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5th Grade: The Solar System

Chapter 7

Tania Rosales

on 7 February 2013

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Transcript of 5th Grade: The Solar System

Chapter 7 The Solar System What is the Sun? The Sun is an average sized star made mostly of hydrogen and helium.

The star is the central and largest body in our Solar System.

The Sun has almost 99% of the mass in the Solar System.

The Sun gives off large amounts of energy.

The hydrogen particles move very fast and when they hit each other, they can combine to form particles of the element helium. Star A Star is a huge ball of very hot gas that gives off energy. Solar System A system that includes the Sun and its planets, along with many moons, asteroids, and comets. Lesson 1 Photosphere The innermost layer of the sun.

The part of the Sun that gives off the light energy we see. Chromosphere The layer above the photosphere Corona The outermost layer of the sun. Prominences A solar eruption that looks like a ribbon of glowing gases. Solar Flares A solar eruption similar to volcanoes here on Earth.

They cause bright spots on the Sun and give other forms of solar energy. Sunspots Sunspots are dark because they are not as hot as other parts of the Sun. Why is the Sun important in our Solar System?

What would happen if we didn't have a sun?

What are two reasons why we cannot live without the sun? Think-Pair-Share Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Why do planets revolve around the Sun? Lesson 2 The Solar system includes the Sun and its eight planets, dwarf planets, moons, asteroids, and comets.

The planets move around the Sun in elliptical orbits.

An eclipse is a shape of an oval. Planet A planet is a large, round object that moves around a star, such as the sun.

They are much cooler and smaller than stars.

Planets stay in their orbits because of gravity. Gravity is the force of attraction between objects.

The Sun and each of the planets are attracted to each other because of their gravity.

The force of gravity between the Sun and a planet is large enough to move the smaller mass of the planet. Satellite An object that orbits another object in space. Gravity and the Moon Gravity between the Moon and the Earth keeps the Moon in orbit around the Earth.

The Moon moves is always moving in a forward movement and is balanced by the inward pull of the Earth's gravity. Gravity between a planet and its moons keeps the moons in orbit, and gravity between the planet-moon systems and the Sun keeps the system in orbit around the Sun. Free Fall How is the falling cup and water like astronauts orbiting Earth? What are the inner planets? Lesson 3 The four planets closest to the Sun are known as the inner planets. Planet closest to the Sun.

Since it is close to the Sun it has almost no atmosphere. Hot during the day and cold at night. Mercury is covered with thousands of craters.

Craters are made when meteorites crash into a planets surface. Second planet from the Sun.

Very hot and dry.

Has an atmosphere made of thick, swirling clouds. The clouds are burning hot and poisonous.

The clouds reflect the Sun's light, making it one of the brightest objects in Earth's night sky. Third planet from the Sun.

Solar system's largest rocky planet. It is the only planet that has liquid water on its surface.

Most of Earth is covered with water. The layers of gas, or atmosphere that makes life possible on Earth.

It filters out some of the Sun's harmful rays.

Earth is the only planet in the solar system known to support life. The Moon Moons are satelites of planets.

The force of gravity between a planet and its moons keeps the moons in their orbit. Earth has 1 moon.

It has no atmosphere.

Has many craters. Known as the "Red Planet"

The atmosphere on Mars does not have enough oxygen for plants or animals to live. The soil on Mars contains iron oxide, which gives it the brownish-red look Asteroids An Asteriod is a rocky object up to several hundered kilometers wide that revolves around the Sun.

The asteroid belt is between Mars and Jupiter.

Asteroids have hit the Earth.

The smallest asteroids are pebble-sized. Comets Comets A comet is a frozen mass of different kinds of ice and dust that is in orbit around the Sun. The nucleus of a comet is very small.

Scientist describe it as a "dirty snowball." A giant cloud of dust and evaporated gases called the comma surrounds the nucleus.
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