What is a Year?
In science, a year is the time it takes for a planet to complete one orbit around its star. On Earth, a year is approximately 365.25 days long. This is the time it takes for the Earth to complete one full orbit around the Sun.
Study Guide:
- Definition: Define a year as the time it takes for a planet to complete one orbit around its star.
- Earth's Year: Explain that on Earth, a year is approximately 365.25 days long due to its orbit around the Sun.
- Seasons: Describe how the Earth's orbit and tilt cause the changing of seasons.
- Leap Year: Discuss the concept of a leap year and why it is necessary to account for the extra 0.25 days in Earth's orbit.
- Other Planets: Explore how the length of a year varies on other planets in our solar system.
◂Science Worksheets and Study Guides Third Grade. Science Worksheets: Water.
Study Guide
Water 
Worksheet/Answer key
Water Worksheet/Answer key
Water Worksheet/Answer key
Water Vocabulary/Answer key
Water
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Concepts of Earth Science (SD1, SD2, SD3, SD4)
The student demonstrates an understanding of geochemical cycles by describing the water cycle to show that water circulates through the crust, oceans, and atmosphere of Earth.
Concepts of Life Science: A student should understand and be able to apply the concepts, models, theories, facts, evidence, systems, and processes of life science. A student who meets the content standard should:
Develop an understanding that all organisms are linked to each other and their physical environments through the transfer and transformation of matter and energy.
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 Earth's geochemical cycles.