Universe Exam

Which force holds electrons around the nucleus?

• Gravitational force

• Electromagnetic force

• Strong nuclear force

• Weak nuclear force

Which is a property of magnetic fields?

• They always point from south to north

• They are produced by moving electric charges

• They only exist in solids

• They are not affected by electric currents

Which direction is the force on a charged particle moving in a magnetic field?

• Parallel to the magnetic field

• Perpendicular to both the motion and the magnetic field

• Opposite to the motion

• In the same direction as the motion

If you increase the current in a wire, what happens to the magnetic field around it?

• It decreases

• It stays the same

• It increases

• It disappears

Which is the largest planet in our solar system?

• Earth

• Mars

• Jupiter

• Saturn

Which object in the solar system has ice and a glowing tail near the Sun?

• Asteroid

• Comet

• Dwarf planet

• Moon

Compare the orbits of asteroids and comets.

• Both have circular orbits near the Sun

• Asteroids have more circular orbits, comets have more elliptical orbits

• Comets have circular orbits, asteroids have elliptical orbits

• Both have highly elliptical orbits

Which galaxy contains our solar system?

• Andromeda Galaxy

• Milky Way Galaxy

• Triangulum Galaxy

• Whirlpool Galaxy

Which tool do astronomers use to see faraway objects in space?

• Microscope

• Telescope

• Stethoscope

• Periscope

What does a light-year measure?

• Time

• Distance

• Speed

• Mass