Earth Science
The layer of gases that surrounds the Earth.
Atmosphere
The smallest unit of an element that retains the properties of that element.
Atom
The measure of the amount of matter in an object.
Mass
The time it takes for Earth to complete one rotation on its axis.
24 hours
The basic unit of life in all living organisms.
Cells
A large, naturally occurring community of flora and fauna occupying a major habitat, such as a forest or tundra.
Biome
A substance made of two or more elements chemically combined in a fixed ratio.
Compound
The unit of force named after a famous scientist.
Newton
The natural satellite that orbits the Earth.
Moon
The organelle known as the powerhouse of the cell.
Mitochondria
The process by which water vapor turns into liquid water, often forming clouds.
Condensation
The table that organizes all known elements by increasing atomic number.
Periodic Table
The rate of change of velocity per unit of time, often discussed in terms of increasing or decreasing speed.
Acceleration
The force that keeps planets in orbit around the Sun.
Gravity
The process by which plants use sunlight to make glucose from carbon dioxide and oxygen.
Photosynthesis
The long-term average weather (temperature and precipitation) in an area.
Climate
The negatively charged particles that orbit the nucleus of an atom.
Electrons
The physical law stating that for every action there is an equal and opposite reaction.
Newton's Third Law of Motion
The phase of the Moon when it is completely illuminated as seen from Earth.
Full Moon
The molecules that carry genetic instructions in living things.
DNA
The continuous movement of carbon atoms between the Earth's atmosphere, oceans, living organisms, and soil
Carbon Cycle
A change in which one or more substances are converted into different substances, with distinct properties.
Chemical Reaction
The principle that states energy cannot be created or destroyed, only transformed or transferred.
Law of Conservation of Energy
The star at the center of our solar system.
Sun
The part of the cell cycle where the cell divides into two daughter cells.
Mitosis