KS4 Physics Space

Our solar system consists of:

• Only the Sun

• The Sun and the Moon

• The Sun, planets, and other celestial bodies

• Only planets

Our solar system is a small part of the ________.

• universe

• galaxy

• planet

• continent

A cloud of dust and gas, like the type from which stars form, is called a:

• nebula

• galaxy

• comet

• asteroid

At the start of a star’s life cycle, the reactions that take place in the dust and gas pulled together by gravity are:

• nuclear fusion reactions

• chemical reactions

• gravitational interactions

• magnetic interactions

What exerts an outwards force on the star during its life cycle?

• Nuclear fusion

• Gravity

• Magnetic fields

• Radiation pressure

Describe the life cycle of a star with a mass similar to the Sun, using the diagram provided.

• A star with a mass similar to the Sun goes through stages of nebula, main sequence, red giant, and white dwarf.

• A star with a mass similar to the Sun goes through stages of nebula, main sequence, supernova, and black hole.

• A star with a mass similar to the Sun goes through stages of nebula, red giant, supernova, and neutron star.

• A star with a mass similar to the Sun goes through stages of nebula, main sequence, red supergiant, and black hole.

The process in stars that produces all the naturally occurring elements is called:

• Nuclear fusion

• Nuclear fission

• Radioactive decay

• Chemical reaction

What are supernovae?

• A type of star

• A type of galaxy

• An explosion of a star

• A black hole

What is the role of gravity in orbital motion?

• Gravity keeps objects in orbit by providing the necessary centripetal force.

• Gravity has no effect on orbital motion.

• Gravity pushes objects away from each other in space.

• Gravity only affects objects on Earth.

What is the difference between natural satellites and artificial satellites?

• Natural satellites are celestial bodies that orbit a planet, while artificial satellites are man-made objects placed into orbit.

• Natural satellites are man-made objects placed into orbit, while artificial satellites are celestial bodies that orbit a planet.

• Both natural and artificial satellites are man-made objects placed into orbit.

• Both natural and artificial satellites are celestial bodies that orbit a planet.