Example Test 🛰️☄️

what happens when compress a gas

a. The temperature increases with no effect on the overall pressure
b. The pressure increases, therefore the temperature increases
c. The pressure increases with no effect on the overall temperature
d. The pressure decreases, therefore the temperature increases

the pressure increases, therefore the temperature increases

What is the Chandrasekhar limit?

a. A mass limit for a neutron star
b. A mass limit for a white dwarf
c. A radius limit for a neutron star
d. A radius limit for a white dwarf

mass limit for a white dwarf

Why are incredibly hot temperatures necessary for nuclear fusion to occur?

a. Extreme temperatures are needed to provide atoms with enough energy to overcome the repulsive force between neutrons

b. Extreme temperatures are needed to provide atoms with enough energy to overcome the repulsive force between neutrinos

c. Extreme temperatures are needed to provide atoms with enough energy to overcome the repulsive force between electrons

d. Extreme temperatures are needed to provide atoms with enough energy to overcome the repulsive force between protons

extreme temperatures are needed to provide atoms with enough energy to overcome the repulsive force between electrons

If you replaced the mass of the Sun with a black hole of equal mass, what would happen?

a. Everything in the Solar System would be sucked in
b. All of the planets' orbital speeds would significantly increase
c. Nothing would change about the orbits of objects in the Solar System

nothing would change about the orbits of objects in the solar system

it takes how many hydrogen atoms to fuse into one helium atom?

a. 1
b. 2
c. 3
d. 4

4

what determines a star's core pressure and temperature?

a. Its size
b. Its mass
c. Its luminosity
d. The rate of nuclear fusion in the core

its mass

which of the following is not one of the processes that occur in the cores of high mass stars

a. Helium capture
b. The CNO cycle
c. Heavy element fusion (O, Ne, Mg, etc.)
d. The proton-proton chain

the proton-proton chain

T/F all fusion in the cores of stars stops at magnesium (Mg)

false

T/F the photosphere is the region of the sun where photons are released into space, however, we've developed telescopes capable of seeing all the way down into the radiative zone.

false

T/F low mass stars can fuse and produce elements all the way up to iron
(Fe) before transitioning into the red giant phase

false

T/F most elements present on the periodic table are produced by stars, either in the cores or by form of stellar explosions

true

T/F low mass stars are more commonly found in the universe than high mass stars

true

what is the distance between the Earth and the Sun?

a. 1 AU
b. 1 light-year
c. Less than 7
d. We haven't been able to make this measurement yet

1 AU

Which of the following correctly lists celestial objects in order of increasing size

a. Universe, galaxy, planet, star, moon
b. Moon, planet, star, galaxy, universe
c. Moon, planet, galaxy, star, universe
d. Planet, moon, star, galaxy, universe

moon, planet, star, galaxy, universe

where did the big band occur?

a. Due east towards the Pisces-Peruses supercluster
b. The Big Bang is a TV show, not a scientific theory
c. Everywhere, all at once
d. In the direction of the Virgo cluster

everywhere, all at once

what are the shapes of the orbits of the planets when all motion is taken into account

a. Circles
b. Ellipses
c. Helixes
d. Triangles

helixes

what does a spectrum do?

a. A spectrum splits an atom into 2 smaller atoms
b. A spectrum refracts white light into the colors of the rainbow
c. A spectrum causes an electron to descend 1 or more energy levels, emitting a photon in the process
d. A spectrum counts the number of photons at every wavelength (or frequency)

a spectrum counts the number of photons at every wavelength (or frequency)

T/F a photon with a higher frequency will have a longer wavelength and higher energy

false

T/F the center of gravity of the solar system is located at the center of the sun

false

Red is a higher temperature color than blue

false

T/F an electron will absorb a photon if it descends one or more energy levels of an atom

false

A space rock that is sand- to boulder-sized

a. Meteoroid
b. Meteor
c. Meteorite
d. Meteoride

meteoroid