Electrical energy flows along a path, called a circuit. Electrical energy can be dangerous. The use and consumption of electricity has changed with technology over time. People of different races, cultures and genders have developed energy technologies that have significantly impacted daily life and society. Matter has mass and takes up space.
Matter exists in a solid, liquid or gas state and can change forms.
Heating and cooling can change the properties of matter. Two or more materials can be combined to form a new substance that has properties different from the original materials. Water is a type of matter. Water has surface tension, which is the result of water molecules adhering to one another. Substances that are less dense than water will float in water.