B2 Review (2024)

Front

What is a white dwarf?

Back

A white dwarf is a small, dense star that is the remnant of a star that has exhausted its nuclear fuel and shed its outer layers. They are not the brightest stars.

Front

What are main sequence stars?

Back

Main sequence stars are stars that are in the stable phase of their life cycle, where they fuse hydrogen into helium in their cores. They cover a range of spectral classes.

Front

What is the relationship between the Southern and Northern Hemispheres during seasonal changes?

Back

When the Southern Hemisphere experiences the first day of fall, the Northern Hemisphere experiences the first day of spring.

Front

How does Arcturus compare to the Sun?

Back

Arcturus is cooler and brighter than the Sun.

Front

What happens at convergent plate boundaries?

Back

At convergent plate boundaries, tectonic plates move toward each other, often leading to geological phenomena such as earthquakes and mountain formation.

Front

What is the tilt of the Earth?

Back

The tilt of the Earth is approximately 23.5 degrees, which affects the seasons and the amount of sunlight received in different hemispheres.

Front

What are supergiants?

Back

Supergiants are among the largest and brightest stars in the universe, but they are not necessarily the hottest.

Front

What is the spectral class of a star?

Back

The spectral class of a star is a classification system that categorizes stars based on their temperature, color, and spectral characteristics.

Front

What is the significance of the equinoxes?

Back

Equinoxes are significant because they mark the points in the year when day and night are approximately equal in length, occurring in spring and fall.

Front

What is the difference between a star's brightness and its temperature?

Back

A star's brightness refers to the amount of light it emits, while its temperature indicates how hot it is, which can affect its color.