Physics — IGCSE — SyllabAI Hub

11 markeasy

Which two elements are the most commonly found in the Sun?

Choose your answer

Hydrogen and oxygen

Helium and carbon

Hydrogen and helium

Nitrogen and oxygen

21 markeasy

Light from distant galaxies is redshifted when measured on Earth.

Which of the following ideas does this provide evidence for?

The Big Bang Theory
The Universe is expanding
Distant Galaxies are moving both towards us and away from us

Choose your answer

1 only

1 and 2

2 only

1, 2 and 3

31 markeasy

Extended tier only

Which of the following describes the lifecycle of a star about the size of the Sun?

Choose your answer

interstellar hydrogen clouds → protostar → main sequence star → red supergiant → black hole

interstellar hydrogen clouds → planetary nebula → main sequence star → red giant → protostar→ white dwarf

interstellar hydrogen clouds → protostar → main sequence star → red giant → planetary nebula → white dwarf

interstellar hydrogen clouds → protostar → main sequence star → red supergiant → neutron star

41 markeasy

Extended tier only

What does the constant 2.2 × 10^–18 per second represent?

Choose your answer

1 light year

Red-shift

The CMBR

The Hubble constant

51 markeasy

Which part of the electromagnetic spectrum does the Sun radiate most of its energy in?

Choose your answer

radio, visible and gamma

infrared, visible and ultraviolet

infrared, X-rays and gamma

infrared, visible and gamma

61 markeasy

The Sun consists mostly of two elements.

What are these two elements?

Choose your answer

helium and nitrogen

hydrogen and helium

hydrogen and oxygen

oxygen and nitrogen

71 markeasy

Which statement about the Milky Way is correct?

Choose your answer

It is a galaxy.

It is a group of galaxies.

It is a group of stars outside our own galaxy.

It is a group of stars which are part of our galaxy.

81 markeasy

Which nuclear reaction powers a stable star?

Choose your answer

A nuclear fission of nuclei producing hydrogen

nuclear fission of a uranium nucleus into a krypton nucleus and a barium nucleus

nuclear fusion of a krypton nucleus and a barium nucleus into a uranium nucleus

A nuclear fusion of hydrogen nuclei producing helium

91 markeasy

Which statements about the Sun are correct?

The Sun is a star of medium size.
The Sun consists mostly of nitrogen and oxygen.
The Sun is located inside the Milky Way galaxy.

Choose your answer

1 only

1 and 2 only

1 and 3 only

1, 2 and 3

101 markeasy

Which list shows the correct order of the life cycle of a star like the Sun?

Choose your answer

nebula → main sequence star → red supergiant → neutron star

nebula → main sequence star → red giant → white dwarf

nebula → red giant → main sequence star → white dwarf

main sequence star → nebula → red giant → black hole

111 markmedium

What is the correct description of the Milky Way?

Choose your answer

Universe

Star

Galaxy

Nebula

121 markmedium

Which is the best description of redshift?

Choose your answer

Distant galaxies only emit light from the red end of the spectrum.

Only red light can reach Earth from very distant stars.

Stars in the Milky Way mostly emit light at the red end of the spectrum,

The light received from distant galaxies is moved towards the red end of the spectrum.

131 markmedium

How many years would it take light to travel from the centre of the Milky Way to the outer edge?

Choose your answer

500 years

50 000 years

100 000 years

100 000 light years

141 markmedium

Extended tier only

What is the process which makes stable stars such as the Sun shine, and which element produced in the reaction?

	Process	Element
A	fusion	oxygen
B	fission	hydrogen
C	fusion	helium
D	fission	helium

Choose your answer

151 markmedium

Extended tier only

Which of the following equations correctly represents the age of the Universe?

Choose your answer

$v=H_{0}d$

$H_{0}=\frac{v}{d}$

$\frac{1}{H_{0}}=\frac{v}{d}$

$\frac{1}{H_{0}}=\frac{d}{v}$

161 markmedium

Which statement describes redshift?

Choose your answer

All the light emitted from all distant galaxies is at the red end of the spectrum

All the light emitted by a star in the Milky Way is at the red end of the spectrum.

The light from all the stars in the Milky Way is moved towards the red end of the spectrum.

The light from stars in all distant galaxies is moved towards the red end of the spectrum.

171 markmedium

Which statement does not describe redshift?

Choose your answer

All the light emitted from all distant galaxies is at the red end of the spectrum.

The light arriving at the Earth from a receding star is always redshifted.

During redshift, the wavelength of the observed light is longer than it is if the redshift had not occurred.

The light from stars in all distant galaxies is moved towards the red end of the spectrum.

181 markmedium

Which stages in the life cycle of a star are listed in the order that they occur?

Choose your answer

interstellar dust cloud $\rightarrow$ stable star $\rightarrow$ protostar

protostar $\rightarrow$ red giant $\rightarrow$ stable star

A red giant $\rightarrow$ white dwarf $\rightarrow$ protostar

A stable star $\rightarrow$ red giant $\rightarrow$ white dwarf

191 markmedium

Astronomers observe light from distant galaxies and find that the wavelength has increased. This effect is called redshift.

What is the main conclusion from these observations?

Choose your answer

The galaxies are moving away from the Earth and the Universe is expanding.

The galaxies are moving towards the Earth and the Universe is contracting.

The galaxies are stationary and the speed of light is changing.

The Earth is at the exact centre of the Universe.

201 markmedium

The light from distant galaxies is observed to be redshifted.

Which statement correctly explains this observation?

Choose your answer

Distant galaxies are hotter than nearby galaxies.

Distant galaxies are moving away from us, stretching the wavelength of the light.

Light loses energy as it travels through space, decreasing its frequency.

The Universe is contracting, compressing the wavelength of the light.

211 markhard

Extended tier only

Which is the correct value of one light year?

Choose your answer

9.5 × 10¹⁵ km

9.5 × 10¹⁵ m

9.5 × 10¹⁵ s

9.5 × 10¹⁵ days

221 markhard

The planet Neptune has an average orbital radius of 4 500 million km. How long does it take light from the Sun to travel to Neptune?

Choose your answer

4 minutes

1 hour

4 hours

4 days

231 markhard

Extended tier only

Which row shows the correct methods for measuring galactic speeds and distances?

	Galactic speeds	Galactic distances
A	redshift	redshift
B	redshift	brightness of supernovae
C	brightness of supernovae	redshift
D	brightness of supernovae	brightness of supernovae

Choose your answer

241 markhard

Extended tier only

Hubble's law gives an expression for the Hubble constant

$H_{0}=\frac{v}{d}$

What does the equation allow astronomers to calculate?

The distance to other galaxies
The speed of galactic recession
The age of the Universe

Choose your answer

1 only

1 and 3

3 only

1, 2 and 3

251 markhard

Extended tier only

The Andromeda galaxy is 2.5 million light-years away from Earth.

What is the velocity of the galaxy as it moves away from Earth?

Choose your answer

5200 m/s

52 km/s

5.2 km/s

520 km/s

Stars & The Universe — Multiple-Choice Questions (Cambridge International IGCSE Physics): Exam Questions

Stars & The Universe — Multiple-Choice Questions (Cambridge International IGCSE Physics): Exam Questions