Definitions
What is a scalar?
A quantity with only magnitude
What are the four forces that act on a flying object? (use their specific names)
gravity, lift, drag, thrust
Larger surfaces will experience _____ air resistance than smaller, streamlined objects.
higher, more, greater
What is the periodic table?
A highly organized chart of all known chemical elements, ordered by their atomic number (the number of protons in their nucleus).
What is a newton?
The SI unit to measure force
What is a free body diagram?
A representation of an object and all of the forces acting upon it.
If you drop a tennis ball and a book, which one will hit the ground first?
They will hit at the same time.
On the moon, a rocket will fly _____ because the pull of gravity on the moon is _____ than on Earth
higher/further, weaker
What is chemistry the study of?
The study of matter: properties, what matter consists of, and how atoms and molecules interact.
This person is considered the father of modern physics
Albert Einstein
What is acceleration?
A change in velocity, measuring how quickly an object speeds up, slows down, or changes direction.
What is the difference between mass and weight?
Weight depends on gravity but mass always stays the same.
Protons are _____ charged, electrons are _____ charged, and neutrons have _____ charge
positively, negatively, neutral/no
What is an atom?
The fundamental building block of all matter, the smallest unit of an element.
What is an acid? (in terms of pH)
A substance with a pH less than 7
What is a vector?
A quantity that has both magnitude and direction.
What is the relationship betweel mass, force, and acceleration?
Force=mass*acceleration
Friction ____ motion
resists, opposes
What are the two types of chemical bonds?
Ionic and covalent
What is the equation for weight?
Weight= mass * gravity
In a scientific paper, what is an abstract?
A short summary of the paper.
What is the force that pushes up against gravity called?
The normal force
Every action has an ____ and ____ reaction
equal and opposite (Newton's 3rd Law)
Give two ways you can distinguish between different elements/chemical substances:
density, melting point, boiling point, gas production, solid precipitation, etc.
This element is the most abundant in the universe and also the lightest on the periodic table
hydrogen