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Edexcel IGCSE Physics (b) Motion in the universe Question Bank

Practise naming cosmic structures, drawing orbit relationships, comparing orbit shapes and using orbital-speed equations with data.

Syllabus
First assessment 2019
Course
Physics 4PH1

Exam points

  • draw orbit diagrams showing moons around planets and planets or comets around the Sun
  • calculate orbital speed or period using v = 2πr/T with unit conversions
  • evaluate gravitational field strength claims by comparing constants from table data

Covered syllabus points

8.2 Universe, galaxies and solar system8.3 Gravitational field strength8.4 Gravity and orbits8.5 Orbits of comets, moons and planets8.6 Orbital speed equation

(b) Motion in the universe question 1

[Maximum number: 5]

This question is about astrophysics.

Question (a)

(a)

Diagrams A , B , C and D show different orbital paths for object Y orbiting object X .

Figure for Question (a) — Edexcel IGCSE Physics
[ 4 ]

Question (i)

(i)

Table 1 gives some possible names for object X and object Y .Complete the table by placing one tick ( ✓ ) in each row to show which orbital path is correct for each combination of object X and object Y .Each orbital path may be used once, more than once, or not at all.

Table for Question (i) — Edexcel IGCSE Physics
[ 3 ]

Question (ii)

(ii)

Give the name of the force that causes one object to orbit another object in space.

[ 1 ]

Question (b)

(b)

Table 2 gives information about four different stars in the same galaxy as the Sun.

Table 2

Table 2

[ 1 ]

Question (i)

(i)

Give the name of the galaxy that contains the Sun and the stars shown in table 2.

[ 1 ]

(b) Motion in the universe question 2

[Maximum number: 4]

This question is about astrophysics.

Question (a)

(a)

Which of these is a large collection of billions of galaxies?

A

Milky Way

B

nebula

C

solar system

D

universe

[ 1 ]

Question (b)

(b)

Which statement explains why the gravitational field strength on the Moon is less than the gravitational field strength on Earth?

A

the Moon is further away from the Sun than the Earth

B

the Moon has less atmosphere than the Earth

C

the Moon has less mass than the Earth

D

the Moon has greater density than the Earth

[ 1 ]

Question (c)

(c)

Describe the differences between the orbit of the Moon and the orbit of a comet. You may include a diagram to support your answer.

[ 2 ]
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