Astronomy

Question 1

Light year definition

Answer 1

The distance light travels in one year

Question 2

Astronomical unit definition

Answer 2

AU=150millionn KM (distance from earth to sun)

Question 3

Ellipse definition

Answer 3

a flatened circle and has been squashed .

Question 4

Star definition

Answer 4

A hot ball of electrically charged gas

Question 5

Planet definition

Answer 5

A celestial body orbiting a star that is massive enough to be rounded by its own gravity

Question 6

Dwarf-planet definition

Answer 6

a object that orbits the sun, but has not cleared its path/ orbit (pluto)

Question 7

Asteroid definition

Answer 7

Asteroids are small, rocky objects that orbit the Sun

Question 8

Nebula definition

Answer 8

an enormous cloud of dust and gas occupying the space between stars

Question 9

Comet definition

Answer 9

large objects made of dust and ice that orbit the Sun.

Question 10

White dwarf

Answer 10

what stars like the Sun become after they have exhausted their nuclear fuel

Question 11

Neutron star definition

Answer 11

exploded star made up most entirely of neutrons

Question 11

Black hole definition

Answer 11

a place in space where gravity pulls so much that even light can not get out.

Question 12

Explain the difference between a day and a year in terms of the earths motion

Answer 12

day= 1 spin (24hr)
year=1 orbit around the sun

Question 12

Why do we say astronomers are able to look back in time?

Answer 12

Because light takes time to travel across space, when we observe distant objects in the universe, were actually seeing them as they were in the past

Question 12

super nova

Answer 12

the colossal explosion of a star. they are the most powerful forces in the universe

Question 13

What are ‘terrestrial planets’

Answer 13

a name given to a planet composed of mainly rock, and iron similar to that of earth

Question 14

List 8 planets in order closest to the sun to farthest from the sun

Answer 14

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

Question 14

What are gas giants?

Answer 14

large planeets composed of gases like hydrogen and helium.
four gas giants: Jupiter, saturn, uranus, neptune

Question 15

what trend is there between the distance from the sun and the speed of a planets orbit?

Answer 15

The further a planet is from the sun, the slower its orbital speed
the closes the planet is from the sun, the faster its orbital speed.

Question 16

Moon phases

Answer 16

(paper)

Question 17

Draw the moon, sun and earth during a lunar eclipse ,label umbra and penumbra.

Answer 17

(paper

Question 18

draw the moon sun and earth during solar eclipse, label umbra and penumber

Answer 18

paper

Question 18

what forces causes a nebula to begin to collapse?

Answer 18

gravity causes it to collapse

Question 19

how do planets form?

Answer 19

The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust called the solar nebula

Question 20

3 pieces of evidence for the SNT

Answer 20

lack of gravity
closer/hostile environment
space radiation

Question 21

Low-mass stars order

Answer 21

Nebula
where fusion begins
the stage the sun is in
red giant
planetary nebula
white dwarf
black holee

Question 22

High mass star order

Answer 22

Gravity causes this to condense into a protostar

protostar
main sequence star
when a star begins to run out of fuel and grows larger

supernova
black hole
neutron starvn