Unit 6 Assessment (REVIEW)

A scientific revolution began when Copernicus suggested:

• a geocentric model

• a new calendar

• a heliocentric model

• a new constellation

Tycho Brahe’s biggest contribution to astronomy was?

• 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”

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

The universal gravitational force is directly related to:

• mass

• distance

• acceleration

• time

The universal gravitational force has an inverse squared relationship with:

• mass

• distance

• weight

• time

Two objects are attracted to each other with 36 N of gravitational force.  What would the force between them be if the distance between them were doubled?

• 9 N

• 72 N

• 18 N

• 144 N

An object traveling in uniform circular motion is moving

• inward toward the center of the circle with a constant speed and changing direction.

• tangentially to the circle with a constant speed and changing direction.

• inward toward the center of the circle with a constant direction and changing speed

• tangentially to the circle with a constant direction and changing speed. 

If the centripetal force acting on an object in uniform circular motion is removed the object will

• continue moving in a spiral until it reaches the center of the circular path. 

• stop moving.

• continue moving in a straight line with constant speed. 

• move depending on the type of force providing the centripetal force.