chapter 22

Question 0

Geocentric

Answer 0

Describes the content of an earth-centered universe

Question 1

Astronomy

Answer 1

The scientific study of the universe;it includes the observation and interpretation of celestial bodies and phenomena

Question 2

Heliocentric

Answer 2

Describes the view that the sun is at the center of the solar system

Question 3

Retrograde motion

Answer 3

The apparent westward motion of the planets with respect to the stars

Question 4

Ellipse

Answer 4

An oval

Question 5

Astronomical unit

Answer 5

Average distance from earth to the sun; 1.5 x 10(8), or 150 million kilometers

Question 6

Rotation

Answer 6

The spinning of a body ,such as earth,about its axis

Question 7

Revolution

Answer 7

The motion of one body about another, as earth about the sun

Question 8

Precession

Answer 8

A slow motion if earths axis that traces out a cone over a period of 26,000 years

Question 9

Perihelion

Answer 9

The point in the orbit of a planet where it is closest to the sun

Question 10

Aphelion

Answer 10

The place in the orbit of a planet where the planet is farthest from the sun

Question 11

Perigee

Answer 11

The point at which the moon is closest to the earth

Question 12

Apogee

Answer 12

The point where the moon is farthest from earth

Question 13

Solar eclipse

Answer 13

An eclipse of the sun; a solar eclipse occurs when the moon moves in a line directly between the earth and the sun ,casting a shadow on earth

Question 14

Lunar eclipse

Answer 14

An eclipse of the moon; a lunar eclipse occurs when the moon passes through earths shadow

Question 15

Crater

Answer 15

The depression at the summit of a volcano or which is produced by a meteorite impact

Question 16

Ray

Answer 16

Any system of bright elongated streaks sometimes associated with a crater on the moon

Question 17

Bs

Answer 17

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Question 18

Mss

Answer 18

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