C2.1

demonstrate an understanding that energy is the ability to move or change something

C2.2

demonstrate an understanding that the Sun is Earth’s principal source of energy, including how it warms the air, land, and water; is a source of light for Earth; and makes it possible for plants to grow

C2.3

identify food as a source of energy for living things

C2.4

identify everyday uses of various sources of energy

C2.5

demonstrate an understanding that humans get the energy resources they need from the world around them, and that the supply of many of these resources is limited

C2.6

describe seasonal differences in how we use energy and in the forms of energy we use