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s4w6 Review formative -

Last updated 3 months ago
16 questions
1

match vocabulary to definition

Draggable itemCorresponding Item
period
a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant
angular size
finding the angle between the line of site from one side of an object to another
semi-major axis
the distance from the center of an ellipse to furthest point
ellipse
the average distance from the earth to the sun
astronomical unit
the time interval of a repeating cycle
1

Which of the following is newtons first law of motion

1

Match the vocab to the definitions

Draggable itemCorresponding Item
geocentrism
slow rotation of the axis of a planet around another axis
parallax
how the position of an object changes with respect to its background when seen from different positions
retrograde motion
the idea that the earth is the center of the solar system
precession
how planets seem to move backwards in their orbits
epicycle
a small circular orbit whose center moves around a larger circular orbit
1

Match the term: rotatation of an object with its orbit.

Draggable itemCorresponding Item
Tidal braking
Deformation caused by gravitational forces between celestial bodies
Synchronous rotation
Temporary dimming of one celestial body by another
Tidal bulge
Gradual slowing down of rotation due to tidal forces
Eclipse
Rotates at the same rate as orbit
1

according to Kepler's second law,

1

In visible light, changing the wavelength will change the

1

Waves carry _________ from one place to another

1

Using the doppler shift, we should be able to tell if a star is moving

2

Which of the following travels the fastest?

1

Now that exhibition is over we are going to start putting aspects of light together. so first - some review: below is a list of things we can glean from light from a star. From what you already know, try to match the aspect of a star we can learn

Draggable itemCorresponding Item
spectral analysis of the light
pattern of the light tells us the makeup of the outermost layer of the earth
luminosity of the star
whether the star is moving towards or away from the earth
distance of the star
how much light is observed from earth
doppler shift of the spectral analysis
light output of the star based on light observed from earth and calculated distance to the star
Brightness of the star
parallax, speed of doppler shift,
size of the star
uh... we can't really tell that about an individual star. we have theories about stars in general.
the mass of a star
angular diameter, and then calculate the linear measurement with the distance found with parallel. (there are other methods of making more precise measurement as well)
Age of a star
from measuring the speed of the orbits of the stars planets
Required
1

Match the layer of the sun to an aspect of that layer

Draggable itemCorresponding Item
corona
Energy is released by fusion
Radiative zone
Energy is moved by photons being released, reabsorbed, and released again
photosphere
Energy is carried by moving atoms rather than photons
Core
transition layer where gases move from being transparent to opaque
Convection zone
thin layer with strong red-emission lines that can be seen during an eclipse
Chromosphere
third hottest layer of the sun that has lowest amount of energy because of its low density
Required
1

review question: What is a neutrino

1

What is a binary star system?

1

Quantum tunnelling explains why fusion happens in stars despite the pressure and temperature being less than what is required to overcome the potential barrier between protons. The potential barrier refers to

Required
1
Draggable itemCorresponding Item
Supernova:
A rotating disk of gas, dust, and other matter that forms around massive objects in space due to gravity pulling material toward it
Chandrasekhar limit:
The maximum mass (about 1.4 times the mass of our Sun) that a white dwarf star can have before it collapses under its own gravity
Degeneracy pressure
A quantum mechanical force that prevents certain types of stars from collapsing, created by electrons or neutrons being squeezed too close together
Neutron star:
An extremely dense stellar remnant composed almost entirely of neutrons, formed when a massive star explodes and its core collapses
Pulsar
A powerful explosion that occurs at the end of a massive star's life, briefly outshining entire galaxies and spreading heavy elements into space
Accretion disk:
A rapidly rotating neutron star that emits regular pulses of radiation from its magnetic poles, acting like a cosmic lighthouse
1

I would prefer the session 4 final to be