E&S 1st 9 week Exam

This diagram shows the ___ system, first thought of by Copernicus & later supported by Kepler & Galileo.

• Heliocentric

• Ptolemaic

• Geocentric

• Polycentric

Because the earth revolves around the sun on a tilted axis...

• we have seasons
• we see different constellations in the sky different times of year
• the vertical ray of the sun travels from 23.5N to 23.5S
• All of the above

Kepler determined that the shape of a planets orbit around the sun is

• a circle

• an ellipse

• a oblate spheroid

The Earth's axis is tilted _____ degrees.

• 23.5

• 52

• 10

• 40

What takes a year?

• rotation
• revolution

This model best illustrates which of the following laws?

• Kepler's 2nd Law of Motion
• Newton's 1st Law of Motion
• Kepler's 3rd Law of Motion
• Newton's Law of Universal Gravitation

During an ________, the length of nighttime and daytime are about the same because neither hemisphere is tilted toward the sun.

• equinox
• solstice
• earthquake
• solar eclipse

Which law explains why the blue planet takes longer to move around the sun than the red planet?

• Kepler's 2nd Law of Motion
• Newton's 2nd Law of Motion
• Kepler's 3rd Law of Motion
• Newtons Law of Universal Gravitation

Which planet would have the greatest velocity?

• Mercury
• Mars
• Jupiter
• Neptune

Which of Kepler's Laws states that when a planet is farther away from the sun it travels at a slower rate of speed than when it is closer to the sun?

• 1st
• 2nd
• 3rd
• None