CAIE IGCSE Physics 6.2.2 Stars Questions

Covered syllabus points

6.2.2.1—(a) galaxies contain many billions of 6.2.2.2—One light-year is equal to 9.5 × 1015 6.2.2.3—Star life cycle: (a) forms from

[Maximum number: 1]

The nearest star to the Sun is 4 light-years away.
A spaceship travels at 0.1 % of the speed of light.
What is the total time taken for a journey from the Sun to the star and back again?

400 years

800 years

4000 years

8000 years

[Maximum number: 4]

Show that 1 light-year $=9.5 \times 10^{15} \mathrm{~m}$ .

v=s / t OR(s=) v t
( c= ) $3 \times 10^{8}(\mathrm{~m} / \mathrm{s})$
(1 year =) $365 \times 24 \times 3600(\mathrm{~s})$ OR $3.2 \times 10^{7}(\mathrm{~s})$ OR $32 \times 10^{6}$ OR $8760 \times 3600$
( s= ) candidate's speed of light × candidate's time (m)

[Maximum number: 5]

The Sun is one of many billions of stars in the Milky Way. The Sun emits a very large quantity of energy as electromagnetic radiation.

(a)

Approximately 4.6 billion years ago, the Sun formed from an interstellar cloud of gas and became a stable star.

[ 5 ]

(i)

Describe and explain what happens as an interstellar cloud of gas forms a protostar.

[ 2 ]

(ii)

Describe and explain what happens as a protostar becomes a stable star.

[ 3 ]

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CAIE IGCSE Physics 6.2.2 Stars Topic Practice

Covered syllabus points

Question 1

Question 2

Question 3

Question (a)

Question (i)

Question (ii)