Astronomy and Space Science Chapter 3 Lessons 1-3

Question 1

The ____ consists of the sun, eight planets and their moons, and many kinds of smaller objects.

Accepted Answer

solar system

Question 2

A meteoroid that hits Earth's surface is called a(n) ___________.

Accepted Answer

meteorite

Question 3

Earth is thought to be at the center of the solar system in the geocentric model.

Accepted Answer

True

Question 4

In a heliocentric system, Earth revolves around

Accepted Answer

the sun

Question 5

The sun is a solid surface

Accepted Answer

False

Question 6

The heliocentric system gained support when Galileo observed that

Accepted Answer

Venus goes through phases similar to those of Earth's moon.

Question 7

Most ancient astronomers thought that all celestial objects revolved around ___________.

Accepted Answer

the Earth

Question 8

Most comets are found in the asteroid belt.

Accepted Answer

False

Question 9

The sun's surface layer is the photosphere.

Accepted Answer

True

Question 10

The number of sunspots on the sun varies over a period of about 11 years.

Accepted Answer

True

Question 11

What layer are you looking at when you look at an image of the sun?

Accepted Answer

photosphere

Question 12

The sun is made up of

Accepted Answer

3/4 hydrogen & 1/4 helium

Question 13

The solar system formed from

Accepted Answer

a giant cloud of gas and dust

Question 14

Small asteroid-like bodies that became the building blocks for the planets are called

Accepted Answer

planetesimals

Question 15

The sun produces energy by

Accepted Answer

nuclear fusion

Question 16

The solar wind is a stream of electrically charged particles that extend outward from the sun's

Accepted Answer

corona

Question 17

The sun has 3 layers

Accepted Answer

True

Question 18

The fact that each planet's orbit is an ellipse was discovered by

Accepted Answer

Kepler

Question 19

The layers of the sun are

Accepted Answer

Core, radiation zone, convection zone

Questions 19