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Science 10 > Astronomy unit > Flashcards

Astronomy unit Flashcards

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1
Q

What is the closest part of the milky way to earth?

A

Bulge

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2
Q

Which part of the milky way has the highest concentration of stars?

A

The centre

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3
Q

T/F Do stars have one exact lifecycle?

A

False

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4
Q

Stellar nebulas Produce these in various sizes and colours

A

Stars

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5
Q

Stars shine by,

A

Fusing hydrogen to form helium

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6
Q

When average stars run out of fuel, they expand to become:

A

A red giant

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7
Q

Average stars end their life as:

A

White Dwarfs

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8
Q

Massive stars explode as:

A

Supernovas

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9
Q

Supernovas leave behind,

A

Neutron star + Black hole

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10
Q

Low mass (1-9)

A

White Dwarf

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11
Q

Medium mass (10-15)

A

Neutron star

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12
Q

High mass (25-40)

A

Black hole

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13
Q

You can predict the death of a star by:

A

The mass

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14
Q

Hubbles law:

A

The farther away a galaxy is, the faster it is

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15
Q

Redshift:

A

Longer infrared wavelengths moving away from earth

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16
Q

Blueshift

A

Shorter ultra-violet wavelengths moving closer to earth

17
Q

CHIME

A

Infrared telescope in BC’s observatory

18
Q

Solar flux

A

Indicator of solar activity (Space weather)

19
Q

Radio waves

A

Electromagnetic waves

20
Q

Light years

A

The distance light travels in one year

21
Q

Astronomical units

A

Distance from the earth to the sun (AU)

22
Q

Parallax

A

Things that appeared to move compared to the background

23
Q

What is the absorption Spectra?

A

Gas absorbs certain wavelengths, and leaving a lot of light invisible (Same for emission spectrum

24
Q

What is the Doppler Effect?

A

The change in wavelength frequency during motion from its observer

25
Q

what is the sound of an ambulance an example of?

A

The Doppler Effect

26
Q

1 example of the BBT

A

Cosmic Background radiation

27
Q

2nd example of the BBT

A

Redshift of spectra = things moving away (expanding)

28
Q

3rd example of the BBT

A

75% Hydrogen + 25% Helium

Science 10 (2 decks)

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