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100
What is the definition of solar system?
The sun and all the planets and other objects that circle around it
100
What is the axis?
An imaginary line that runs from one pole, through the center of the Earth, to the other pole.
100
How do most scientists think the Earth was formed?
Gravity drew a huge cloud of gases and dust together to form the planets and the sun.
100
What causes day and night?
The spinning of the Earth on its axis?
100
What is the difference between the Earth's rotation and its revolution?
The Earth rotates on its axis every 24 hours and revolves around the sun every 365 1/4 days.
200
Define orbit
A closed, curved path
200
What is the line of latitude? (Which directions?)
A line that circles a globe, runs from east to west
200
How long ago do scientists think the Earth was formed?
About 4.5 billion years ago.
200
Approx. how high is the highest point in the world? What is it?
20,028, Mount Everest
200
What is a time zone? What are the 4 major time zones in the U.S.?
An area which the same time is used; Pacific, Mountain, Central, Eastern
300
Define equator
An imaginary line that circles the Earth halfway between the North and South poles
300
What is the line of longitude?
A line that circles a globe, runs north to south
300
What are the three layers of the Earth?
core, mantle, crust
300
Why are there 24 time zones in the world?
Because the Earth rotates 15 degrees of longitude in 1 hour.
300
A degree of latitude is about how many miles?
69 miles
400
What is the core?
The layer at the center of the Earth
400
What is the 0-degree line of longitude?
Prime meridian
400
What are the 2 ways the Earth moves in space?
It revolves around the sun and spins on its axis.
400
Why do globes have lines of latitude and longitude?
To help people find different places and features on Earth.
400
If it is 3:00pm in the Eastern time zone, what time is it in the Mountain time zone?
1:00pm
500
What is the mantle?
The middle layer of the Earth
500
How does the Earth move around the sun?
In a closed, curved path called an orbit
500
What are the names of the 7 continents?
Africa, Antarctica, Asia, Australia, Europe, North America, South America
500
What is the Earth sometimes called?
The blue/water planet
500
If you cross time zones traveling east, how does time change?
You gain one hour for each new time zone.
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