Unit 1
What did Thales predict would happen in 585 BC?
A solar eclipse.
What is a force?
A push or pull.
Action-reaction forces are equal and opposite. True or False?
True.
Is the International Space Station still operational to this day?
Yes.
How many planets does the solar system contain?
Eight.
What is the formula for speed?
Speed = distance/time
A force can only act through touch. True or false?
False. Forces can also act through fields.
What is mechanical energy?
The sum of an object’s kinetic and potential energy.
What was the first artificial object to reach Earth's orbit?
The Soviet Union's Sputnik 1.
Earth’s axial tilt is approximately 23.4 degrees. True or false?
True.
What is acceleration?
Acceleration is a change in velocity over time.
What is Newton's First Law of Motion?
An object at rest remains at rest, and an object in motion remains in motion at a constant velocity, unless acted upon by an unbalanced force.
What is a wave?
A regularly repeating disturbance that transmits energy.
Three variables that define rocks:
What is an eclipse?
An eclipse is an event where one celestial body is blocked, or the light from it is reduced, by another celestial body.
What did Isaac Newton study?
He studied force, motion, astronomy, optics, and mathematics.
For a graph, what is an interval?
An interval is a defined section of a graph.
What is magnetic force?
The force applied by a magnet.
What are the three subatomic particles that make up an atom?
Protons, neutrons, and electrons.
Which location has the least change in thermal energy as the Earth orbits the Sun?
The equator.
If a velocity time-graph has an upward slope, what does that mean?
The velocity is increasing.
What is the mathematical formula for Newton's Second Law of Motion?
Force = Mass * Acceleration
Electric force is a field force.
What is an element?
A substance that is made of only one type of atom and that can’t be made into a simpler substance.
There is no gravitational force between moon and Earth. True or false?
False. There is gravity keeping the moon in orbit around Earth.