Solar System
No description yet. This curated deck is ready for daily study.
Card preview (24)
What is the evidence that earth is actually a sphere?
• Objects appearing on horizon 2. Shape of Earth’s shadow on the moon during an eclipse
What was the ancient view of the Earth?
Flat
What is the shape of the earth?
Spherical
Where does the earth bulge?
At the equator
What is the circumference of the earth?
About 40,000 km (24854 miles)
What is the average distance to the sun?
93,000,000 miles (150,000,000 km)
What is the length of a sidereal day?
23 hr 56 min
How does the Earth have a magnetic field?
Due to the convection current in the mantle
How many degrees is the magnetic pole off the rotational axis?
11.5 degrees
How much is the rotational axis tilted from vertical?
23.5 degrees
What causes the seasons?
The tilt of the Earth
How does the tilt of the Earth change?
Due to the revolution around the sun
What is the time of one revolution?
365 days 5 h 49 min
How does the equinox occur?
When the sun is directly over the equator
What is the result of the Equinox?
Day and night are equal
When does the Equinox occur?
First day of spring (March 21 or 22) Fall (Sept 22 or 23)
What is the solstice?
Sun is directly overhead at its furthest point North or south of equator
When does the solstice occur?
First day of summer (June 21 or 22) Winter (Dec 21 or 22)
When is Earth closest to the sun?
Jan 3
When is Earth farthest from the sun?
July 4
How long does one revolution of the moon take?
27.3 days
How long is one rotation of the moon?
27.3 days
What is moonlight?
Reflected sun light
When does the New Moon occur?
Occurs when the moon is between the sun and the Earth