Exam 1: Here and Now

Our Solar System resides in the _______________ Galaxy.

Approximately how long does it take light to reach the Earth from the Sun?

The Universe consists of the Sun, its family of planets, and some smaller bodies such as moons, asteroids, and comets.

Scientists try to form hypotheses that explain how nature works.

Which of these planets is approximately the same size as Earth?

The _______________contains all of the galaxies, solar systems, stars, and planets.

When did life first appear on Earth?

What is the scientific method?

A convenient method to write very large numbers is to use scientific notation.

As Earth _______________ on its axis, it produces the cycle of day and night.

Astronomers refer to the beginning of the Universe as the _______________.

The size of a star's image in a photo tells you how _______________ the star appears.

Earth is approximately 13,000 km in diameter.

Why are extrasolar planets difficult to detect?

The discovery that whether peas are smooth or wrinkled is an inherited trait was made by _________.

The scientific method is a simple, mechanical way of grinding facts into understanding.

The most widely accepted system of measurement is the metric system.

What is the Sun made up of?

Which list is in order of increasing size?

Figure 1 In Figure 1, what is the pointer indicating?