chapter 2

Question 1

what is the universe

Answer 1

extremely hot and dense

Question 2

what already existed tin the universe before the Big Bang

Answer 2

energy

Question 3

when did the big bang explosion happen

Answer 3

14 billion years ago

Question 4

what does the big bag involve all of

Answer 4

space

Question 5

as matter moves away it does what

Answer 5

begins to cool to form matter

Question 6

what formed first electron and quarks or protons and neutrons

Answer 6

electrons and quarks

Question 7

two pieces of evidence that the Big Bang really happened

Answer 7

redshift of galaxies and cps,oc ,ocrpwave background radiation

Question 8

cosmic microwave background radiation

Answer 8

faint radio signals ( left over from the Big Bang) coming from all directions of the universe

Question 9

what formed 3 mins after the big bang

Answer 9

neutrons and protons combine to make atomic nuclei

Question 10

380,000 years latter what formed

Answer 10

electrons and atomic nuclei combine to form an atom

Question 11

how old is the universe

Answer 11

13.8 billion years

Question 12

what is the universe doing

Answer 12

expanding

Question 13

what does Hubbles law State

Answer 13

that galaxies are moving away from us at the speed that is proportional to their distance

Question 14

when a galaxy is farther away from us is it moving faster or slower

Answer 14

faster because it is farther away

Question 15

CMBR

Answer 15

leftover radiation from the Big Bang theory

Question 16

what is the innermost layer of the sun is what

Answer 16

the core

Question 17

in the core what happens

Answer 17

hydrogen fuses helium and form gamma rays and neutrinos

Question 18

solar envelope

Answer 18

cooler than the core

Question 19

sunspots

Answer 19

dark spots on the photosphere typically the same diameter as the earth

Question 20

corona

Answer 20

the outermost layer of the sun

Question 21

when is the corona only visible

Answer 21

during eclipses

Question 22

solar flares

Answer 22

sparks of energy that that can reach the size of the earth

Question 23

what is a nebula

Answer 23

made up of dust and gas and a hydrogen and helium

Question 24

1st step in how our solar system formed

Answer 24

Nebula came over in a spiral over the milky way galaxy… because of gravity it contracted and collapsed on itself

Question 25

2nd step

Answer 25

density and pressure increased and the atoms separated and jostled each other creating heat

Question 26

3rd step

Answer 26

they became so hot that the atoms began to fuse creating nuclear FUSION

Question 27

4th step

Answer 27

through condemnation and accretion the atoms and molecules began to stick together and formed larger particles

Question 28

5th step

Answer 28

then by gentile collision some grains built up into balls and then into objects in a mile in diameter called planetismals

Question 29

q3