Question 1

What object is missing from this list of the main objects in our Solar System? Sun, (eight) planets, ___________, moons, asteroid, comets

Accepted Answer

dwarf planets

Question 2

What kind of object is the Sun?

Accepted Answer

star

Answer

planet

Answer

moon

Answer

satellite

Question 3

Which galaxy is the Solar System in?

Accepted Answer

the Milky Way

Answer

the Mars Way

Answer

Canis Major Dwarf

Answer

Hydrus 1

Question 4

What do all stars start off as?

Accepted Answer

huge cloud of gas and dust called a nebula

Answer

red giant

Answer

white dwarf

Answer

protostar

Question 5

Which force is responsible for forming a protostar from a nebula?

Accepted Answer

gravity

Answer

friction

Answer

nuclear

Answer

propulsion

Question 6

What kind of reaction causes the expansion of a star?

Accepted Answer

nuclear fusion

Answer

combustion

Answer

nuclear fission

Answer

decomposition

Question 7

What two forces balance to keep a main sequence star stable?

Accepted Answer

fusion reaction forces outwards & gravitational forces pulling it inwards

Answer

electrostatic forces forces pulling inwards & nuclear forces pushing outwards

Answer

electrostatic forces outwards & magnetic forces pulling it inwards

Answer

fusion reaction forces pulling inwards & gravitational forces outwards

Question 8

What determines the life cycle of a star?

Accepted Answer

mass

Answer

energy

Answer

gravity

Answer

electrostatic force

Question 9

What stage is missing from the life cycle of a star with about the same mass as the Sun?

$\enspace$ protostar $\rightarrow$ main sequence star $\rightarrow$ red giant $\rightarrow$ ___________ $\rightarrow$ black dwarf

Accepted Answer

white dwarf

Answer

black hole

Answer

red supergiant

Answer

supernova

Question 10

What stage is missing from the life cycle of a star with much more mass than the Sun? $\enspace$  protostar $\rightarrow$ ______________ $\rightarrow$ red supergiant $\rightarrow$ supernova $\rightarrow$ neutron star or black hole (if must big enough)

Accepted Answer

main sequence star

Answer

nebula

Answer

red giant

Answer

white dwarf

Question 11

How are naturally occurring elements formed?

Accepted Answer

from nuclear fusion during the life cycle of stars

Answer

from nuclear fission during the life cycle of stars

Answer

from combustion of nebula gas

Answer

from radioactive decay in a main sequence star

Question 12

Which elements are only produced in a supernova?

Accepted Answer

elements heavier than iron

Answer

elements heavier than lead

Answer

helium and hydrogen

Answer

elements lighter than sodium

Question 13

How are the elements distributed throughout the universe?

Accepted Answer

massive stars going supernova (exploding)

Answer

when a black hole is formed

Answer

as the nebula gas cloud expands

Answer

as a red supergiant forms

Question 14

What force of gravity holds object in an orbit?

Accepted Answer

centripetal force

Answer

propulsion of the objects

Answer

centrifugal force

Answer

weight of the objects

Question 15

Why do objects in orbit change their velocity but not their speed?

Accepted Answer

orbits are circular so objects are constantly changing direction

Answer

orbits constantly change direction forwards and backwards

Answer

objects get faster and slower as they move around an orbit

Answer

objects are circular so they are constantly changing direction

Question 16

To change the speed of an object in a stable orbit, what factor must change?

Accepted Answer

radius of the orbit

Answer

force of gravity

Answer

size of centripetal force

Answer

mass of the object

Question 17

What term is used to describe when wavelengths of light get longer if the light source is moving away from the observer?

Accepted Answer

red-shift

Answer

blue-phase

Answer

blue-shift

Answer

light-shift

Question 18

What conclusion can be made from the fact that light from more distant galaxies is more red-shifted?

Accepted Answer

more distant galaxies are moving away faster, so the universe is expanding

Answer

the galaxies closer to us are more blue shifted

Answer

closer galaxies are racing towards the galaxies further away

Answer

more distant galaxies are moving together faster, so the universe is imploding

Question 19

What is the name of scientific theory for the origin of the universe that suggests it started off as an extremely small, hot, and dense region?

Accepted Answer

the Big Bang Theory

Answer

the theory of nuclear fusion

Answer

the black hole theory

Answer

the theory of evolution by natural selection

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