Earth's Motion
Astronomy Basics
Sun
ESRT
Earth's Motion II
100

Name one piece of evidence for Earth's rotation.

Foucault Pendulum 

100
Earth and our solar system are older, younger, or the same age as the Universe
Younger
100

When does the earth experience equal amounts of insolation?

March 21 or Sept 21 or during the Equinox.

100
What is the eccentricity of an ellipse, if the length of the axis is 4 and the distance between the foci is 2?
.500
100
The apparent change in the size of the Sun is evidence for....
Earth's revolution
200
The unit of time called a year is based on what motion?
Earth's revolution
200

What are some characteristics of Stars?

Luminosity, Mass, Size, Temperature.

200

What causes the seasons that we experience in the Northern Hemisphere?

The Tilt of the Earth.

200
The three planets known as gas giants because of their large size and low density are....
Jupiter, Saturn, Uranus or Neptune
200
The unit of time known as a day is based upon what motion?
Earth's rotation
300
The predictable change in the direction of swing of a Foucault pendulum provides evidence that
Earth rotates on its axis
300

Galaxies are currently moving......

Away from each other

300
In NYS, between February and May, the number of daylight hours......
Increases
300

What is the relationship between Luminosity and Temperature of Main Sequence Stars?

As temperature decreases, Luminosity decreases.

300

How many hydrogen nuclei are needed to fuse into one atom of helium?

Four

400

What is the equation for finding the Eccentricity of an Ellipse?

E = Distance between the Foci / Length of the Major Axis

400
If Earth is moving towards a star, the color that star gives off will be.....
Blue
400

The apparent change in the Sun's position throughout a day is best explained by....

Earth's rotation

400

What is the name of the tool used to classify stars?

The H-R Diagram

400
How long does it take the Earth to rotate?
24 hours
500

in the Life Cycle of a Star, in which phase does a star spend 90% of it's life?

The Main Sequence

500
Point in Earth's orbit at which it has its greatest speed, and is closest to the sun is.......
Perihelion
500

What is the color and classification of the star Rigel?

Blue Supergiant

500
Which planet's orbit is most nearly circular shaped?
Venus
500

In which season is Earth closer to the Sun?

Summer

M
e
n
u