Astronomy

Question 1

the sun

Answer 1

a star of average size and average brightness

Question 2

star

Answer 2

ball of gas that is compressed by gravity

stars are luminous

Question 3

brightness

Answer 3

total amount of viable light emitted by a luminous object per unit of time

Question 4

luminosity

Answer 4

the total of all radiation emitted per unit of time

Question 5

celestial object

Answer 5

a object that is in space

Question 6

planet

Answer 6

celestial object that travel around a star
held in orbits due to the gravitational pull of the sun
8 planets in our universe

Question 7

terrestrial planet

Answer 7

first 4 planet out from the sun,

they are rocky and have small atmospheres

Question 8

gas giants

Answer 8

outer 4 planets that are mostly gas with small rocky cores

Question 9

asteroid belt

Answer 9

band of debris that separates the inner planets from the outer planets. maybe a failed planet

Question 10

suns positive effects

Answer 10

Gravity (holds planets in orbit)
Axis (seasons, angle pf earth how much heat we get=seasons)
Warmth
Current (energy from sun drives wind and currents)
Energy (solar, photosynthesis)

Question 11

albedo

Answer 11

earth’s reflectivity
lighter sunstances refelx heat= glaciers= high albedo
darker colours== rocks= low albedo

Question 12

sun heating the earth

Answer 12

solar radiation goes to the earth
and 20% is absorbed by atmosphere
30% is reflected by the atmosphere
50% is absorbed by land and lakes

Question 13

solar radiation trapped

Answer 13

when the earth is heated it releases solar radiation that could get trapped in the atmosphere

Question 14

order of planets

Answer 14

Mercury, Venus, Earth, Mars , Jupiter, Saturn, Uranus, Neptune

Question 15

how are seasons created

Answer 15

the earths tilt creates seasons

as earth revolves around the sun it’s tilt creates seasons

Question 16

tides

Answer 16

caused by the pull of the moons gravity on earths high tide
side facing moon and side facing away from the moon
switches even 12 hours

Question 17

parts of the sun

Answer 17

6 layers

core, radiation zone, convection zone, photosphere, chromosphere, corona

Question 18

core of the sun

Answer 18

energy generated by nuclear reactions for the sun in the core- always growing
hottest part of the sun- -15 million degrees C
big- extends 1/4 from the center of the sun

Question 19

Radiation zone

Answer 19

interior layer of the sun
energy travels outwards by radiation
takes the energy 1 million years to reach the next layer

Question 20

convection zone

Answer 20

layer in a star where convection currents bring energy upwards

Question 21

corona

Answer 21

outermost layer of the solar atmosphere
has a highly rarefied gas with a temp over 1 million degrees
viable during a solar eclipse

Question 22

solar flare

Answer 22

gases and charged particles that shoot from a active sun spot

Question 23

solar prominence

Answer 23

a structure in the corona consisting of cool gases supported by magnetic fields

Question 24

sun spot

Answer 24

a cool temporary disturbed area in the solar photosphere that appears dark

Question 25

aurora borialis

Answer 25

earth is surrounded by a magnetic field that is strongest near the poles
so when solar winds come in contact with these string fields they come in contact with the gas producing lights at night
southern hemisphere is called in aurora Australis

Question 26

light year

Answer 26

a unit of measurement in space equal to how far light travels in a year

Question 27

how sun in a communication hazard

Answer 27

solar activity on the surface effects satellites

particles ejected by the sun can effect computer info on satellites

Question 28

how sun is a radiation hazard

Answer 28

during a solar storm people travelling in planes can get high radiation because of the high attitude
also radiation storms are harmful to astronauts because they aren’t protected by earths atmosphere

Question 29

satellite

Answer 29

a celestrial object that orbits around another celestial object

Question 30

directions in the sky

Answer 30

stars and invisible lines can help people find their way

Question 31

azimuth

Answer 31

left- right in the night sky, old system used from the observer

Question 32

altitude

Answer 32

up an down in the night sky used my the old system

Question 33

right accession

Answer 33

left to right new system

Question 34

declination

Answer 34

up and down new sytem in the sky

Question 35

Zenith

Answer 35

90 degrees in the sky= right above you

Question 36

Nadir

Answer 36

270 degrees in sky= right below you