a gradual gathering of something
The accumulation of snow on the ground happened very rapidly.
alien
a life form from another planet
An alien comes from another planet.
ample
more than enough
There was an ample supply of oats to feed the horses.
articulate
to express in words
The teacher articulated the instructions for the test.
ascertain
to find out for certain
I was not able to ascertain what exactly he is going to do tomorrow.
asteroid
any of the thousands of rocky bodies that orbit the Sun, especially between the orbits of Mars and Jupiter
Many scientists believe the dinosaurs were wiped out when the Earth was hit by an asteroid.
atom
the smallest unit of a chemical element
An atom is very small, but it is very interesting.
attain
to succeed in getting or doing
When he attained his doctorate, he felt he had accomplished all his dreams.
bullet
the projectile from a gun
He was killed by a bullet.
calculation
the act of finding a number through a mathematical process
I think I made a mistakes in my calculation.
chunk
a piece, especially of jagged or random shape
A chunk of metal was ripped from his car in the accident.
comparable
similar and suitable for comparison
They say Kobe Bryant's playing style is comparable to that of Michael Jordan's.
cosmic
of or relating to the universe or outer space
We crack the cosmic codes one by one, replacing an old solution with the new one.
cosmology
a branch of science concerned with the origins, processes, and structures of the universe
She enrolled in a course on cosmology during her sophomore year at the university.
dark matter
a type of matter not yet directly observed but hypothesized to explain various gravitational effects
Cosmologists say dark matter and dark energy make up 96 percent of the universe.
debris
broken pieces of objects; trash
A fisherman caught a piece of the airship’s debris in his net.
deflect
to cause something that is moving to change direction
He deflected the ball back toward me.
humbling
causing a feeling of modesty or deference
Giving up an addiction is a humbling experience.
hypothetical
theoretical; proposed but not proven
The two men enjoyed having hypothetical discussions about what the future will be like.
manifestation
a sign that shows something clearly
He looked perfectly healthy, as there was no manifestation of the disease developing inside his body.
milestone
a significant point in development
The case was milestone in my life.
mobility
the ability to move
An elephant does not have great mobility.
particle
in physics, a very small part of matter
There are a lot of dust particles in the air.
persistence
a state or a quality of not quitting or giving up; continuing in spite of struggles
Soldiers in the army need great persistence to endure the rigorous training.
phenomenon
something that is very impressive or popular
A man eating fire was a phenomenon that he had not seen before.
radiate
to send out; to emit
The ray flowers radiate out from the rim of the disk flowers and reach to the edge of the whole flower.
radiation
the emitting of electromagnetic energy, such as light or heat
The radiation leak from the nuclear power plant
ray
a narrow stream of radiation
The sun’s warm rays covered the beach.
replicate
to repeat or reproduce
My mom cooked the most delicious meal. I wonder
spur
to cause
The coach's speech spurred her team into playing the best game of their lives.
theorist
a person who forms theories
Max Weber was a Social Action theorist who was one of the leading scholars and founders of modern sociology.
under way
in progress
Preparations are well under way for a week of special events in May.
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