Science: Overview Flashcards
What causes day and night?
The earths rotates around it’s axis every 24 hours, when it is facing the sun it’s day and when it’s facing away from the sun it’s night
What is Daylight Savings time and why was it institued.
Is the practice of moving clocks forward during warmer months so that darkness falls later each day according to the clock . Spring Forward.
Fall back. To save energy and make better use of of daylight
Why does the U.S. have time zones? And how many are there in the US and on earth?
The trains needed a better time plan so they reduced it to 4
24 – 4 in US
Can you describe Earth’s axis of rotation as Earth orbits the Sun?
earth rotates around the axis once every 24 hours
What causes the seasons?
the earth has seasons because it’s axis is tilted, so different parts of the earth gets different amounts of sunlight
How do the areas of sunlight in the two hemispheres change over the year?
They are always opposite.
When the Northern Hemisphere is leaning its most towards the Sun (June 21st), the Northern hemisphere is receiving the most direct sunlight. At that same time, the Southern Hemisphere (which is leaning its most away from the Sun), is receiving the most indirect sunlight it will throughout the year.
As one hemisphere starts getting longer hours of daylight and more direct sunlight, the other hemisphere starts getting shorter hours of daylight and more indirect sunlight.
When, where, and why does direct sunlight hit specific parts of Earth and how does that effect the
seasons?
Direct Light makes it hotter which makes that part of the earth hotter. That is why summer is so hot
What is the relevance of the 5 major lines of latitude?
arctic circle, tropic of cancer, equator, tropic of capricorn, Antarctic Circle Important for times and dates, they also allow you to locate places and
features on the earths surface
How and why do the average temperatures and the seasonal changes at the equator differ from
those at the poles?
Because the sun’s rays hit the earth’s surface at a higher angle at the equater and the sun is always directly overheard at the equator making more direct light which is hotter.
How many orbits does the earth have to go around the sun to get four season’s?
1
What are the five major lines of latitude?
arctic circle, tropic of cancer, equator, tropic of
capricorn, Antarctic Circle
Why the Earth’s equator is not same as Earth’s orbital plane?
Earths rotational axis is not perpendicular to it’s orbital plane. Earth’s equatorial plane is not coplaner with the ecliptic plane.
How far is the earths axis tilted from the orbital plane?
23.5 degrees
North Pole ALWAYS tilts towards what Star?
NOrth Star or Polairs
