The Sun is a star in a galaxy containing billions of stars. The solar system contains the Sun and its planets. The weight of an object depends upon its mass and the gravitational field strength.
Which is the correct order, starting with the smallest and ending with the largest?
Planet - star - galaxy
Planet - galaxy - star
Star - planet - galaxy
Which is the third planet from the Sun?
Which force keeps the planets in orbit?
Why does an astronaut weigh less on the Moon than on the Earth?
The Moon has no atmosphere
The Moon has no gravity
The force of gravity is weaker on the surface of the Moon than on the surface of the Earth
What is the weight of a 20kg box on the Earth?
The orbits of the planets are:
Slightly squashed circles
The further away from the Sun:
The faster the planet moves
The hotter the planet is
The longer the planet's orbit takes
Why is a day on Mars about 37 minutes longer than a day on Earth?
Martian watches don't keep very good time
Mars spins more slowly on its axis than Earth does
Mars spins faster on its axis than Earth does
In which direction does the Earth spin?
From west to east
From east to west
From north to south
Why do we have seasons on Earth?
The Earth is closer to the Sun in summer than it is in winter
The Sun is brighter in summer than it is in winter
The Earth's axis is tilted