Sun-Earth system
This imaginary line runs through the North and South Poles.
What is Earth's axis?
This is the main cause of Earth's seasons.
What is the tilt of Earth's axis?
During the Big Bang, the universe began to do this very quickly... and is still doing it today.
What is expand
This is the equation used to calculate weight on a planet:
What is 'weight = mass x gravity'
All stars begin their life in this cloud of gas and dust.
What is a nebula?
The Sun appears to rise in the east and set in the west due to this motion.
What is Earth's rotation on its axis?
The longest day of the year in the Northern Hemisphere is called this.
What is the Summer Solstice?
This term describes the stretching of light toward longer, red wavelengths, showing that galaxies are moving away from us.
What is Redshift
This property of an object does not change anywhere in the universe.
What is mass
The Sun is currently in this stage of its life cycle.
What is the main sequence?
Which line of latitude is located in the Northern Hemisphere?
A. Tropic of Capricorn
B. Equator
C. Tropic of Cancer
D. Antarctic Circle
What is C. Tropic of Cancer
The hemispheres experience this season when tilted away from the sun.
What is winter?
This “afterglow” of the Big Bang appears as tiny temperature differences and was mapped by the WMAP satellite.
What is Cosmic Microwave Background Radiation (CMBR)
A planet with a stronger gravitational field will make your weight do this.
What is increase
What gas is produced during nuclear fusion in a star?
What is Helium
At the equator, Earth rotates at approximately this many kilometers per hour.
What is 1,600 km per hour?
These two days of the year have nearly equal amounts of daylight and night.
What are the Vernal (Spring) Equinox and Autumnal (Fall) Equinox?
The warmer and colder spots in the CMBR image represent early differences in this property that later formed galaxies.
What is Density of matter
Why doesn’t Earth fly into space even though it moves quickly around the Sun? Name the 2 crucial forces at play
Gravity pulls it inward while inertia keeps it moving forward.
A dying low- or medium-mass star forms this structure before becoming a white dwarf.
What is a planetary nebula?
We do not feel Earth's spinning motion due to these 3 properties.
1. Inertia
2. Size of Earth
3. Pull of gravity
Which two factors affect how much solar energy a location receives throughout the year?
1. the angle of sunlight (inclination)
2. the concentration/intensity of light (irradiance)
Name the three major pieces of evidence that support the Big Bang Theory.
What are Redshift, CMBR, and elemental abundance
An astronaut has a mass of 60 kg. On Planet X, the gravitational field strength is 7 N/kg.
Using the formula w = m × g, what is the astronaut’s weight on Planet X?
What is 420 N
A high-mass star may collapse into one of these after a supernova.
What is a black hole or neutron star?