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WJEC GCSE PHYSICS UNIT 2 > 2.5 STARS AND PLANETS > Flashcards

2.5 STARS AND PLANETS Flashcards

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1
Q

WHAT ARE THE OBJECTS THAT ORBIT THE SUN?

A
  • planets
  • moons
  • dwarf planets
  • asteroids
  • comets
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2
Q

ORDER THE PLANETS FROM CLOSEST TO THE SUN TO FARTHEST

A

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

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3
Q

WHERE DOES THE ASTEROID BELT LIE?

A

Between Mars and Jupiter

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4
Q

WHICH ARE THE ROCKY PLANETS?

A

Mercury, Venus, Earth and Mars

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5
Q

WHICH ARE THE GASEOUS PLANETS?

A

Jupiter, Saturn, Uranus and Neptune

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6
Q

WHAT IS A MOON?

A

A moon is a body that orbits a planet

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7
Q

WHAT IS AN ASTEROID?

A

An asteroid is a small rocky object that orbits the Sun

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8
Q

WHAT IS A PLANETARY SYSTEM?

A

Comprises a star and all the objects which orbit it. Our Solar System is a planetary system

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9
Q

WHAT IS A COMET?

A

A comet is a lump of frozen gas, rock and dust that orbits the Sun. A comet has a tail that always points away from the Sun due to the Sun’s radiation pressure

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10
Q

WHAT IS A GALAXY?

A

A huge collection of billions of stars and their solar systems. Our Solar System is a small part of the Milky Way galaxy

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11
Q

WHAT IS THE MEAN DISTANCE OF THE SUN FROM EARTH?

A

One astronomical unit (A.U)

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12
Q

WHAT SPEED DOES LIGHT TRAVEL AT?

A

3x10^8 m/s

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13
Q

DESCRIBE THE LIFE CYCLE OF A LOW MASS STAR

A

protostar -> average mass main sequence star -> red giant star -> white dwarf -> black star

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14
Q

DESCRIBE THE LIFE CYCLE OF A HIGH MASS STAR

A

protostar -> massive mass main sequence star -> red super giant -> supernova -> neutron star OR black hole

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15
Q

WHAT DOES NUCLEAR FUSION IN STARS PRODUCE?

A

All element apart from hydrogen (and some helium)

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16
Q

WHAT DO SUPERNOVAS PRODUCE?

A

Elements heavier than iron are produced. Stars and planets are formed from these elements

17
Q

HOW WAS OUR SOLAR SYSTEM FORMED?

A

Gravitational forces caused matter to get closer together creating the Sun and the planets. During formation, rocks gathered close to the Sun and formed the rocky planets, whilst gaseous substances gathered together at distances further away and formed the gas planets

18
Q

WHAT IS A HERTZSPRUNG-RUSSEL DIAGRAM?

A

A way of displaying the properties of stars and representing their evolutionary paths

19
Q

WHAT COLOUR IS HIGH TEMPERATURE?

A

Blue

20
Q

WHAT COLOUR IS LOW TEMPERATURE?

A

Red

WJEC GCSE PHYSICS UNIT 2 (9 decks)

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