Earth & Space Science Fall 2019 ACP

That this animal has fur is an...

• inference
• conclusion
• observation
• opinion

Observations made during an experiment are called:

• data
• problems
• conclusions
• questions

What is the process of nuclear fusion

• the process of carrying light

• the process of two atoms fusing

• the process of gravity and inertia keeping the universe together

• the process of fusing two stars

Below is a picture of sea-floor spreading. How are the ocean crusts moving?

• Converging

• Diverging

• Sliding

• No movement

If the half life of a radioactive element is 100yrs, how long would it take for the radioactivity to reduce by one half?

• 200yrs
• 100yrs
• 50yrs
• 300yrs

The rate at which a radioactive element decays is its ____.

• quarter life
• whole life
• wonderful life 
• half life

_______________ is the process by which unstable atoms emit radiation until they become stable.

• Radiation
• Chemical Reaction
• Radioactive Decay
• Isotopes

Which particles make up the nucleus of an atom?

• protons and neutrons
• electrons and protons
• electrons, protons, and neutrons
• electrons and neutrons

Cosmic Microwave Background Radiation is a form of _________.

• Matter

• Energy

• Visible Light

• Water

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