all unit 5

Question 1

compass

Answer 1

used to measure objects azimuth

Question 2

azimuth??

Answer 2

angle measured clockwise from North

Question 3

altitude??

Answer 3

angle above horizon

Question 4

astrolabe???

Answer 4

device used to measure the altitude of an object

Question 5

who thought the earth was the centre of the universe(geocentric)???

Answer 5

Aristotle & Ptolemy

Question 6

who thought the sun was the centre

(heliocentric)???

Answer 6

Copernicus

Question 7

how do we know the sun rotates??

Answer 7

spots moved across surface and disappeared

Question 8

how does having a larger lens on a telescope help??

Answer 8

produces finer detail

Question 9

refracting telescope???

Answer 9

have lens for their objective & give better images than reflector telescopes

Question 10

reflecting telescopes???

Answer 10

overcome problem or different colours not focusing & can be made very large

Question 11

law of universal gravitation??

Answer 11

there is gravitational force between all objects (gravity pulls planets towards sun)

Question 12

why do stars twinkle??

Answer 12

motion of earths atmosphere refracts the light randomly ADAPTIVE OPTICS HELP CANCEL OUT TWINKLING WHEN LOOKING THROUGH TELESCOPE

Question 13

light year??

Answer 13

distance that light travels in one year

Question 14

astronomical unit??

Answer 14

distance from earth to the sun

Question 15

electromagnetic radiation??

Answer 15

light, radio waves, infrared waves(heat), ultraviolet waves, X-rays and gamma rays

Question 16

radio astronomy??

Answer 16

uses radio waves to learn about the composition of stars

Question 17

radio objects??

Answer 17

objects in space that give off large amounts of radio waves

Question 18

what is the brightest radio object in our galaxy??

Answer 18

the sun followed by jupiter

Question 19

radio telescopes??

Answer 19

gave astronomers lots of information about the universe because they could penetrate dust clouds

Question 20

spectroscope??

Answer 20

passes a beam of light through a prism to produce a spectrum of colour

Question 21

three types of spectra???

Answer 21

1) BRIGHT LINE SPECTRUM
- only bright lines
2) CONTINUOUS SPECTRUM
- colour all blend together
3) DARK LINE SPECTRUM
- dark lines on colours

Question 22

star approaching??

Answer 22

BLUE SHIFTED!!!!

Question 23

star moving away???

Answer 23

RED SHIFTED!!!!

Question 24

what is a rocket??

Answer 24

tube that contains combustible material in one end and a payload on the other

Question 25

payload??

Answer 25

device that rocket carries

Question 26

how does a rocket work???

Answer 26

action/reaction principal

Question 27

ballistic missile???

Answer 27

a bomb powered by a rocket engine

Question 28

why did the Americans capture Werner Von Braun???

Answer 28

he knew how to make ballistic missiles so they made him help launch the first U.S. space program

Question 29

job of early computers???

Answer 29

calculate and control orbits of space crafts

Question 30

gravitational assist???

Answer 30

uses gravity of a planet to speed up rocket and change direction

Question 31

CCD??

Answer 31

charge couple devices convert light signals into electric signals in digital format

Question 32

Hubble telescope??

Answer 32

named after Edwin Hubble launched April 1990

Question 33

communication satellites??

Answer 33

used for radio, television and telephones

Question 34

low orbit satellite??

Answer 34

200-800 km high

USED FOR TELEPHONES

Question 35

what is abbey???

Answer 35

a hoe!!!!

Question 36

celestial bodies??

Answer 36

sun, moon, stars and planets

Question 37

geosynchronous orbit??

Answer 37

36000 km high
synchronized with earths rotation
RADIO AND TELEVISION

Question 38

remote sensing???

Answer 38

taking measurements of earth from space

• shows healthy/unhealthy vegetation
• tracks erosion
• image water pollution
• track weather

Question 39

sun??

Answer 39

huge good of mostly hydrogen

so hot gases glow

Question 40

terrestrial planets??

Answer 40

rocky composition

MERCURY VENUS EARTH AND MARS

Question 41

gas planets??

Answer 41

JUPITER SATURN URANUS

Question 42

why is Pluto not a planet??

Answer 42

-dwarf planet

TO BE A PLANET IT MUST DOMINATE ITS NEIGHBOURHOOD

Question 43

lunar eclipse??

Answer 43

when the earth comes between the sun and the moon

Question 44

solar eclipse??

Answer 44

when the moon comes between the earth and sun

Question 45

first successful orbit of a satellite??

Answer 45

SPUTNIK 1 (1957)

Question 46

first man in space??

Answer 46

Yuri Gagarin VOSTOK 1 (1961)

TOOK 108 MINUTES

Question 47

Apollo program??

Answer 47

goal was to send 3 people to the moon

NEIL ARMSTRONG

Question 48

Skylab??

Answer 48

United States first space station

Question 49

space shuttle??

Answer 49

• shaped like a plane

- carried crew to international space station

Question 50

hazards of living in space??

Answer 50

we need earth like environment to survive

Question 51

microgravity??

Answer 51

when the force of gravity is greatly reduced

Question 52

electrolysis??

Answer 52

splits water molecules into hydrogen and oxygen

Question 53

frame of reference??

Answer 53

set of axes used to describe position or motion of objects