Chemistry
This particle in an atom has a negative charge.
electron
This molecule carries genetic information in most living organisms.
DNA
This type of rock forms from cooled lava or magma.
Igneous
This is the unit of force in the International System of Units (SI).
newton
This invention by Wilhelm Röntgen allowed doctors to see inside the human body.
X-ray machine
The modern periodic table is arranged by increasing this property.
atomic number
This is the largest organ of the human body.
skin
This is the supercontinent that existed around 300 million years ago.
Pangaea or Pangea
Force is equal to mass times this quantity.
acceleration
This invention by Robert Fulton made river transportation more efficient.
Steamboat
This is the only metal that is liquid at room temperature.
Mercury
This is the term for a physical characteristic, such as eye color, determined by genetics.
trait
This metamorphic rock forms from limestone under heat and pressure.
Marble
This is the energy of an object due to its motion.
kinetic energy
This scientist invented the polio vaccine in 1955.
Jonas Salk
This term describes a molecule with uneven distribution of charge.
polar molecule
This type of muscle is found only in the heart.
Cardiac muscle
This is the name of the theory that describes the movement of Earth’s plates.
plate tectonics
The energy stored in an object due to its position or height is called this.
potential energy
This invention by Johannes Gutenberg revolutionized the spread of information in Europe.
printing press
This type of reaction involves the combination of two substances to form one.
Synthesis reaction
This type of symbiotic relationship benefits both organisms involved.
Mutualism
This era is known as the "Age of Dinosaurs."
Mesozoic Era
This is the effect that causes the pitch of a siren to change as it moves toward or away from you.
Doppler effect
This invention by Louis Pasteur helps preserve food by killing harmful bacteria.
Pasteurization