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Our Solar System 05: The Earth in Space

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Janelle Willis

on 21 July 2018

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Transcript of Our Solar System 05: The Earth in Space

Hello everybody! My name is Janelle and I will be your guide throughout this lesson. Today's lesson will be all about the Earth-Sun-Moon system and the causes of the seasons. You will also learn about how the day and night lengths are different and how the size of the Moon appears on Earth. Please pay attention for there will be an activity for the students at the end to show what they have learned.
Because Earth moves on its orbit, we get winter, spring, summer, and fall.
Causes of the Seasons

The Earth and the Moon are actually not that far apart comparing the distance of Earth to other planets. Average distance between the Earth and the Moon is 30 times Earth's diameter. The moon on apogee is 405,500 km away. The moon on perigee is 363,300 km away. The moon is better on perigee for scientists because the moon can be studied better at that angle. The moon is 11% farther away from Earth than at perigee.
Size of the Moon on Earth
We have day and night because of the Earth rotating on its axis. It takes Earth a whole 24 hours to spin completely. If the Earth didn't tilt, we would have the same season fro the rest of our lives. Because Earth is on a tilt, some places get a lot of sunlight, while other places don't. Days are shorter on the Northern Hemisphere during winter for the lack of sunlight. But, the Northern Hemisphere during the summer receives a lot of sunlight oppose the Southern Hemisphere. Days are long in the Northern Hemisphere.
Day and Night Length
The Earth, Moon, and Sun are very far apart from Each other. But, the Moon is closer to the Earth than the Sun. We use models to help us determine how far apart they all are (models are 3D representations of something that is too small or too big to help study). The Earth revolves around Earth in an elliptical orbit and the Moon revolves around the Earth in a elliptical orbit.
Earth-Moon-Sun System
Now that we have finished learning about our Earth, Sun, and Moon, it is now time to put your knowledge to the test! If needed to go back to previous slides will be necessary for you. Just rmember to do your best and don't stress. Good luck!
Students, please answer the following questions:

What season do you get since the Earth is on a tilt and moves on its orbit?
What is the Summer Solstice?
Do scientists like apogee or perigee better for the Moon and why?
How long does it take for the Earth to spin one full time?
During the winter in the Northern Hemisphere, are the days shorter or longer and why?
What are models and why do scientists use them for space?
For this lesson, I decided to give the students a few questions to answer over what they just went over. Over where and what information was being used, every one should pass this activity.

I chose the students to do this type of activity to see if they paid attention during the entire lesson.

*All answers should be in the lesson
Our Solar System 05: The Earth in Space
By: Janelle Willis

Winter Solstice: First day of winter for Northern Hemisphere. Sun overhead Tropic of Capricorn.
Summer Solstice: irst day of summer for Northern Hemisphere. Sun overhead Tropic of Cancer.
Autumnal Equinox: First day of fall for Northern Hemisphere. Sun overhead equator.
Vernal Equinox: First day of spring for Northern Hemisphere. Sun overhead equator.
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