Out of this World
This is the study of Earth's atmosphere and weather.
meteorology
Elements are made up of these tiny particles.
atoms
The function of this body system is to supply oxygen and remove carbon dioxide. The lungs are just one part of it.
respiratory system
This law of motion states that a body at rest remains at rest and that a body in motion continues to move in a straight line unless some outside force affects it.
Newton's first law of motion
The genetic material that determines the traits of that organism.
DNA
This is the weight of the atmosphere as felt on Earth.
air pressure
These have a positive electrical charge and attracts the negatively charged electrons. Counting these in the nucleus of an atom tell you its atomic number.
protons
This is a random, unexpected change in or damage to the genetic information within a cell.
mutation
A change in the motion of an object (acceleration) depends on the mass of that object and the amount of this applied to it. It's often expressed using this equation:
F = m * a
force
This basic mechanical device changes the direction or size of a force to make work easier.
simple machines
This consists of the Sun, eight planets, many moons, and smaller bodies such as asteroids and comets.
the solar system
These sub-atomic particles have no electrical charge at all.
neutrons
The evolutionary process where organisms with traits best suited to their environment are more likely to survive and reproduce. Also called, "survival of the fittest."
natural selection
According to Newton's third law, when you jump forward off a small boat, the boat moves in this direction because you and the boat both push on each other.
backwards
Hurricanes spin around a low-pressure center called this
the eye (of the storm)
Along with the Sun, this object's gravitational pull causes the ocean tides on Earth.
the Moon
This scientific concept states that the material involved in a chemical reactions isn't conjured from nowhere nor magically deleted--the amount of stuff stays the same.
the law of conservation of mass/matter
The biological process by which green plants, algae, and cyanobacteria convert light energy from the sun into chemical energy (or "food")
photosynthesis
The force of attraction that every object exerts on other objects due to their mass.
gravity
This is a disease in which the body does not produce enough insulin.
diabetes
This percentage of Earth's surface is covered by oceans.
70%
In this state of matter the particles are free to move about in any direction. It has no definite shape and no definite volume.
a gas
The introduction this kind of organism that may reproduces rapidly, lacks natural predators in the new habitat, and/or displaces native flora and fauna.
invasive species
This force always acts opposite the direction of motion when two surfaces rub or slide against one another.
friction
These are the muscles that control the heartbeat. They are involuntary.
cardiac muscles