ATOMS & ELEMENTS
The number of protons in an atom.
What is the atomic number?
A substance that dissolves another substance.
What is a solvent?
Energy of motion.
What is kinetic energy?
Heat transfer through direct contact.
What is conduction?
A timeline organizing Earth’s history into eras and periods.
What is the geologic time scale?
The smallest unit of matter made of protons, neutrons, and electrons.
What is an atom?
A mixture with uniform composition throughout.
What is a homogeneous mixture?
Stored energy due to position or condition.
What is potential energy?
Heat transfer by movement of fluids.
What is convection currents?
All known fossils and their placement in rock layers.
What is the fossil record?
Atoms of the same element with different numbers of neutrons.
The substance that is dissolved in a solution.
What is a solute?
Speed in a specific direction.
What is velocity?
Heat transfer that can occur through empty space.
What is radiation?
Movement of Earth’s plates that shapes the planet’s surface.
What is the tectonic cycle?
An atom that has gained or lost electrons and has a charge.
WHAT IS AN ION?
A mixture where particles scatter light but do not settle out.
What is a colloid?
Total kinetic energy of particles in a substance.
What is thermal energy?
Waves that require a medium to travel.
What are sound waves?
The process that powers stars by combining atomic nuclei.
What is nuclear fusion?
The weighted average mass of an atom based on its isotopes.
Reducing the concentration of a solution by adding solvent.
What is dilution?
The law stating energy cannot be created or destroyed.
What is the conservation of energy?
Waves that include light, radio, and X-rays.
What are electromagnetic waves?
The stages of a star’s life from birth to death.
What is the star life cycle?