Physics Unit 6 assessment

A scientific revolution began when Copernicus suggested:

• a geocentric model

• a new calendar

• a heliocentric model

What was Tycho Brahe’s biggest contribution to astronomy?

• An accurate observation of the stars and planets.

• His theory of a heliocentric universe.

• His invention, the telescope.

• His brass nose and bad temper.

Astronomer Johannes Kepler __________.

• was made head astronomer for the Church

• showed that the planets have elliptical orbits

• invented the first radio telescope

• correctly measured the constant “G”

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Galileo’s discoveries __________.

• helped him invent the kaleidoscope

• convinced him the Earth was at the center

• provided evidence that the Earth and the planets revolve around the Sun

• helped him learn about the planets Neptune and Uranus

Who invented calculus to help him understand the way objects moved in space?

• Johannes Kepler

• Isaac Newton

• Tycho Brahe

• Nicolaus Copernicus

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The magnitude of gravitational force between two objects is affected by the (a)   and. (b)   ​

• Mass of both objects
• Distance between the objects
• Shape of the objects
• Color of the objects

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The universal gravitational force is directly related to:

• The mass of the objects and the distance between them.

• The mass of the objects and the gravitational constant.

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The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its:

• mass

• distance

• acceleration

• time

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The universal gravitational force has an inverse squared relationship with:

• mass

• distance

• weight

• time

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If the (a)   is doubled, the new gravitational force is ​ (b)  

• Distance between the two objects
• 4 times smaller
• Mass of one object
• Gravitational constant

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