Module 2 Lesson 3 Flashcards
how can we describe stars?
characterstics of stars include..
color temperature size brightness composition (the chemical elements in a star)
reminder: a band of colours is called a spectrum. a rainbow is an example. the colours of a rainbow are red, orange, yellow, green, blue indigo and violet
a band of colours is called a spectrum. a rainbow is an example. the colours of a rainbow are red, orange, yellow, green, blue indigo and violet
what do you you use to determine the composition of a star? and what is it? tell me what it can do
we use a spectroscope.
a specctroscope is an instrument used to split light into a pattern of colours so we can see them as seperate lines of colours
each element has its own unique spectrum!
color pattern: red-orange-yellow-green-blue-indigo-violet
the spectroscope can show us how much of each element is present
it can be also used to determine the direction the star is moving
what is the asteroid belt and the kuiper belt?
where are they located?
the kuiper belt is located past neptunes orbit and consist of dwarf planets and comets
the asteroid belt is located between mars and jupiter. it consist of rock and stone
name two ways the sun’s energy interacts with the earth’s atmosphere
the sun’s energy is either absorbed by the earth’s atmosphere
or reflected back into space
is the rotation or the revolution of the earth that causes the seasons.
the revolution causes the season. this is because the earth axis is tilted which causes different surfaces to receive different amounts of heat from the sun. because the earth revolves
around the sun the amount of heat that an area gets changes as the earth revolves
explain why the sun appears to rise in the east and set in the west
The Sun appears to rise in the east and set in the west because the Earth rotates on its axis from west to east.
what causes comets to happen
When a comet’s orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets.
what causes stars to collapse
Gravity. as it constantly works to try and cause the star to collapse.
if a star was 12-15 solar masses it would turn into….
if a star was 25+ solar masses it would turn into…
12-15 solar masses it would turn into a neutron star and if it was 25+ solar masses it would turn into a black hole.
why doesn’t the moon not have a lunar eclipse twice a month?
this is because the moons orbit round the earth is tilted.
the moons orbital tilt changes with the respect of the sun. twice a year this puts the moon in just the right poistion to pass through the earths shadow causing a. lunar eclipse.
look at the diagram for the solar nebula and explain it
there is a huge cloud of dust and gas called the nebula. the cloud starts to collapse in on its self.
the particles near the forming protostar become attracted to it and start spinning around. as the cloud collapsed it spins faster and it started to form the sun the lighter gasses (hydrogen and helium) were pushed away to the outer parts of the solar system. which eventually form the gas giants. the heavier solid matter collided in the inner solar system and formed the terrestrial planets
a
There is a large cloud of dust and gas. Since it is big enough it will start to collapse in on irs self toward the center.
B.
The center of the cloud becomes hotter and denser which causes the particles to fuse and become attracted. Which causes it to start spinning. As it spins it forms a disk called the protoplanetary disk or the proplyd.
C.
99.9% of the materials in the proplyd goes to the sun which leaves 0.1% going to the solar system.
D
In the inner parts of the solar system the gas is pushed away from the sun due to the sun’s intense heat. Which causes the planets jupiter, saturn, uranus and neptune to form in the outer parts.
E
In the inner parts of the solar system are little dust motes that collide and gather together in the force of accretion. The rocks get bigger and bigger forming meteors and asteroids.
F
Finally in each orbit are rocks large enough to clear its orbit of the debris. Those rocks are mercury, venus, earth and mars.
reminder : The apparent change of wavelength due to the position of the source of the wave and the observer of the wave is called the Doppler Effect.
The apparent change of wavelength due to the position of the source of the wave and the observer of the wave is called the Doppler Effect.
what is the Cultural or Religious Significance of Celestial Objects of the Canadian Aboriginal Peoples
the star cluster called the Pleiades orThe Cree referred to it as the “hole in the sky.”
“When they’re referring to a hole in the sky, they’re referring to a spatial anomaly. They’re referring to a wormhole, an alternate reality,”
“They meditated on these things, they dreamed about these things and they debated on these things
