Unit 1 Exam

Most scientists believe the Big Bang Theory explains which of the following questions?

• How our planets and moons formed

• How our universe began

• How the sun turns hydrogen into helium

• How fast light travels through space

Which of the following is NOT true about the Big Bang Theory?

• It is the scientific explanation of how life began on Earth and evolved over time.
• It is the scientific explanation for the origin of the universe.
• It states that the universe expanded from a single point and is still expanding today.
• It states that the universe used to be much hotter and smaller.

Which of the following is evidence of the Big Bang Theory?

• Cavemen heard a loud bang at the beginning of time.
• The universe isn't moving
• The universe is expanding
• The universe is getting smaller

Which of the following is the best description of the Big Bang Theory?

• The Big Bang Theory is the prevailing model about the universe’s origin and is supported by observations of the universe’s expansion.
• The Big Bang Theory is just one of the ideas about the universe’s origin, many of which are equally respected by the scientific community.
• The Big Bang Theory states that pre-existing matter was compacted into a hot and dense form and suddenly exploded into infinite, empty space.
• The Big Bang Theory is the scientific explanation of how the Sun, Earth, and the rest of the Solar System were formed at the beginning of time.

the smallest particles of matter that still retain the characteristics of that element are called

• atoms
• nuclei
• dust 
• molecule

Define nuclear fusion.

• Nuclear fusion – combining lighter atoms to make heavier ones – is what makes it possible.

• Nuclear fusion – splitting lighter atoms to make heavier ones – is what makes it possible.

• Nuclear fusion – combining heavier atoms to make lighter ones – is what makes it possible.

• Nuclear fusion – splitting heavier atoms to make lighter ones – is what makes it possible.

This process, called nuclear fusion, is the energy source of all __________.

There may be more than one answer for this questions.

• planets

• suns

• stars

• plants

Process wherein light elements such as Helium and Hydrogen form.

• Stellar Nucleosynthesis

• Supernova Nucleosynthesis

• Big bang Nucleosynthesis

• Neutron Capture

A process where elements heavier than Iron are formed.

• Alpha Ladder Process

• Neutron Capture Process

• Supernova Nucleosynthesis

• Big bang Nucleosynthesis

Process by which elements are created within the star.

• Stellar Nucleosynthesis

• Big bang Nucleosynthesis

• Supernova Nucleosynthesis

• Dwarf Nucleosynthesis