Stars and Galaxies

Which of the following galaxies is the location of a solar system?

• Elliptical galaxy

• Spiral galaxy

• Irregular galaxy

• Rounded galaxy

Why is the Sun classified as a star?

• The Sun is a ball in orange colour.

• The Sun has a large body that can reflect light from the universe.

• The Sun can produce its own light and heat.

• The Sun is the largest object in our solar system.

What is a supernova?

• The formation of red super-giant.

• The death of a red giant.

• An explosion of a red supergiant.

• Very bright light emitting from a red giant star.

What is likely to result after the explosion of immense star?

• Neutron star

• Red supergiant

• White dwarf

• Black hole

Which statement about a galaxy is true?

• A galaxy is classified according to its colour.

• A galaxy consists of giant star.

• A galaxy releases harmful radioactive rays.

• A galaxy is a vast collection of stars, dust, gases and other celestial bodies.

Which of the following statements is not true?

• All energies on the Earth originate from the Sun.

• The universe is made of all objects in outer space.

• The galaxies are located within the universe.

• All objects that exist in the universe are permanent.

What is the correct characteristic of a black hole?

• Visible from Earth

• Formed from a red giant

• Has low gravitational pull

• Space that does not allow any mass to escape from it

Which of the following star is the hottest?

• Blue-coloured star

• White-coloured star

• Red-coloured star

• Yellow-coloured star

How does the Sun get its heat and light?

• From burning hydrogen on its surface.

• From thermonuclear reactions in its core.

• From compression of hydrogen on its core.

• From solar flares and prominences on its surface.

Which type of star gives out pulsing electromagnetic waves?

• Red giant

• Black dwarf

• White dwarf

• Neutron star