D.1. Stallar Quantities
IBDP Physics
Question 1
What is the main difference between spiral galaxies and elliptical galaxies?
A) Spiral galaxies contain young blue stars, while elliptical galaxies contain red giants.
B) Spiral galaxies have a disc shape with spiral arms, while elliptical galaxies are spherical.
C) Spiral galaxies have irregular shapes, while elliptical galaxies are perfectly round.
D) Spiral galaxies have high gas and dust content, while elliptical galaxies have low gas and dust content.
Question 2
Define the term "light year" and provide its equivalent distance in meters.
A) The distance traveled by sound in one year; 9.46 × 10^15 meters.
B) The distance traveled by light in one year; 9.46 × 10^15 meters.
C) The distance traveled by light in one day; 3.26 light years.
D) The distance traveled by light in one minute; 3.09 × 10^16 meters.
Question 3
What is the process by which stars like the Sun are formed, and what determines how a star changes during its lifetime?
A) Supernova explosion; The star's distance from the galactic center.
B) Black hole formation; The star's initial temperature.
C) Nebula condensation; The star's original mass of material.
D) Planetary collision; The star's age.
Question 4
What are binary stars, and why are they important in astrophysics?
A) Stars with irregular orbits; They help in predicting solar flares.
B) Stars with variable luminosity; They aid in studying dark matter.
C) Stars that rotate about a common center of mass; Their interactions allow properties to be measured.
D) Stars with multiple planetary systems; They provide insights into galaxy formation.
Question 5
What is the significance of the gas giants in our solar system?
A) They are the closest planets to the Sun.
B) They have solid surfaces suitable for colonization.
C) They contain high amounts of ice and strong gravitational fields.
D) They are known for their numerous moons and asteroid belts.
Question 6
What is the end result of the explosion of a red supergiant star?
A) Neutron star
B) White dwarf
C) Red dwarf
D) Black hole
Question 7
What is the distance unit defined as the average radius of the Earth's orbit around the Sun?
A) Light year
B) Parsec
C) Astronomical unit (AU)
D) Kilometer
Question 8
Which type of star is undergoing nuclear fusion of hydrogen into helium?
A) Red giant
B) Red dwarf
C) Neutron star
D) Main-sequence star
Question 9
What is the name for matter in galaxies and clusters of galaxies that is too cold to radiate?
A) Dark energy
B) Dark matter
C) Interstellar medium
D) Brown dwarf
Question 10
How is a supernova Type Ia different from a supernova Type II?
A) Type Ia involves a white dwarf, while Type II involves a red supergiant
B) Type Ia is less energetic than Type II
C) Type Ia results in the formation of a neutron star, while Type II forms a black hole
D) Type Ia occurs in binary star systems, while Type II occurs in isolated stars