Cosmology

Question 0

He observed that light from distant galaxies is red shifted.

Answer 0

Edwin Hubble

Question 1

It is the study of origin and history of the universe.

Answer 1

Cosmology

Question 2

What does it mean when light from distant galaxies is red shifted?

Answer 2

It means that galaxies are moving farther and farther away.

Question 3

The farther away a galaxy is from us, the faster it is receding. What law is this?

Answer 3

Hubble’s Law

Question 4

The Hubble’s law is an evidence of this.

Answer 4

Expanding Universe

Question 5

True or False.

The fact that we see all other galaxies moving away from us implies that we are the center of the universe.

Answer 5

False

Question 6

True or False.

All galaxies will see all other stars moving away from them in an expanding universe.

Answer 6

True

Question 7

What concept was used to explain the origin of the universe?

Answer 7

Big Bang

Question 8

What are the 3 major pieces of experimental evidence?

Answer 8

Expansion of the universe, 3K background radiation, hydrogen-helium abundance

Question 9

What does “K” stand for in 3K background radiation?

Answer 9

Kelvin

Question 10

A uniform background radiation in the microwave region of the spectrum is observed in all directions in the sky.

Answer 10

3K background radiation

Question 11

Account for nearly all the nuclear matter in today’s universe. This is consistent with the standard or “big bang” model.

Answer 11

Hydrogen-Helium abundance

Question 12

The process of forming the hydrogen and helium and other trace constituents.

Answer 12

Big Bang Nucleosynthesis

Question 13

Going Farther = redder
Going Towards = blue

What do you call this effect?

Answer 13

Doppler effect

Question 14

It can see this ancient light from the very beginning of the Universe.

Answer 14

Microwave Telescope

Question 15

This theory includes a black hole that exploded.

Answer 15

Physicist Nikodem Poplawski’s theory

Question 16

True or false.

The more masive the star, the shorter the life span.

Answer 16

True

Question 17

In what classification does the biggest star called?

Answer 17

Supergiants

Question 18

In what class is the hottest star?

Answer 18

Class O

Question 19

What color is the hottest star?

Answer 19

Blue

Question 20

This diagram shows the temperature and size of stars.

Answer 20

Hertzsprung-Russel Diagram

Question 21

Where do stars’ energy come from?

Answer 21

Nuclear Fusion

Question 22

What kind of vast clouds does stars start?

Answer 22

Cold Molecule Gas

Question 23

They are immense fusion reactors in space.

Answer 23

Stars

Question 24

What are the stars made of?

Answer 24

Hydrogen and Helium

Question 25

Stage wherein it collects hydrogen. It lasts for about 100, 000 years.

Answer 25

Protostar

Question 26

Stage wherein it stops collecting materials but not yet starting nuclear fusion. It tries to reach the critical temperature. This lasts for about 100 million stars.

Answer 26

T Tauri Star

Question 27

Stage wherein fusion is already starting. This lasts for about 10-15 billion years.

Answer 27

Main Sequence

Question 28

Once hydrogen resource is depleted, it will become?

Answer 28

Red Giant

Question 29

What will happen when a small star die, what will it become?

Answer 29

White Dwarf

Question 30

What will the large star become when it dies?

Answer 30

Neutron Star or Black Hole

Question 31

The outer layer of a star are lost when the star changes from a red giant to a white dwarf.

Answer 31

Planetary Nebula

Question 32

A very small, hot star, the last stage in the life cycle of a star.

Answer 32

White Dwarf

Question 33

It is the explosive death of a red supergiant star.

Answer 33

Supernova

Question 34

Composed of mainly neutrons after the supernova explodes.

Answer 34

Neutron Star

Question 35

Are believed to form from massive stars at the end of their life times.

Answer 35

Black Hole

Question 36

It is a collection of several stars

Answer 36

Galaxies

Question 37

These galaxies are shaped like a spheroid or elongated sphere and consists of only old stars.

Answer 37

Elliptical Galaxy

Question 38

These galaxies have spiral arms and consists of both new and old stars.

Answer 38

Spiral Galaxy

Question 39

These galaxies have no regular or symmetrical structure.

Answer 39

Irregular Galaxies

Question 40

They have lots of young stars, gas, and dust, but do not have spiral arms.

Answer 40

Irregular I galaxies

Question 41

They look strange. It seems that they are distorted by collisions with other galaxies at some time in their history.

Answer 41

Irregular II galaxies

Question 42

When is Earth Day?

Answer 42

April 22

Question 43

It is like anti-gravity working over large distances.

Answer 43

Dark Energy

Question 44

It is due to the cycle. According to this theory, the universe has a limit.

Answer 44

Big Bounce

Question 45

In this theory the universe will become compac.

Answer 45

Big Crunch

Question 46

In this theory, everything will stop moving when it reaches absolute zero in temperature.

Answer 46

Big Freeze

Question 47

It is a dreadful theory wherein everything will be ripped apart.

Answer 47

Big Rip

Question 48

It is a space telescope that has a mirror and can capture visible light.

Answer 48

Hubble Space Telescope

Question 49

Nebular hypothesis was proposed by whom?

Answer 49

Pierre de Laplace

Question 50

The process wherein planets are formed by collecting grains.

Answer 50

Accretion

Question 51

It is when these grains form into clumps and then collided to form larger bodies.

Answer 51

Planetisimals

Question 52

What are the 4 terrestrial planets?

Answer 52

Mercury, Venus, Earth and Mars

Question 53

What are the 4 gas giants?

Answer 53

Jupiter, Saturn, Uranus and Neptune

Question 54

It is a process wherein planetisimals gather surrounding debris.

Answer 54

Sweeping

Question 55

It creates a natural boundary between the terrestrial and gaseous planets, but it could have been a planet.

Answer 55

Asteroid Belt

Question 56

An area containing rock/ice bodies beyond the orbit of Pluto.

Answer 56

Kuiper Belt

Question 57

A cloud containing "dirty ice" well beyond the orbit of the Kuiper Belt. Comets are from this cloud.

Answer 57

Oort Cloud