8th 1.3 Vocab
By LaDonna Aldrich-Means
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Last updated over 1 year ago
12 Questions
2 points
2
Question 1
1.
acceleration: a change in the _______ (speed, direction, or both) of a body
When the cyclists _______, they accelerate. This makes the bicycles move faster.
4 points
4
Question 2
2.
asteroid: a small object made of rock or _______ that orbits the sun
The asteroids present in the solar system revolve around the Sun between the orbits of _______ and _______. Their size can vary anywhere from 1 km to 700 km. They produce a colossal impact if they enter Earth's _______ and strike its surface.
6 points
6
Question 3
3.
atmosphere: the _______ that surround a planet
The earth's atmosphere has five layers. These layers include (in order from highest to lowest altitude): the _______ , _______ , _______ , _______ , and _______ .
3 points
3
Question 4
4.
comet: a body of _______ that travels in a long narrow orbit around the sun
Comets are bodies of frozen gases that have _______ orbits around the Sun. The _______ comet has a short orbital period. It has been spotted every 76 years since 1758.
3 points
3
Question 5
5.
crater: a large, circular _______ in the surface of a planet or other body in space usually formed when two bodies in space collide
Scientists believe the Meteor Crater in _______, Arizona was created by the impact of a celestial object nearly _______ years ago. The impact is still preserved due to the hot and dry climate of Arizona.
2 points
2
Question 6
6.
force: a _______ that is applied to an object
The _______ of gases from the exhaust of an airplane produces the force necessary to keep it moving in a forward direction.
3 points
3
Question 7
7.
gravity: a force that exists between any two objects that have _______
The gravity on the Earth is much _______ than gravity on the Moon. This is because Earth has a _______ mass.
3 points
3
Question 8
8.
kinetic energy: the energy an object has due to its _______
The kinetic energy of the _______ turns the blades of this windmill. The blades moving possess kinetic energy. The work done on the windmill by the wind is equal to the windmill's change in kinetic energy.
The child on the swing has kinetic energy when in motion. As in a _______, the kinetic and potential energies shift as the child swings back and forth.
2 points
2
Question 9
9.
mass: the amount of _______ in an object
More _______ means greater mass. The Sun's mass is much greater than that of the other planets.
3 points
3
Question 10
10.
meteor: a streak of light in the sky that forms when a piece of _______ from space burns up in Earth's atmosphere
A meteor that fell on the surface of Earth some _______ years ago created the Meteor Crater in Arizona. The hole it left measures three-fourths of a mile wide and _______ feet deep.
5 points
5
Question 11
11.
planet: a large circular mass that revolves around a _______
Jupiter is the largest planet in the solar system and is composed mainly of liquid _______ and _______ .
After scientists demoted Pluto to dwarf planet, Neptune ranks as the _______ planet in our solar system. Its atmosphere consists mainly of hydrogen, helium, and methane. _______ concentration in the outer levels give Neptune its blue color.
2 points
2
Question 12
12.
velocity: the _______ and _______ of moving objects