Physical Science 9.2b - Rotation and Revolution

From the Physical Science class by Derek Owens. The rotation and revolution of the earth, the tilt of the earth, the seasons of the year.

Category:

Education

Tags:

• Physical Science
• rotation
• revolution
• earth
• seasons
• spring
• summer
• winter
• fall
• autumn
• season
• 23 degrees

[guyKLumpur]

Mr Lecturer, I would like to know: is the earth tilted from it's north/south imaginary line towards the right or towards the left? From your drawing it looks like the Earth is tilted towards the left, but on some diagrams they are shown as if the earth is tilted towards the right. Thank you.

[derekowens]

@guyKLumpur Whether the earth is tilted left, right, forward, or back, would depend on what season it is, and from what point of view your diagram is drawn. When it is summer in the northern hemisphere, the north pole of the earth is tilted toward the sun. Hope that helps! DO

[guyKLumpur]

@derekowens thanks for the answer, yeah that i know, when summer the earth is tilted towards the sun, but that does not answer my question. maybe i should ask : what is the actual tilt of the earth from it's imaginary north/south exist, towards the left or right, when you see it far from outer space?

[derekowens]

@guyKLumpur Well, the earth orbits the sun in an ellipse. This ellipse defines a plane, what we call the plane of the earth's orbit. The axis of the earth is not perpendicular to this plane, but is tilted 23 degrees. Whether it is tilted left or right depends on where you imagine looking at it from. If you were looking at it from a position so that it appeared tilted 23 degrees to the right, then if you looked at it from the opposite side it would appear tilted to the left.

[guyKLumpur]

@derekowens Great..now i get what u mean..one more thing that was not explained is that the earth obits around the sun in an ellipse manner, meaning at one moment it's position is a bit higher than the sun and the next moment it's position is lower than the sun. So is it right to say that at the time of both equinoxes, the position of the sun and the earth are at the same level or at a perpendicular position to each other, if u know what I am trying to say? Thank you..

[derekowens]

@guyKLumpur The shape of the orbit is not a perfect circle. It is close to being circular, but it is really an ellipse, so yes, the earth is closer (slightly) to the sun at some times. This has nothing to do with the equinoxes or the seasons, though. The seasons and the equinoxes are a result of the tilt of the axis, not the tiny variation in the distance from the sun.

[prchecker]

very interesting video thanks

[theworldofwonder]

Dear Mr. Owens, i would like to know what kind of electronics you are using in this video? the model and the conmpany? thank you

[docdhaliwal]

@804YankeeFan

dude, when u walk on the fast moving train, does ur speed actually impedes ??????

think about it and u will get ur answer

[804YankeeFan]

Dear Mr. Owens. Could you please explain something to me. Why does the earth's rotation not impede the cars or vehicles movement on the ground?

[hwz77]

derekowens, can u explain something to me? im new at learning geography and i really dont understand something.

it is said that countries near the equator (e.g. Singapore) do not have four seasons, but dry and wet seasons. however, i do not understand that as based on the earth's rotation, a dot on the equation should also experience concentrated light+heat and dispersed light+heat since it is not something at the poles.

[kevinsantoso1]

hei man, i need your help what software do you use, i need it for work

[HammadTunio]

great dude you ARe Awesome..

[sm88hunk]

brilliant work done .. thanks :)