Unit 1
A push or a pull that is applied to an object
What is a Force?
an item against which the motion of an object can be measured
What is frame of reference?
a region in space near a magnet or electric current in which magnetic forces can be detected
What is a magnetic field?
a type of fossil formed when sediment fills a mold of an organic object such as a fossil shell, creating a replica of that object made of sediment
What is a cast?
the spinning of a celestial body, such as a planet, around an axis
What is rotation?
the amount of matter in an object
What is mass?
the amount of energy that is stored in an object; energy that an object has because of its position relative to other objects
What is potential energy?
waves of electromagnetic energy; electromagnetic energy that people can see
What is light?
range of differences in DNA among organisms
What is genetic variation?
a nutrient used by animals
the force of gravity on an object
What is weight?
a group of parts that work together to function or perform a task
What is a system?
an interstellar cloud made up of hydrogen gas, plasma, helium gas, and dust
What is a nebulae?
one member of a pair or series of genes on specific chromosomes in specific positions
What is an allele?
the orbiting of an object around another object
What is revolution?
the speed and direction of moving objects
What is velocity?
a reaction force that pushes an object forward
What is thrust?
the distance light travels in a vacuum in one year; about 6 trillion miles
What is a light year?
the theory that a solar system evolves from a hot gaseous nebula
What is the Nebular Hypothesis?
a group of organisms that share similar characteristics and can mate with each other to produce offspring
What is a species?
a change in the velocity
What is acceleration?
What is kinetic energy?
a metal object that acts as a magnet when an electric current moves through it
What is an electromagnet?
one of the 20 types of molecules that combine to form proteins
What is an amino acid?
Energy cannot be created out of nothing, nor can it be completely destroyed. Energy can only change its form
What is conservation of energy?