Earth Science- Unit 1 Edpuzzle Questions
When was the Big Bang?
10-15 bya
The light we see from the Andromeda Galaxy (2.5 mil yrs away)...
2.5 mil yrs old
Approximately, how much of our Sun is made up of helium?
25%
How old is the Sun?
4.5 billion years old
How many proposals does the team receive every year from scientists wanting to use the Hubble Space Telescope?
thousands
(T/F) All of the terrestrial planets are solid
true
What is a light year?
Distance light travels in one year
So what is the factor that determines whether a star becomes a white dwarf, neutron star, or a black hole at the end of its life?
Mass
Where do stars from?
Nebulae
Which of the Jovian planets rotates on its side?
Neptune
Is our Sun in the middle of the Milky way?
No
Are galaxies moving away from each other?
No technically the space in between the galaxies is moving (galaxies are not moving themselves)
Stars begin as...
Protostars-from the collapse of dust and gas
So is the temp. of the universe increasing or decreasing as it expands?
decreasing
What did Edwin Hubble discover?
an expanding universe (galaxies moving apart)
Since the Big Bang, the universe has been______1_____ and becoming ______2_______dense.
cooling, less
What is a white dwarf?
core of the dead star
The BB Theory is most directly supported by observations of redshift and...
cosmic microwave background radiation
(T/F) All of the Jovian planets are made of ice
false
What was the major change in the matter of the universe that allowed "visible light" to pass through?
formation of stars
Why does it fold into itself?
gravity
What do hydrogen atoms fuse into in a star?
helium
If everything in the universe were squeezed together into one thing like the "primeval atom or cosmic egg"it would be very.....
hot
Was the original universe hot or cold?
hot
What are stars mostly made of?
hydrogen
What is the prominent gas of the huge clouds of dust and gas where its own gravity causes it to collapse?
hydrogen
The BB model predicts a 3:1 ratio of what 2 elements in the universe at large?
hydrogen:helium
In the beginning, how did scientists view the universe?
infinite and ageless
Towards the end of the Sun's life, which planets will it incinerate (swallow up)?
inner planets
What determines the destiny of a star?
its mass
At what stage of a star's life do element's form?
late stage
The visbile light emitted shortly after the BB would be greatly red shifted by now and would be what kind of waves?
microwaves
As the universe cooled....
microwaves turned into radio waves
Vesto Slipher found that the astronomical objects he studied were "red shifted" meaning they were_________
moving away from us
Do we know what started the Big Bang?
no
Is our Sun a High or Low mass star?
low
Which sized stars are able to form heavier and heavier elements in their core at the end of its life?
only large star
All of the 8 planets _______around the Sun
revolve
What was expanding at a fast rate?
space
Stars are classified according to....
surface temp and luminosity
Which of the terrestrial planets has the hottest surface temp?
Venus
Which of the terrestrial planets is the hottest?
Venus
Is this 3:1 ratio found in the universe?
Yes
(T/F) The Oort Cloud is where the gravitational pull of the Sun ends
True
Which sized stars supernova?
Large stars
Is our sun a metal-rich star?
yes
What is the age of the universe?
13-15 billion years old
According to our best estimate, how old is the universe?
14 billion years old
How much larger would our Sun have to be for it to become a black hole at the end of its life?
3x larger
How many new stars form in the Milky Way every year?
5
How many planets are in our Solar System?
8
The Hubble Space Telescope orbits the planet every..
95 min
The Big Bang Theory describes the formation of the universe and how its size changed. Why does cosmic microwave background radiation support this theory?
As the universe has cooled and expanded over time, the initial heat and light waves from the BB stretched out to a longer wavelength.
What are nebulae?
Clouds of dust and mostly hydrogen gas
Scientists found these waves by mistake. They exist in every part of the sky. We call this...
Cosmic microwave bg radiation
What are two ways that the telescope captures images that are invisible to human eyes?
Infrared and UV
So, what happens initially when the stars run out of hydrogen gas?
It collapses
The farther away something is...
The farther in the past we see it
Hubble and Humason found that the further away the galaxy was, the faster it was moving away from us (True or False)
True