Third Planet - Earth

The third planet from the sun in our solar system is Earth. Understanding the characteristics, composition, and behavior of Earth is an essential part of studying astronomy and planetary science.

Characteristics of Earth

Earth is the only known planet to support life. It has a diverse range of environments, including oceans, mountains, deserts, and forests. The planet is also home to a wide variety of living organisms, from microscopic bacteria to large mammals.

Composition

Earth is composed primarily of rock and metal. Its outer layer, known as the crust, is made up of solid rock. Beneath the crust lies the mantle, which is made of solid and molten rock. At the center of the Earth is the core, consisting mostly of iron and nickel.

Atmosphere

Earth's atmosphere is composed mainly of nitrogen and oxygen, along with small amounts of other gases. This mixture of gases supports life and also plays a crucial role in regulating the planet's temperature and climate.

Study Guide

What is the position of Earth in the solar system?
Describe the characteristics of Earth that make it unique among the planets.
Explain the composition of Earth's layers, including the crust, mantle, and core.
Discuss the significance of Earth's atmosphere in supporting life and regulating climate.
Compare and contrast Earth with other planets in the solar system.

◂Physics Worksheets and Study Guides High School. Thermodynamics

The resources above cover the following skills:

PHYSICAL SCIENCE (NGSS)

Matter and Its Interactions

Students who demonstrate understanding can:

Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.

Energy

Students who demonstrate understanding can:

Create a computational model to calculate the change in the energy of one component in a system when the change in energy of the other component(s) and energy flows in and out of the system are known.

Plan and conduct an investigation to provide evidence that the transfer of thermal energy when two components of different temperature are combined within a closed system results in a more uniform energy distribution among the components in the system (second law of thermodynamics).