Earth & The Sun
What is an axis?
An invisible line that runs North to South through the center of a planet
What causes Earth to experience seasons?
The curve of earth, the revolution around the sun, and the tilt of Earth's axis
umbra
What are tides?
Daily changes in the levels of ocean water
What is electromagnetic radiation?
energy traveling through electromagnetic waves
What is the tilt of Earth's axis?
23 degrees
How many hours of daylight does the Southern Hemisphere experience during an equinox?
12 hours
When does a solar eclipse occur?
When the moon comes in between Earth and the sun.
What causes tides?
The gravitational pull of the moon and sun
What types of electromagnetic radiation can be harmful in large amounts?
ultraviolet radiation and x rays
How many hours of sunlight does the equator receive?
12
When are the two solstices? (months)
June and December
When does a lunar eclipse occur?
When the Earth comes between the moon and the sun.
How many tides do most places have a day?
4 (2 high and 2 low)
What is the wavelength?
Distance between crests or troughs on adjacent waves
What is a revolution?
The length of a day
During what months would the South Pole experience the Midnight Sun?
October - January
Why is it rare to see a full solar eclipse, even though they occur about once a year?
Because the shadow cast on the Earth is so small, only a few people see it each time.
What are neap tides?
Tides with the smallest daily tidal range
What is frequency?
The amount of waves that pass by a fixed point per second
What is a revolution?
Length of a year
How does the curve of Earth affect how sunlight hits it? How does that affect temperature?
Because Earth is curved, the parts that stick out more (the equator) receive more direct sunlight. Also, the sunlight has to travel more distance to reach the poles, which makes it weaker. This causes the poles to be cooler than the equator.
What are all the phases of the moon in order starting with the new moon?
new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, waning crescent, new moon
What are spring tides?
Tides with the largest daily tidal range
If a wave has high frequency, is the energy high or low?
high