1. Motion, forces and energy

1.1 Physical quantities and measurement techniques

1.2 Motion

1.3 Mass and weight

1.4 Density

1.5.1 Effects of forces

1.5.2 Turning effect of forces

1.5.3 Centre of gravity

1.6 Momentum

1.7.1 Energy

1.7.2 Work

1.7.3 Energy resources

1.7.4 Power

1.8 Pressure

2. Thermal physics

2.1.1 States of matter

2.1.2 Particle model

2.1.3 Gases and the absolute scale of temperature

2.2.1 Thermal expansion of solids, liquids and gases

2.2.2 Specific heat capacity

2.2.3 Melting, boiling and evaporation

2.3.1 Conduction

2.3.2 Convection

2.3.3 Radiation

2.3.4 Consequences of thermal energy transfer

3. Waves

3.1 General properties of waves

3.2.1 Reflection of light

3.2.2 Refraction of light

3.2.3 Thin lenses

3.2.4 Dispersion of light

3.3 Electromagnetic spectrum

3.4 Sound

4. Electricity and magnetism

4.1 Simple phenomena of magnetism

4.2.1 Electric charge

4.2.2 Electric current

4.2.3 Electromotive force and potential difference

4.2.4 Resistance

4.2.5 Electrical energy and electrical power

4.3.1 Circuit diagrams and circuit components

4.3.2 Series and parallel circuits

4.3.3 Action and use of circuit components

4.4 Electrical safety

4.5.1 Electromagnetic induction

4.5.2 The a.c. generator

4.5.3 Magnetic effect of a current

4.5.4 Force on a current-carrying conductor

4.5.5 The d.c. motor

4.5.6 The transformer

5. Nuclear physics

5.1.1 The atom

5.1.2 The nucleus

5.2.1 Detection of radioactivity

5.2.2 The three types of nuclear emission

5.2.3 Radioactive decay

5.2.4 Half-life

5.2.5 Safety precautions

6. Space physics

6.1.1 The Earth

6.1.2 The Solar System

6.2.1 The Sun as a star

6.2.2 Stars

6.2.3 The Universe

IGCSE Physics 6.1.1 The Earth Question Bank

[Maximum number: 1]

Which row about the orbits of the Earth and the Moon is correct?

approximate time
for the Earth
to orbit the Sun

approximate time
for the Moon
to orbit the Earth

1 day

30 days

1 day

365 days

1 day

365 days

30 days

[Maximum number: 1]

Which data is needed to calculate the average orbital speed of a satellite around a planet?

the distance of the
satellite from the
centre of the planet

the radius
of the planet

the period
of rotation of
the planet

the time for the
satellite to orbit
the planet once

✓

$\boldsymbol{\chi}$

✓

key
✓ = needed
x= not needed

[Maximum number: 1]

The average distance from the Earth to the Sun is $1.5 \times 10^{11} \mathrm{~m}$ .
What is the orbital speed of the Earth?

$4.0 \times 10^{5} \mathrm{~km} /$ day

$1.3 \times 10^{6} \mathrm{~km} /$ day

$2.6 \times 10^{6} \mathrm{~km} /$ day

$1.9 \times 10^{14} \mathrm{~km} /$ day

[Maximum number: 1]

The Earth orbits the Sun once in approximately 365 days.
The average radius of the orbit is $1.5 \times 10^{11} \mathrm{~m}$ .
What is the average orbital speed of the Earth?

$3.0 \times 10^{4} \mathrm{~m} / \mathrm{s}$

$1.1 \times 10^{8} \mathrm{~m} / \mathrm{s}$

$2.6 \times 10^{9} \mathrm{~m} / \mathrm{s}$

$1.3 \times 10^{15} \mathrm{~m} / \mathrm{s}$

[Maximum number: 1]

The diagram shows a star S and the initial arrangement of three planets, X, Y and Z.

Each planet orbits clockwise in a circle about S.
The time for one orbit of Y is three times the time taken for one orbit of X.
The time for one orbit of Z is twice the time taken for one orbit of Y.

Starting from the initial arrangement, which diagram shows the positions of the planets after X has made one complete orbit?

[Maximum number: 1]

The time taken for the Earth to orbit the Sun is approximately 365 days.
The average radius of the Earth's orbit around the Sun is $1.5 \times 10^{8} \mathrm{~km}$ .
What is the average orbital speed of the Earth?

$30 \mathrm{~m} / \mathrm{s}$

$4.8 \times 10^{3} \mathrm{~m} / \mathrm{s}$

$3.0 \times 10^{4} \mathrm{~m} / \mathrm{s}$

$4.1 \times 10^{10} \mathrm{~m} / \mathrm{s}$

[Maximum number: 1]

It is summer in the northern hemisphere of the Earth in June.
Which statement explains why?

The Earth is closer to the Sun in June.

The Earth spins on its axis in the opposite direction to that in which it rotates around the Sun.

The Moon is full in June.

The north pole of the axis of the Earth's rotation is tilted towards the Sun in June.

[Maximum number: 1]

A space station orbits the Earth at a distance of 7000 km from the Earth's centre. It makes 15 orbits in every 24 -hour period.

What is the speed of the space station in its orbit?

$2900 \mathrm{~km} / \mathrm{h}$

$4400 \mathrm{~km} / \mathrm{h}$

$8800 \mathrm{~km} / \mathrm{h}$

$27000 \mathrm{~km} / \mathrm{h}$

[Maximum number: 1]

Approximately how long does it take for the Moon to make one complete orbit of the Earth?

24 hours

1 month

1 season

1 year

[Maximum number: 1]

The orbit of the Moon around the Earth is modelled as a circular path of radius $3.8 \times 10^{5} \mathrm{~km}$ .
The orbital period is 29.5 days (710 hours).

What is the orbital speed of the Moon?

$5.4 \times 10^{2} \mathrm{~km} / \mathrm{h}$

$1.1 \times 10^{3} \mathrm{~km} / \mathrm{h}$

$1.7 \times 10^{3} \mathrm{~km} / \mathrm{h}$

$3.4 \times 10^{3} \mathrm{~km} / \mathrm{h}$

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