[Free Registration/Login may be required to access all resource tools.] Describes how characteristics of plants and animals are inherited and how some characteristics can be affected by the environment.

[Free Registration/Login may be required to access all resource tools.] Explains what fossils are, describes how they form, and discusses what scientists can learn from fossils.

[Free Registration/Login may be required to access all resource tools.] Provides the definitions of physical and chemical changes in matter and gives examples. The law of conservation of mass is also described.

[Free Registration/Login may be required to access all resource tools.] Discusses the rate of dissolving and the factors that affect it.

Looks at how people use natural resources and ways to conserve natural resources in this module. Module reviews over conservation, natural resources, and precycling with explanations, graphs, and pictures.

Investigate what constellations are and how to use light-years as a unit of distance in this module. Learn how to measure star distances in creative ways.

Explore the ways to reduce water pollution and strategies for conserving water with this module. The modules reviews over ways water is polluted and how individuals can conserve water.

[Free Registration/Login may be required to access all resource tools.] Looks at ways that humans use water, why some people don't have enough water, and why poor quality water is a problem.

Do you know how gravity affects you? This module defines gravity and explains how gravity affects the motion of objects.

[Free Registration/Login may be required to access all resource tools.] Discusses the motion of the Earth with its day and night cycle, the seasons, the Earth's orbit around the Sun, and its year-long cycle.

[Free Registration/Login may be required to access all resource tools.] Looks at world climate zones and where they are found, types of climates based on the precipitation amounts and vegetation, and what a microclimate is.

[Free Registration/Login may be required to access all resource tools.] Discusses what causes weather, what humidity is and its role in the weather, how clouds are classified, and types of precipitation and how they form.

[Free Registration/Login may be required to access all resource tools.] Discusses solar and lunar eclipses, the phases of the Moon, and why the phases occur.

[Free Registration/Login may be required to access all resource tools.] Discusses what a climate is, how it is related to latitude, how oceans influence climate, and how mountains affect climate.

[Free Registration/Login may be required to access all resource tools.] Discusses how mixtures of solids can be separated based on observable properties of their parts such as particle size, shape, color, and magnetic attraction.

[Free Registration/Login may be required to access all resource tools.] Looks at the properties of magnets and why some materials are magnetic.

[Free Registration/Login may be required to access all resource tools.] Looks at the Earth as a magnet and how Earth's magnetism benefits living things.

[Free Registration/Login may be required to access all resource tools.] Discusses water and where it occurs on Earth, gives an overview of the water cycle, and explains how the ocean is an integral part of the water cycle and is...

This digital textbook covers core physical science concepts and includes interactive features, real world examples, and videos.

This digital textbook covers core physics concepts and includes interactive features, real world examples, videos, and study guides.

This digital textbook covers core chemistry concepts and includes interactive features, real-world examples, and videos.

A complete high school Precalculus Concepts course. Includes 'Related Modalities' for each lesson that teach the same concept in different ways. The text materials follows Algebra II and comes before Calculus or Statistics. The content...

A complete high school Algebra 2 course with interactives in every lesson and videos in some. Adaptive Practice questions ensure the material is understood before moving on to build on it. Every lesson also has specifically chosen...

A complete high school Geometry course that includes interactives in every lesson and videos in some. Adaptive Practice questions ensure the material is understood before moving on to build on it. Every lesson also has specifically...