Notes 1 Exam

Question 0

A cluster of galaxies is about ___ times larger (in spatial extent) than a typical galaxy.

Answer 0

100

Question 1

What are constellations?

Answer 1

Constellations are patterns we perceive of the stars apparent position in the night sky from earth.

Question 2

What is the force of gravity?

Answer 2

F= G M(a) M(b) / r(squared)

Question 3

The moon is growing more full each night, as it’s phase gradually changes. What is the progressive increase in the moon’s visible surface that is reflecting sunlight called?

Answer 3

Waxing

Question 4

What geometric shape did Kepler introduce when modifying Copernicus heliocentric model of the universe?

Answer 4

An ellipse

Question 5

What is an observable consequence of Earth’s 24 hour rotation?

Answer 5

Day and night.

Question 6

Observable consequence of earths annual revolution around the sun?

Answer 6

Seasons

Question 7

Which property of an ellipse determines the size of the ellipse?

Answer 7

The eccentricity of the orbit (e)

Question 8

What did Galileo observe with a telescope for the first time ever?

Answer 8

The moon has earth like geography. Venus has phases. Jupiter has moons. The sun has sunspots and it rotates on it’s own spin axis.

Question 9

T/F

A planet that orbits father from the sun travels slower in its orbit than a planet that orbits closer to the sun

Answer 9

T

Question 10

T/F

A lunar eclipse can occur only during a full phase.

Answer 10

T

Lunar eclipse happens during a full moon and solar eclipse happens during the new moon.

Question 11

Wein’s law states that the wavelength at which most radiation is emitted by an object that produced a blackbody spectrum is inversely related to which property of the object?

Answer 11

Temperature

Question 12

Which forms of radiation do not penetrate the Earths atmosphere?

Answer 12

Ultraviolet, x-ray, and gamma ray

Question 13

What is emitted from an atom when one of its electrons makes a transition from a higher energy state to a lower energy state?

Answer 13

Photons

Question 14

What kind of spectrum does a solid, liquid, or dense gas produce?

Answer 14

Continuous

Question 15

Which of the following is not an electromagnetic wave?

Answer 15

Electromagnetic wave is a wave of energy with a frequency within the electromagnetic spectrum. (Radio,microwave, infrared, visible light, ultraviolet, and gamma ray waves)

Question 16

If a certain star emits most intensely in the visible region of the spectrum, a cooler star could emit mostly in which other parts of the electromagnetic spectrum?

Answer 16

Infrared, microwave, or radio

Question 17

T/F

The emission or absorption line spectrum of an element is unique to that element.

Answer 17

T

Question 18

A spectrum compares which two measurable quantities of an astronomical object?

Answer 18

Intensity of light and frequency

Question 19

T/F
Everyday the moon rises in the easy and sets in the west due to its orbit around earth, but the stars to not rise in the east and set in the west because they do not orbit earth.

Answer 19

T

Question 20

Which kind of light carries the most energy?

Answer 20

Gamma ray

Question 21

Why are bigger telescopes preferable to build?

Answer 21

The bigger the telescope the more light that is collected making for a sharper and more detailed image.

Question 22

Why is it possible to see stars in the night sky if they are so far away?

Answer 22

Because of their luminosity

Question 23

Electromagnetic waves (light) in the radio portion of the spectrum have what wavelengths?

Answer 23

10 to the 3rd

The scale of buildings

Question 24

The moon rises in the easy and sets in the west in the sky due to _____.

Answer 24

Earths rotation

Question 25

Interferometry is the use of multiple telescopes in conjunction with each other to ____.

Answer 25

Get the same results as a telescope the size of the distance between the multiple telescopes

Question 26

The biggest object in our solar system is _____

Answer 26

The sun

Question 27

A solar eclipse occurs when…

Answer 27

The moon blocks the suns light from reaching earth. Happens during a new moon.

Question 28

State one reason why the heliocentric model helps to explain the planetary motion better than the earth-centered one.

Answer 28

It accurately models the retrograde motion of planets

Question 29

How would the seasons of earth change if the planets spin axis was tilted 50 degrees instead of 23.5?

Answer 29

The seasons would be more pronounced, summers would be hotter and winters would be colder.

Question 30

How would the seasons on earth change if the planets spin axis was perpendicular to its orbit? (No tilt)

Answer 30

There would be no seasons

Question 31

What does keplers 2nd law say about planets orbital velocity with respect to the distance?

Answer 31

Planets closer to the sun have a higher velocity.

Question 32

The sun is about ___ times larger than the earth.

Answer 32

100