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GCSE Physics Year 12 > GCSE PhysEarth, StarsBigBangCards13 > Flashcards

GCSE PhysEarth, StarsBigBangCards13 Flashcards

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1
Q

A star neither collapses nor explodes because the inward force of gravity is balanced by the outward …?

A

pressure

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2
Q

The most central layer of the Earth is the …?

A

inner core

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3
Q

The second layer of the Earth out from the centre is the …?

A

outer core

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4
Q

The third layer of the Earth out from the centre is the …?

A

mantle

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5
Q

The fourth layer of the Earth out from the centre is the …?

A

crust

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6
Q

The Earth’s crust is made mostly from …?

A

basalt rock

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7
Q

The Earth’s …?… is made mostly from silica and minerals of iron, magnesium and other metals.

A

mantle

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8
Q

The Earth’s core is made from …???

A

Iron and Nickel

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9
Q

The process by which stars release energy

A

Nuclear fusion

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10
Q

The outward pressure in a star is maintained by the nuclear …?… reactions inside it

A

fusion

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11
Q

Stars are made mostly of …?…

A

Hydrogen

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12
Q

Nuclear fusion in a star turns Hydrogen into …?

A

Helium

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13
Q

The name given to the layer of the Earth made up of the crust and the solid portion of the upper mantle is the …?

A

lithosphere

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14
Q

When gravity compresses a cloud of Hydrogen so much that its temperature reaches 15 million degrees Celsius, the cloud becomes a …?

A

star

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15
Q

How light from distant galaxies provides supporting evidence for the Big Bang Theory

A

Galactic Red Shift

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16
Q

One observation that seems to provide supporting evidence for the Big Bang Theory is called the Cosmic …?… Background Radiation

A

Microwave

17
Q

The observed relative abundances of Hydrogen and …?… seem to provide supporting evidence for the Big Bang Theory

A

Helium

18
Q

According to the Big Bang theory the age of the universe is about …??… years

A

13.7 billion

19
Q

According to the Big Bang theory, as time goes by the temperature and density of the universe both …?

A

decrease

20
Q

According to the Big Bang theory, as time goes by the size of the universe …?

A

increases

GCSE Physics Year 12 (11 decks)

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