A difference exists between the natural and the human-made world.
A system is made of parts, and the parts can interact.
A technological world requires an understanding of how things are made and can be improved.
Anything on or near the earth is pulled downward by the earth’s gravity.
Asking questions and making observations help a person understand how technology works and may be modified.
Different modes of transportation move people from one place to another.
Each structure is designed for a purpose.
Earth processes occur over such long time spans and such large areas that maps and models are used to help understand them.
Ecosystems can be controlled by technology.
Electric circuits may produce or use light, heat, sound and magnetic energy.
Electric circuits require a closed pathway through which an electric current can pass.
Energy can be found in moving objects, light, sound, and heat.
Energy is produced in many forms and should not be wasted.
Humans must plan, use materials and select appropriate tools to complete a tasks.
Humans use tools, technology, and devices to help them to do a variety of things.
Light from the sun is an important source of energy for living and nonliving systems, and some source of energy is needed for all organisms to stay alive and grow.
Many processes and tools are used to make products.
Materials have different properties. Some materials transfer heat more rapidly than others or some materials conduct electricity better than others.
Most ground water eventually flows through streams, rivers and lakes and returns to the ocean.
Moving objects in contact with each other produce heat, and electrical, mechanical, and living things often produce heat.
Objects in the sky have patterns of movement that can be observed.
Rock is composed of different combinations of minerals.
Safety is a major concern for all technological development and use.
Soils develop by the breakdown of rocks by weathering and the addition of organic material. Soil also contains many living organisms.
Technological design process involves problem solving and designing solutions to problems.
Technology allows people to send messages to one another in a variety of ways.
Technology is designed to have an impact on a living being’s health.
Technology may have an effect and influence on society and the environment.
The design process includes identifying and investigating a problem, generating ideas, developing objects, testing/evaluating, and sharing findings with others.
The Earth rotates on its axis once every 24 hours, giving rise to the cycle of night and day. The Earth’s rotation causes the sun, moon, stars, and planets to appear to orbit the Earth once each day.
To have a sound you need to have a source, a medium, and a receiver.
Vibrating objects make sound, and sound can make things vibrate. The bigger the vibration, the louder the sound. The faster the vibrations, the higher the perceived pitch.
Water from precipitation can seep into the ground, run off, or evaporate.
Weather variables such as temperature, barometric pressure, wind direction and speed, cloud type, cloud cover, and precipitation can be observed measured and recorded to identify patterns. Basic weather conditions change in predictable patterns.
When liquid water disappears, it turns into a gas (water vapor) in the air. It can reappear as a liquid when cooled or as a solid when cooled further. Clouds and fog are made up of tiny water droplets or ice crystals. When such droplets or crystals get large enough, they fall as precipitation.
When warmer things are put with cooler things, the warmer things get cooler and the cooler things get warmer until all are at the same temperature.
