What galaxy is Earth and our solar system located in?
Milky Way Galaxy
How long does it take the Earth to rotate?
24 hours, 1 day.
Which layer of the sun does Nuclear fusion occur?
If we have lower levels of solar radiation reaching the earth's surface than what also decreases?
Describe Kepler's 1st Law.
All planets orbit the sun in elliptical orbits with the sun at one focus.
Tilt of the earth and revolution around the sun.
The sun is made up of mostly what two elements?
Hydrogen and Helium.
Nuclear energy - radiant energy - chemical energy
Describe Kepler's 2nd Law.
If time intervals are equal then areas are equal.
Explain the shape of the Earth.
It is larger at the equator and flatter at the poles because of rotation.
Describe Nuclear Fusion.
4 Hydrogen atoms combine to form 1 Helium atom releasing energy.
How does sunlight change from summer to winter?
It is less intense in the winter than the summer because we are getting less DIRECT solar radiation.
Approximately how many stars are in the Milky Way Galaxy?
100 billion.
What two events can occur when the sun, moon and earth are in a straight line?
Eclipses and Spring Tides (higher than normal height difference between high and low tides.)
True of False.
Nuclear Fusion occurs in other stars in the Milky Way Galaxy making it visible to us here on Earth.
True.
If a planet has less of a tilt than Earth how will its seasons differ?
It will have less seasonal differences.
When the Earth is at perihelion in its orbit it is traveling _______________________.
Faster.
Seasonal changes in constellations are caused by?
Earth revolving around the sun.
What is one fact known about all galaxies?
They are composed of many stars.
If a planet has a greater tilt than Earth how will its seasons differ?
They will be more extreme.
What phase of the Moon does a Solar eclipse occur?
New Moon.
How does latitude affect climate.
Determines the amount of direct solar radiation an area recieves.
How does energy flow from space (the Sun) to Earth?
Radiates.
The interaction of charged particles from the Sun with Earth's magnetosphere causes?
Auroras (Northern Lights)
Tides are mainly caused by?
The gravitational pull of the moon.
What season is it in the Southern Hemisphere?
Summer.
What is the difference between nuclear fusion vs. fission.
Fusion = fusing together (occurs in the sun's core)
Fission = splitting atoms (occurs in earth's core)
Photosynthesis changes solar energy into usable chemical energy.