IGCSE Physics - Earth & The Solar System

Flashcards covering key concepts related to Earth and the Solar System for IGCSE Physics.

The Earth rotates on its axis once every __ hours.

24

The Earth's axis is tilted at an angle of approximately __ degrees from the vertical.

23.5

The __ rotation of the Earth causes the cycle of day and night.

daily

During equinoxes, day and night are approximately equal in __.

length

The Sun appears to rise in the and set in the .

east; west

The four inner planets of the Solar System are rocky and small, while the four outer planets are and .

gaseous; large

A moon is a type of __ satellite that orbits a planet.

natural

Asteroids are found in the __ Belt between Mars and Jupiter.

Asteroid

A __ is made of dust and ice and has a highly elliptical orbit around the Sun.

comet

The Solar System contains one star, known as the __.

Sun

As the distance from the Sun increases, the __ speed of a planet decreases.

orbital

The __ of the Earth is approximately 365 days.

orbital period

The Earth's four seasons are caused by its around the Sun and its axis.

orbit; tilted

An object in an elliptical orbit around the Sun travels at a different speed depending on its __ from the Sun.

distance

The temperature of the __ increases as you move from the outer planets to the inner planets.

Sun

The gravitational force always acts towards the __ of the larger body.

centre