Third Planet: Earth
The third planet from the sun is Earth. It is the only known planet to support life and has a diverse range of environments, from icy polar regions to hot deserts. Earth is also the densest planet in the solar system and has a powerful magnetic field that protects the atmosphere from solar wind.
Key Facts about Earth
- Orbital Period: 365.25 days
- Equatorial Diameter: 12,742 kilometers
- Atmosphere: Nitrogen (78%), Oxygen (21%), Other gases (1%)
- Number of Moons: 1 (The Moon)
- Surface Temperature: -88 to 58 degrees Celsius
Study Guide
- What is the name of the third planet from the sun?
Earth
- What is the orbital period of Earth?
365.25 days
- What is the composition of Earth's atmosphere?
Nitrogen (78%), Oxygen (21%), Other gases (1%)
- How many moons does Earth have?
1 (The Moon)
- What is the range of surface temperatures on Earth?
-88 to 58 degrees Celsius
◂Science Worksheets and Study Guides Second Grade. The sun and earth
Study Guide
The sun and earth 
Activity Lesson
The Sun & Earth Worksheet/Answer key
The sun and earth Worksheet/Answer key
The sun and earth Worksheet/Answer key
The sun and earth Worksheet/Answer key
The Sun and Earth Vocabulary/Answer key
The sun and earth
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Concepts of Earth Science: A student should understand and be able to apply the concepts, processes, theories, models, evidence, and systems of earth and space sciences. A student who meets the content standard should:
Develop an understanding of the cyclical changes controlled by energy from the sun and by Earth's position and motion in our solar system.