Human Organ System

• Organ systems are components of a larger system (the body) and, as such, work together and affect one another.

• Systems in the human body work together to meet our basic needs.

• Choices we make affect our organ systems and, in turn, our overall health.

Forces Acting on Structures and Mechanisms

• Structures and mechanisms throughout our environment have forces that act on and within them.

• We can measure forces in order to determine how they affect structures and mechanisms. This information can be used to guide the design of new structures and mechanisms.

• Forces that result from natural phenomena have an effect on society and the environment.

Properties of and Changes in Matter

• There are three states of matter.

• Matter that changes state is still the same matter.

• Physical change refers to the fact that a substance can be changed from one form to another.

• Chemical change implies the formation of a new substance.

• The properties of materials determine their use and may have an effect on society and the environment.

Conservation of Energy and Resources

• Energy sources are either renewable or non-renewable.

• Energy can neither be created nor destroyed, but it can be transformed.

• Choices about using energy and resources have both immediate and long-term impacts.

• Conservation (reducing our use of energy and resources) is one way of reducing the impacts of using energy and resources.

Biodiversity

• Biodiversity includes diversity of individuals, species, and ecosystems.

• Classification of the components within a diverse system is a beginning point for understanding the interrelationships among the components.

• Because all living things are connected, maintaining diversity is critical to the health of the planet.

• Humans make choices that can have an impact on biodiversity.

Flight

• Flight occurs when the characteristics of structures take advantage of certain properties of air.

• Air has many properties that can be used for flight and for other purposes.

Electricity and Electrical Devices

• Electrical energy can be transformed into other forms of energy.

• Other forms of energy can be transformed into electrical energy.

• Electrical energy plays a significant role in society, and its production has an impact on the environment.

• Chemical change implies the formation of a new substance.

• Society must find ways to minimize the impact of energy production on the environment.

Space

• Earth is a part of a large interrelated system.

• Technological and scientific advances that enable humans to study space affect our lives.