unit 1

Question 1

The mass of one object and the mass of a second object determines the _____ between them.

Answer 1

force of attraction

Question 2

_____ means to move in a circular path.

Answer 2

Revolve

Question 3

_____ draws objects away from a center.

Answer 3

Centrifugal force

Question 4

_____ experimental results are valuable to know.

Answer 4

All

Question 5

_____ was the first known person to invent the telescope.

Answer 5

Hans Lippershey

Question 6

_____ established the true shapes of planetary orbits.

Answer 6

Johannes Kepler

Question 7

_____ divided the sky into degrees, minutes, and seconds to plot sky positions, measures we still use.

Answer 7

Sumerians

Question 8

Velocity _____.

Answer 8

is the distance and direction traveled by a moving object in a certain period of time

Question 9

_____ explores all phenomena of light energy.

Answer 9

Optics

Question 10

All forces occur in pairs that are _____ to each other.

Answer 10

equal but opposite

Question 11

The _____ is the view port of a telescope.

Answer 11

eyepiece

Question 12

Change in an object’s motion is proportional to the _____ impressed or applied.

Answer 12

force

Question 13

_____ draws an object toward a center.

Answer 13

Centripetal force

Question 14

_____ means to spin around an axis.

Answer 14

Rotate

Question 15

A(n) _____ is a large, solid body that orbits a star.

Answer 15

planet

Question 16

Magnitude expresses a _____.

Answer 16

greater amount and lesser amount

Question 17

_____ built the first reflecting telescope.

Answer 17

Isaac Newton

Question 18

The formula for calculating amount of force is _____.

Answer 18

force= mass x acceleration

Question 19

_____ held the geocentric view, which was accepted as true for over 1,500 years.

Answer 19

Ptolemy

Question 19

Acceleration is _____.

Answer 19

the rate at which a change in velocity occurs

Question 19

The time it takes a planet to orbit its sun varies with the planet’s _____ from it.

Answer 19

distance

Question 19

A _____ is a smaller body revolving around a larger body.

Answer 19

satellite

Question 20

A(n) _____ is an act designed to discover a truth.

Answer 20

experiment

Question 20

_____ described the law of universal gravitation and even named the phenomenon.

Answer 20

Isaac Newton

Question 20

_____ is the force that causes rotation.

Answer 20

Torque

Question 21

_____ is the attractive force of two objects for each other.

Answer 21

Gravitation

Question 22

Inertia _____.

Answer 22

is the resistance to change in motion

Question 23

Sunspots were first described as _____.

Answer 23

blemishes

Question 24

Angular momentum measures _____.

Answer 24

the momentum of an object circling about some other object

Question 25

_____ made observations that provided the clue to mathematically defining planetary movements, all without a telescope.

Answer 25

Tycho Brahe

Question 26

_____ first used the telescope for astronomy, discovering mountains on the Moon.

Answer 26

Galileo Galilei

Question 27

_____ was one Greek thinker who held the heliocentric view.

Answer 27

Heraclides

Question 28

A _____ is a gaseous body that shines by its own light.

Answer 28

star

Question 29

_____ keeps the Moon in orbit about our planet.

Answer 29

Centrifugal acceleration

Question 30

Gravitation is inversely proportional to the _____ of the distance between any two objects.

Answer 30

square

Question 31

_____ had a calendar that consisted of 365 days and three seasons.

Answer 31

Egyptians

Question 32

the science that investigates the characteristics of all objects in space

Answer 32

astronomy

Question 33

the theory that the Earth is the center of our universe

Answer 33

geocentric

Question 34

the theory that the Sun is the center of our universe

Answer 34

heliocentric

Question 35

_____ is proportional to the mass of any object.

Answer 35

Inertia