Earth&Life - Lesson2

Earth & Life - Lesson2

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​Exploring the Solar System

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by Ms. Angelou

​Quick Review

Let us see if you can still remember what we have discussed last week.​

Multiple Choice

What theory is the most common and acceptable in the beginning of the universe?

• Divine Creation Theory

• Big Bang Theory

• Planetesimal Theory

• None of the above

Multiple Choice

Why Big Bang Theory is the most acceptable?

• Because of the Expansion Universe theory

• Because of the Cosmic microwave background radiation tracing

• Because of both expansion universe and CMB radiation explanatiom

• No one actually knows the explanation

Prior Idea

As early as 5th century, philosophers gave us the idea that there is a central fire (sun) and are orbited by densed materials.

Nebular Hypothesis

This theory states that as gas swirled around, group of gasses caused the formation of the sun and planets.

Nebula

It is a cloud of gas and dust found in space. The existing gases in the nebula are hydrogen and helium, while dust particles are mainly composed of carbon and iron.This theory states that as gas swirled around, group of gasses caused the formation of the sun and planets.

Multiple Choice

What's in the solar sytem?

• Sun

• Planets

• Comets, Asteroids & meteoroids

• All the above mention

Multiple Choice

It is the main source of energy on Earth and is the nearest star from us?

• Mars

• Sun

• Venus

• Meteorites

Multiple Choice

Any relatively large natural body that revolves in an orbit around the sun or around some other star and that is not radiating energy.

• meteorite

• asteroids

• comet

• planets

To be a True planet…​

1. The object must be orbiting the sun.

2. It should be nearly spherical.

3. It should be large enough to clear all matter from its orbital zone.​

Open Ended

Why was Pluto classified as a dwarf planet and not one of the “true planets” as it was originally considered?

​Planetary Motion

ROTATION – the spin on it’s axis or the change of daytime to nighttime on Earth

REVOLUTION – the period of completion of a planet’s journey around the sun.

Orbit – definite path where planet can move around.​

Multiple Choice

Named after the Roman God of Merchandise and Merchants.

• Mars

• Mercury

• Venus

• Earth

Multiple Choice

Earth’s Twin, named after the Roman Goddess of Love and Beauty.

• Mars

• Mercury

• Venus

• Earth

Open Ended

The only planet that supports life

Poll

In what classification of planets do Mercury, Venus, Earth, and Mars belong?

• Terrestrial planets

• Jovian Planets

​URANUS

• The seventh planet from the Sun with the third largest diameter in our solar system, Uranus is very cold and windy.

• ​The ice giant is surrounded by 13 faint rings and 27 small moons as it rotates at a nearly 90-degree angle from the plane of its orbit. This unique tilt makes Uranus appear to spin on its side, orbiting the Sun like a rolling ball.

Open Ended

What do the 4 jovian planets have in common?

​Example