Benchmark 8C
The Designed World: Energy Sources and Use
Grades K-2, page 193

People burn fuels such as wood, oil, coal, or natural gas, or use electricity to cook their food and warm their houses.

NSES Content Standard D 
Earth and Space Science: Properties of Earth materials
Grades K-4, page 134
Earth materials are solid rocks and soils, water, and the gases of the atmosphere. These varied materials have different physical and chemical properties, which make them useful in different ways, for example, as building materials, as sources of fuel, or for growing the plants we use as food. Earth materials provide many of the resources that humans use.

NSES Content Standard F 
Science in Personal and Social Perspectives: Types of resources
Grades K-4, page 140
Some resources are basic materials, such as air, water, and soil; some are produced from basic resources, such as food, fuel, and building materials; and some resources are nonmaterial, such as quiet places, beauty, security, and safety.