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Gravity And The Formation Of Solar Systems
Test Description: FCAT Practice Mr. Lewey
Instructions: Answer all questions to get your test result.
1) What is gravity?
A
a force of attraction between objects that is due to their masses
B
the rotating cloud of gas and dust from which the sun and planets formed
C
an unbalanced force that makes objects move in an elliptical path
D
the point in the orbit of a planet at which the planet is farthest from the sun
2) Which of these choices states Newton’s law of universal gravitation?
A
Gravitational force increases as the mass of an object increases or as the distance between two objects decreases.
B
The square of a planet’s orbital period is proportional to the cube of the planet’s mean distance from the sun.
C
As a planet moves around its orbit, the planet sweeps out equal areas in equal amounts of time.
D
The orbit of a planet, or other body, around the sun is an ellipse, with the sun at one focus of the ellipse.
3) Chester is creating a timeline of the formation of the solar system. Which flow chart best describes the formation of the solar system?
A
solar nebula ® planetesimals ® planets ® sun
B
sun ® solar nebula ® planetesimals ® planets
C
solar nebula ® sun ® planetesimals ® planets
D
solar nebula ® ® sun ® planets ® planetesimals
4) The distance between objects, along with the masses of the objects, affect the gravitational force between the objects. Which statement is true according to Newton’s law of universal gravitation?
A
When the masses of objects increase, gravitational force decreases.
B
When the masses of objects decrease, the distance between objects decreases.
C
When distance between objects decreases, gravitational force decreases.
D
When distance between objects increases, gravitational force decreases.
5) Which term describes a small body from which a planet forms?
A
planetesimal
B
protoplanetary disk
C
orbit
D
solar nebula
6) Phillip wants to model the formation of a planet. What would his model for a planetesimal look like?
A
a small body from which a planet originated during the early development of the solar system
B
a rotating cloud of gas and dust from which the sun and planets formed
C
an elliptical path that a body follows as it travels around another body in space
D
a disk of material surrounding a young star or protostar that may eventually form planets
7) From which object did the solar system form?
A
planetesimal
B
protoplanetary disk
C
star
D
solar nebula
8) What role did gravity play in the formation of the sun?
A
Gravity caused the solar nebula to collapse toward the center, causing the center to be dense and hot.
B
Gravity caused the protoplanetary disk to become a planetesimal, which became the sun.
C
Gravity caused the protoplanetary disk to rotate and form a solar nebula, which became the sun.
D
Gravity caused small particles to collide to form larger particles called planetesimals, which eventually formed the sun.
9) Cara is explaining to her sister how the solar system formed. Which description would she use to explain the solar nebula?
A
a small body from which planets form
B
a rotating cloud of dust and gas
C
a disk of material surrounding a young star
D
a rocky core surrounded by a deep atmosphere of gas and ice
10) Who is the greatest teacher in the World?
A
Mr. Lewey
B
Neil Degrasse Tyson
C
Bill Nye the Science Guy
D
Issac Newton
*select an answer for all questions
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