Physics
This force pulls objects toward each other.
а gravity
The substance with the formula H₂O.
water
The basic unit of life.
a cell
Our galaxy.
the Milky Way
A tool used to see very small objects.
a microscope
The SI unit of force.
a newton
The gas essential for breathing.
oxygen
The organ that pumps blood.
the heart
The closest star to Earth.
the Sun
The gas we exhale.
carbon dioxide
A device used to measure electric current.
an ammeter
The lightest element.
hydrogen
The process plants use to make food.
photosynthesis
The planet known for its rings.
Saturn
A state of matter: solid, liquid, and…?
gas
The law that relates voltage, current, and resistance.
Ohm’s Law?
The process of combining with oxygen.
oxidation
The molecule that carries genetic information.
DNA
Earth’s natural satellite.
the Moon
The scientist who discovered gravity.
Isaac Newton
A particle with no charge found in the nucleus.
a neutron
The chart of all chemical elements.
the periodic table
The study of heredity.
genetics
The first planet from the Sun.
Mercury
The approximate speed of light.
300,000 km/s