Shared Flashcard Set

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austin anders ch.19
N/A
37
Science
7th Grade
04/01/2014

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Cards

Term
astronomy
Definition
The study of the moon, stars, and other objects in space is called_____.
Term
axis
Definition
the north and south poles is earth axis.
Term
rotation
Definition
the spin earth on its axis is called rotation.
Term
revolution
Definition
is the movement of one object around the another.
Term
orbit
Definition
earth follows a path or orbit as it revolves around the sun.
Term
solstice
Definition
the when the sun is farthest north of the equator.
Term
equinox
Definition
each of these days is known as an equinox which mean equal night.
Term
force
Definition
a force is a push or a pull.
Term
gravity
Definition
this force called gravity attracts all objects towards each other.
Term
law of universal gravitation
Definition
newton's law of universal gravitation states that every object in the universe attracts every other object.
Term
mass
Definition
is the amount of matter in an object.
Term
weight
Definition
the force of gravity on an object is known as its weight.
Term
inertia
Definition
Term
newton's first law of motion
Definition
says that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force.
Term
phases
Definition
other time you see only a thin sliver the phases.
Term
eclipse
Definition
it cast a shadow on that object causing an eclipse.
Term
solar eclipse
Definition
a solar eclipse occurs when the moon passes directly between earth and the sun blocking sunlight from earth.
Term
umbra
Definition
the very darkest part of the moon's shadow the umbra
Term
penumbra
Definition
this larger part of the shadow is called the penumbra.
Term
lunar eclipse
Definition
occurs at a full moon when the earth is directly between the moon and the sun.
Term
tide
Definition
the rise and fall of ocean water that occurs every 12.5 hours or so.
Term
spring tide
Definition
their combined forces produce a tide with the greatest difference between consecutive low and high tides.
Term
neap tide
Definition
a tide with the least difference between consecutive low and high tides.
Term
telescope
Definition
a divice built to observe distant objects by making them appear closer.
Term
maria
Definition
the moon's surface has dark flat areas which galileo called maria.
Term
craters
Definition
galileo saw that there moon's surface is marked by large round pits called craters.
Term
meteoroids
Definition
now know that these crates were caused by the impacts of meteoroids chunks of rock or dust from space.
Term
rocket
Definition
is a device that expels gas in one direction to move in the opposite direction.
Term
thrust
Definition
the reaction force that propels a rocket forward.
Term
velocity
Definition
the greater the thrust the greater a rocket's velocity.
Term
orbital velocity
Definition
is the velocity a rocket must achieve to establish an orbit around earth.
Term
escape velocity
Definition
is the velocity a rocket must reach to fly beyond a planet's gravitational pull.
Term
satellite
Definition
is an object that revolves around another object in space.
Term
space shuttle
Definition
is a spacecraft that can carry a crew into space return to earth and then be reused for the same purpose.
Term
space station
Definition
is a large artificial satellite on which people can live and work for long periods.
Term
space probe
Definition
is a spacecraft that carries scientific instruments that can collect data but has no human crew.
Term
rovers
Definition
that move around on the surface.
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