Question

1. all of the following shapes are elliptical. which orbit would have the smallest eccentricity?

a
b
c
d

1. according to keplers laws, an imaginary line from the sun to a planet

a planets move slower when they are closer to the sun and faster when they are farther away.
b covers a smaller areas when the planet is closest to the sun.
c covers a larger areas the greater the planets distance from the sun.
d covers equal areas in equal time periods.

1. according to keplers laws, which of the following statements is true?

a planets move slower when they are closer to the sun and faster when they are farther away.
b planets move faster when they are closer to the sun and slower when they are farther away.
c planets orbit at constant velocity.
d all points on the path of the planets orbit are at equal distances from the sun.

1. kepler stated the relationship between a planets distance from the sun is relative to its

a gravity
b period of revolution
c number of moons
d distance from other planets

1. the earths precession will slowly result in

a seasonal changes during the year
b a change in the viewpoint of our nighttime sky
c longer days in the winter
d a faster rotation on our axis

1. the earths rotation causes

a lower ocean tides
b an equatorial bulge
c our seasons
d infrared heat

1. which color has the longest wavelength?

a blue
b orange
c red
d green

1. evidence that the universe has been expanding since the \big bang\ is best provided by

a a \blue - shift\ in the light spectrum from distant galaxies
b the moons phases
c a
ed - shift\ in the light spectrum from distant galaxies
d the tilt of the earths axis

Explanation:

11.

The circle is a special - case of an ellipse with an eccentricity of 0, which is the smallest possible eccentricity for an elliptical orbit. Among the given shapes, the circle (option B) has the smallest eccentricity.

According to Kepler's second law (the law of equal - areas), an imaginary line from the Sun to a planet covers equal areas in equal time periods.

According to Kepler's laws, planets move faster when they are closer to the Sun and slower when they are farther away.

Answer:

B.

12.