12-Sapphire Physics Quiz

Who believed that mathematics is the best way to express the truth about the Universe; Sun, moon and Earth are spherical; placed Earth as the center of the Universe?

• Aristotle

• Pythagoras

• Ptolemy

• Plato

In early times, most people were convinced that the Earth was motionless and that the Sun, Moon, planets, and stars revolved around the Earth, which was considered the center of the universe. What do you call this model of the universe?

• Tychonic Model

• Heliocentric Model

• Geocentric Model

• Pythagorean Model

How did Galileo’s astronomical discoveries and observations helped weaken the support for the Ptolemaic model?

• He observed the movement of Jovian planets.

• He discovered the moons of Saturn and Uranus.

• He discovered four of Jupiter’s moons, thus proving that the Earth is not the center of motion for all objects in the universe.

• His discovery that the planet Mercury went through a change of phase similar to that our moon.

Which is NOT part of Galileo’s discoveries with the aid of his telescope?

• lunar craters

• phases of the moon

• moons of Jupiter

• phases of Venus

How did Brahe’s innovations and extensive collection of data in observational astronomy pave the way for Kepler’s discovery of his laws of planetary motion?

• He provide elegant mathematical proofs that could be used to predict future positions of stars.

• He established physical laws determining the magnitude and direction of the forces that cause the planets to move in elliptical orbits.

• He pioneered the heliocentric model of the universe.

• He used unaided eye in his measurements of the planets and stars and his data were edited by Kepler as his colleague.

Which is defined as the time rate of the change of velocity?

• motion

• speed

• velocity

• acceleration

Which law explains how rockets are launched into space?

• Law of Inertia

• Law of Acceleration

• Law of Interaction

• Law of Conservation of Momentum

"An object at rest will remain at rest; An object in motion will remain in motion in constant velocity unless acted by an external force." Which law of motion is this?

• law of inertia

• law of acceleration

• law of interaction

• law of conservation of momentum

Which Kepler's laws gives an indication of the shape of the orbits of planets?

• zeroth law

• first law

• second law

• third law

Which has more mass, a kilogram of feathers or a kilogram of iron?

• iron

• feather

• both material