Earth's Motion
Rotation vs. Revolution
Sun
Solar Energy
100
What galaxy is Earth and our solar system located in?
Milky Way Galaxy
100
How long does it take the Earth to rotate?
24 hours, 1 day.
100
Which layer of the sun does Nuclear fusion occur?
The Core.
100
If we have lower levels of solar radiation reaching the earth's surface than what also decreases?
Photosynthesis.
200
Describe Kepler's 1st Law.
All planets orbit the sun in elliptical orbits with the sun at one focus.
200
What two things cause seasons?
Tilt of the earth and revolution around the sun.
200
The sun is made up of mostly what two elements?
Hydrogen and Helium.
200
Explain how solar energy is transformed into chemical energy through photosynthesis.
Nuclear energy - radiant energy - chemical energy
300
Describe Kepler's 2nd Law.
If time intervals are equal then areas are equal.
300
Explain the shape of the Earth.
It is larger at the equator and flatter at the poles because of rotation.
300
Describe Nuclear Fusion.
4 Hydrogen atoms combine to form 1 Helium atom releasing energy.
300
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.
400
Approximately how many stars are in the Milky Way Galaxy?
100 billion.
400
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.)
400
True of False.
Nuclear Fusion occurs in other stars in the Milky Way Galaxy making it visible to us here on Earth.
True.
400
If a planet has less of a tilt than Earth how will its seasons differ?
It will have less seasonal differences.
500
When the Earth is at perihelion in its orbit it is traveling _______________________.
Faster.
500
Seasonal changes in constellations are caused by?
Earth revolving around the sun.
500
What is one fact known about all galaxies?
They are composed of many stars.
500
If a planet has a greater tilt than Earth how will its seasons differ?
They will be more extreme.
600
What phase of the Moon does a Solar eclipse occur?
New Moon.
600
How does latitude affect climate.
Determines the amount of direct solar radiation an area recieves.
600
How does energy flow from space (the Sun) to Earth?
Radiates.
600
The interaction of charged particles from the Sun with Earth's magnetosphere causes?
Auroras (Northern Lights)
700
Tides are mainly caused by?
The gravitational pull of the moon.
700
What season is it in the Southern Hemisphere?
Summer.
700
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)
700
How do WE get energy from the sun?
Photosynthesis changes solar energy into usable chemical energy.