different parts to receive varying amounts of sunlight.

Front

What is a supergiant star?

Back

A very large star that is much brighter than a main sequence star.