Unit 7

Question 1

One spin of an object on its axis. “Day”.

Answer 1

Rotation

Question 2

Imaginary line on which an object rotates.

Answer 2

Axis

Question 3

One orbit of an object around its primary. “Year”.

Answer 3

Revolution

Question 4

The path an object makes as it revolves.

Answer 4

Orbit

Question 5

The object a satellite revolves around.

Answer 5

Primary

Question 6

Any object that revolving planets and stars.

Answer 6

Satellite

Question 7

A model of the universe in which Earth is at the center of the revolving planets and stars.

Answer 7

Geocentric Model

Question 8

A model of the solar system in which Earth and the other planets revolve around the sun.

Answer 8

Heliocentric Model

Question 9

A force that moves rocks and material downhill; the force that pulls objects toward each other.

Answer 9

Gravity

Question 10

The resistance an object has to change in its movement.

Answer 10

Inertia

Question 11

The average distance between the sun and earth. 1.496x10^8km or 1AU.

Answer 11

Astronomical Unit

Question 12

Study of space, including stars, planets, and other objects in space, and their origins.

Answer 12

Astronomy

Question 13

Occurs when the moon passes between Earth and the sun, blocking the sun’s light from Earth.

Answer 13

Solar Eclipse

Question 14

Occurs when the moon passes through Earth’s shadow.

Answer 14

Lunar Eclipse

Question 15

One of two days in the year when the hours of daylight equal the hours of darkness over Earth as a whole.

Answer 15

Equinox

Question 16

Region of total shadow.

Answer 16

Umbra

Question 17

Region of partial shadow.

Answer 17

Penumbra

Question 18

One of two days in the year when hours of daylight and hours of darkness are at their greatest and least.

Answer 18

Solstice

Question 19

Tides that are least extreme; happen twice a month at first and last quarter moon phases.

Answer 19

Neap Tide

Question 20

Tides that are most extreme; occur twice a month at full and new moon phases.

Answer 20

Spring Tide

Question 21

The middle layer of the sun’s atmosphere.

Answer 21

Chromosphere

Question 22

The outer layer of the sun’s atmosphere.

Answer 22

Corona

Question 23

Distance light travels in a vacuum in one year, equal to 9.46x10^12 kilometers.

Answer 23

Lightyear

Question 24

The splitting of an atom’s nucleus into two smaller nuclei and neutrons.

Answer 24

Nuclear Fission

Question 25

The combining of two atomic nuclei to produce a single larger nucleus and much energy; the process core to form helium.

Answer 25

Nuclear Fusion

Question 26

The inner layer of the sun's atmosphere that gives off its visible light; the sun's surface.

Answer 26

Photosphere

Question 27

A huge, reddish loop of gas that protrudes from the sun's surface, linking parts of sunspot regions.

Answer 27

Prominence

Question 28

An eruption of gas from the sun's surface that occurs when the loops in sun spot regions suddenly connect.

Answer 28

Solar Flare

Question 29

A stream of electrically charged particles that emits from the sun's corona .

Answer 29

Solar Wind

Question 30

A dark area of gas on the sun's surface that is cooler than surrounding gases.

Answer 30

Sunspot

Question 31

Rocky objects revolving around the sun that are too small and numerous to be considered planets.

Answer 31

Asteroid

Question 32

A loose collection of ice, dust and small rocky particles, typically with a long narrow orbit of the sun.

Answer 32

Comet

Question 33

A streak o flight in the sky produced by the burning of a meteoroid in Earth's atmosphere.

Answer 33

Meteor

Question 34

A meteoroid that passes through the atmosphere and hits Earth's surface.

Answer 34

Meteorite

Question 35

A chunk o frock or dust in space.

Answer 35

Meteoroid

Question 36

The brightness of a star if it were at a standard distance form Earth.

Answer 36

Absolute Brightness (Magnitude)

Question 37

The brightness of a star as seen from Earth.

Answer 37

Apparent Brightness (Magnitude)

Question 38

An imaginary pattern of stars in the sky.

Answer 38

Constellation

Question 39

A huge group of single stars, star system, star cluster, dust, and gas bound together by gravity.

Answer 39

Galaxy

Question 40

A graph relating the surface temperatures and absolute brightness of stars.

Answer 40

Hertzsprung-Russell Diagram

Question 41

A large cloud of gas and dust in space, spread out in an immense volume.

Answer 41

Nebula

Question 42

The apparent change in position of an object when seen from different places.

Answer 42

Parallax

Question 43

The brilliant explosion of a dying super-giant star.

Answer 43

Supernova

Question 44

An object whose gravity is so strong that nothing not even light, can escape.

Answer 44

Black Hole