Unit 1

Question 1

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

Answer 1

Tycho Brahe

Question 2

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

Answer 2

Isaac Newton

Question 3

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

Answer 3

experiment

Question 4

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

Answer 4

gravitation

Question 5

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

Answer 5

satellite

Question 6

Magnitude expresses a _____.

Answer 6

lesser and greater amount

Question 7

_____ draws an object toward a center.

Answer 7

centripetal force

Question 8

Sunspots were first described as _____.

Answer 8

blemishes

Question 9

_____ keeps the Moon in orbit about our planet.

Answer 9

centripetal acceleration

Question 10

_____ was one Greek thinker who held the heliocentric view.

Answer 10

Heraclides

Question 11

_____ built the first reflecting telescope.

Answer 11

Isaac Newton

Question 12

_____ means to spin around an axis.

Answer 12

rotate

Question 13

_____ is the force that causes rotation.

Answer 13

torque

Question 14

Inertia _____.

Answer 14

is the resistance to change in motion

Question 15

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

Answer 15

distance

Question 16

Angular momentum measures _____.

Answer 16

the momentum of an object circling about some other object

Question 17

the science that investigates the characteristics of all objects in space

Answer 17

astronomy

Question 18

the theory that the Earth is the center of our universe

Answer 18

geocentric

Question 19

the theory that the Sun is the center of our universe

Answer 19

heliocentric

Question 20

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

Answer 20

square

Question 21

The formula for calculating amount of force is _____.

Answer 21

force = mass x acceleration

Question 22

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

Answer 22

Galileo Galilei

Question 22

_____ explores all phenomena of light energy.

Answer 22

optics

Question 23

_____ is proportional to the mass of any object.

Answer 23

gravitation

Question 24

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

Answer 24

sumerians

Question 25

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

Answer 25

force of attraction

Question 26

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

Answer 26

equal and opposite

Question 27

_____ experimental results are valuable to know.

Answer 27

all

Question 28

Velocity _____.

Answer 28

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

Question 29

Acceleration is _____.

Answer 29

the rate at which a change in velocity occurs

Question 30

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

Answer 30

ptolemy

Question 31

The _____ is the view port of a telescope.

Answer 31

eyepiece

Question 32

_____ established the true shapes of planetary orbits.

Answer 32

johannes kepler

Question 33

_____ draws objects away from a center.

Answer 33

centrifugal force

Question 34

_____ means to move in a circular path.

Answer 34

revolve

Question 35

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

Answer 35

planet

Question 36

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

Answer 36

star

Question 37

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

Answer 37

Egyptians

Question 38

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

Answer 38

force

Question 39

_____ was the first known person to invent the telescope.

Answer 39

hans lippershey