A product of the environment used by humans and other organisms
What is natural resource
100
The process by which organisms with favorable variations survive and reproduce
What is natural selection
100
A cloud of gas and dust in space
What is nebula
100
An electrical charge marked with a minus sign
What is negative
100
The sum of all the forces acting on an object
What is net force
200
neither acidic or basic
What is neutral
200
A chemical reaction in which an acid and a base combine to form water and a salt
What is neutralization reaction
200
a subatomic particle with a neutral charge and a mass of 1 amu
What is neutron
200
a small star consisting of neutrons that forms after the supernova of a smaller massive star
What is neutron star
200
the principle that an object at rest will remain at rest and an object traveling at a constant speed in a straight line will continue to do so unless an unbalanced force acts on it.
What is Newton's first law of motion
300
The principle that a force acting on an object is equal to the product of its mass and its acceleration
What is Newton's second law of motion
300
The principle that when one object exerts a force on a second object, the second object exerts an equal but opposite force on the first object
What is Newton's third law of motion
300
Any of the elements in group 18 of periodic table, very unreactive
What is noble gas
300
an element that does not have the properties of a metal
What is nonmetal
300
an imaginary line perpendicular to a surface
What is normal line
400
the energy stored in the nuclei of atoms
What is nuclear energy
400
the joining of small atomic nuclei to form a larger atomic nucleus
What is nuclear fusion
400
a macro molecule made up of nucleotides
What is nucleic acid
400
the building block of DNA and RNA
What is nucleotide
400
the dense center of an atom containing protons and neutrons. Also the name of an eukaryotic organelle that controls cellular activity
What is nucleus
500
information gathered through the senses or using scientific instruments
What is observation
500
a flow of water in one direction within the ocean
What is ocean current
500
the layer of rock under the oceans
What is oceanic crust
500
the path that a planet or other space bodies take as it resolves around another larger space body
What is orbit
500
a taxonomic group smaller and more specific than a class