Study Guide for Unit 7

Front

Why do the sun and the moon appear to be the same size despite their different radii?

Back

It's due to the relative distances and sizes of the sun and moon.

Front

Do we study space, other planets, stars and galaxies, by direct observation or remote observation? Why?

Back

We study them through remote observation because they are far away.

Front

How long does it take light from a star to reach Earth if the star is 6 light years away?

Back

6 years

Front

Jenn says there are thousands, maybe even millions of galaxies in the universe. What is her error?

Back

There are billions of galaxies in the universe.

Front

Why do we have no satellites or probes that have reached distant stars? What technology do we use to study distant stars and galaxies?

Back

Due to vast distances and propulsion limits, we study them with telescopes and observational tech

Front

What quality of scientific knowledge is demonstrated by the reclassification of Pluto from a planet to a 'dwarf planet'?

Back

Scientific knowledge is self-correcting.

Front

Why would we use a model to study the following concepts: solar system, rock cycle, plate tectonics, and atomic theory?

Back

Models simplify complex concepts for easier understanding and study.