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Science > Satellites > Flashcards

Satellites Flashcards

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1
Q

Weight is measured in

A

Newtons

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2
Q

Order of planets

A

Mercury,Venus,Earth,Mars,Jupiter,Saturn,Uranus,Neptune,Pluto

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3
Q

What is a satellite

A

Any object that orbits around a planet

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4
Q

Definition of day

A

24 hours,the time it takes to bring the Earth to spin once on its axis

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5
Q

definition Moon

A

A large lump of rock orbiting around a planet

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6
Q

Defenition of Sun

A

The star that the Earth orbits arounds

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7
Q

Definition of planet

A

A planet is a large object that orbits a star

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8
Q

Defenition of year

A

The length of time it takes a planet to go around the Sun

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9
Q

Definition of Solar System

A

The solar system consists of the Sun and everything that orbits, or travels around, the Sun

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10
Q

Definition of Constellation

A

A constellation is a group of stars

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11
Q

Light year definition

A

a unit of length in astronomy equal to the distance that light travels in one year or about 5.88 trillion miles (9.46 trillion kilometers)

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12
Q

Universe definition

A

all of space and everything in it including stars, planets, galaxies, etc.

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13
Q

Defenition of Galaxy

A

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.

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14
Q

Defenition of Milky way

A

The Milky Way is the Galaxy in which the solar system is in

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15
Q

The temperature of the plabet will change

A

The closer to the sun the hotter it will be the furtherst the coldest

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16
Q

The force of gravity on other planets is greater

A

because they have greater mass

17
Q

The force of gravity deacreases

A

as you get further away from the surface of a planet

18
Q

To calculate the weight of an object on another planet

A

Mass x gravity=weight

19
Q

The weight

A

Is the effect of gravity on an object

Gravity causes weight

20
Q

Mass is a measure

A

Of how much matter is in an object.The unit is the kilograms(kg)

21
Q

To work out the weight of an object

A

Weight=Mass x gravity

22
Q

Difference between polar and GESTIONARY satellites

A

The difference is
GESTIONARY-rotates with earth focused at the same point it rotates west to East
Polar-Moves over poles to get an image of the whole earth (North to South Pole)

23
Q

Geostationary and Polar uses

A

Polar:Weather and Spying

Geostationary :Navigation and communication

24
Q

Different ways in which scientists can find out the solar system disadvantages-advantages

A

Telescopes-a telescope of the ground to look through the esrtb atmosphere an advantage is much to offer cheap lower risk of getting damaged,accesable.Desadvantages Deficent Data,Image quality

Satellite Telescope-a space-based telescope allow for observation outside the Earth and light pollution.good image quality,you can see outside of earth.difficult to mantain,can’t be serviced and vulnerable to atmosphere

Probes-to look at other planets advantage of being smaller and requiring less resources, traveling farther over longer periods of time, and going places too dangerous for humans
No access,takes longer time for radio signals from space to earth.

25
Q

Reasons we have seasons

A

We have seasons because the earth spins in its axis which is tilted at an angle of 23.5°
at some times of the year a hemisphere of the earth is closer to the sun so it recives more sunlight so the days will be longer therefore it will be summer

26
Q

Lunar Eclipse

A

Moon moves into the shadow of earth

27
Q

Partial Eclipse

A

The moon only covers part of the sun

28
Q

Models of our early Solar System

A

Very Early-Everything orbiting around the earth
Heliocentral -Planets orbiting the sun
Elliphical orbit-Now able to accurately predict planet prediction

29
Q

How is it different to our early solar system

A

Kepler started by working out the speed of Mars at different places around its orbit .
The orbit were ellipses not circles,he discovered the speed change

30
Q

Evidence of our current solar system

A

Kepler started by working out the speed of Mars at different places around its orbit, and discovered that its speed changed. Once he worked out the orbits of the planets using this idea, his model matched observations very well.

31
Q

The yearly orbit changed with its distance of the sun

A

The planets orbit the sun but if the planet is close will take less to orbit yet of the closure it irs further the planet will take longer

32
Q

Difference between Geostationary and Polar

A

Polar-Moves over poles to get an image of the whole earth (North to South pole)
Geostationary-rotates with earth focussed at the same point it rotates West to East

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