Studying Earth systems, energy transfer, and the scientific method for fourth grade students.
Earth is made up of four main parts called "systems" that all work together to make our planet a great place for life. These are:
These systems are always working together. For instance, rainwater (hydrosphere) nourishes plants (biosphere) that grow in soil (geosphere), and animals breathe air (atmosphere).
Understanding how these systems interact helps us take care of our planet. If one system is harmed, the others can be affected too.
Many environmental problems happen when these systems get out of balance, like when pollution in the atmosphere affects plant and animal life.
A tree (biosphere) grows in soil (geosphere) and absorbs water (hydrosphere) and carbon dioxide from the air (atmosphere).
A river (hydrosphere) carries rocks (geosphere) and provides a home for fish (biosphere).
Earth has four main systems—geosphere, hydrosphere, atmosphere, and biosphere—that interact to support life.