Life Science
The process by which plants use sunlight to make their own food.
Photosynthesis
The planet in our solar system known as the "Red Planet."
Mars
The three states of matter are Solid, Liquid, and this.
Gas
The number of lungs a human typically has.
Two
The chemical formula for water.
H_2O
This is the largest mammal in the world.
Blue Whale
The force that pulls objects toward the center of the Earth.
Gravity
Nothing in the universe travels faster than this.
Light
This organ pumps blood throughout your entire body.
Heart
The lightest element in the periodic table.
Hydrogen
Animals that eat both plants and meat.
Omnivores
The closest star to planet Earth.
The Sun
Boiling point of water in degrees Celsius.
100°C
The hard pieces of the skeleton that protect our organs.
Bones
This common kitchen substance is made of Sodium and Chloride (NaCl).
Salt
The gas that humans breathe out and plants take in.
Carbon Dioxide / CO
2
The imaginary line that divides the Earth into Northern and Southern hemispheres.
The Equator
An object that attracts iron and produces a magnetic field.
Magnet
The largest organ of the human body.
Skin
A scale used to measure how acidic or basic a liquid is.
pH Scale
The "control center" or "brain" of a biological cell.
Nucleus
A scientist who studies rocks, minerals, and the Earth's history.
Geologist
The flow of electrons through a conductor.
Electricity
The colored part of the human eye.
Iris
This metal is the best conductor of electricity.
Silver