earth formation
where are elctrons found
orbiting around the nucleus
What type of charge do protons, neutrons, and electrons have have?
protons - positive neutrons - neutral electrons - negative
What is found in the nucleus of atoms?
protons and neutrons
What is the relationship of the size of the universe to the temperature indicated by the cosmic microwave background radiation?
temperature decreased as size increased
What is a light-year?
the distance light travels in one year
What is the Big Bang Theory? Do we know what started it?
13 - 15 billion year ago the universe developed from a tiny singularity that expanded forming time and space. Space, matter, energy and time emerged from this expansion. It was the expansion of space and time into existence We do not know what started it
What did Edwin Hubble discover?
the universe is expanding - galaxies moving apart
How many proposals do they receive every year from scientists wanting to use the Hubble Space telescope?
thousands
Is matter moving away from other matter?
all atoms of matter are moving away from all atoms of matter. If everything is moving away from everything else, there is no center of the universe. Actually, everywhere is the center of the universe.
Sometime in the past, everything in the universe was
condensed together in a tiny dense...thing
Since the big bang the universe has been ____
cooling and becoming less dense
The Big Bang Theory is most directly supported by observations of redshift and of
cosmic microwave background radiation
Is the temperature of the universe increasing or decreasing as it expands?
decreasing
Hubble and Humason found that the farther away the galaxy was, the ...... it was moving away from us.
faster
What was the major change in the matter of the universe that allowed "visible light" to pass through space?
formation of stars
If everything in the universe were squeezed together into one thing (like a "primeval atom" or "cosmic egg" it would be very _____.
hot
The Big Bang model predicts a 3:1 ratio of what two elements in the universe at large?
hydrogen and helium
What were the first elements?
hydrogen and helium
What makes up stars
hydrogen gas
In the beginning, how did scientists view the universe?
infinite and ageless
Do electrons closer to the nucleus have higher or lower energy than the electrons in the outer shell?
lower
The visible light emitted shortly after the Big Bang would be greatly redshifted by now and would be what kind of waves?
microwaves
Where is the majority of mass in an atom?
nucleus
Do electrons need a certain amount of energy to stay in certain shells?
Yes
The Hubble Telescope orbits the planet every
95 mins
What are atoms? What are they made of?
Atoms are the smallest unit of matter (a substance) that make up everything - made of particles called subatomic particles - protons, neutrons and electrons - tiny particles that cannot been seen with the naked eye
The universe is getting.... over time
Bigger
What are galaxies?
Collections of billions of stars held together due to gravity.
Scientists found these microwaves by mistake. They exist in every part of the sky. We call this:
Cosmic Background Radiation
What forces govern the natural universe?
Electromagnetic Force Gravity Strong Nuclear Force NOT HOPE
What are elements? What are they made of?
Elements are substances that can not be broken down into simpler substances - made of many atoms of that element
There is one detectable center to the universe.(T or F)
False
As the universe cooled...
MICROWAVES (SHORTER WAVELENGTH ENERGY) TURNED INTO RADIO WAVES (LONG WAVELENGTH ENERGY)
Are galaxies moving away from each other?
No, technically space in between the galaxies is moving- the galaxies themselves are not moving
Do protons, neutrons, and electrons have the same mass?
Protons and neutrons do Electrons do not
What is a nebula?
a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter. Stars form in nebulas.
The farther away something is:
The farther in the past we see it
How did wilson and penzias observe energy in the universe?
USED A SATELLITE DISH POINTED AT THE SKY TO OBSERVE ENERGY IN THE UNIVERSE!
2 ways the Hubble Telescope captures images that are invisible to the human eye.
Ultraviolet Light Infrared Light