Modules 1&2
Observations made using one of the 5 senses
What are Qualitative observations?
A chemical bond in which two atoms share one or more pairs of valence electrons
What is a covalent bond?
A chemical reaction that absorbs energy from its surroundings
What is an endothermic reaction?
The time rate of change of an object‘s velocity
What is acceleration?
The tendency of an object to resist changes in its velocity
What is inertia?
The substance in a solution that gets dissolved
What is a solute?
A region of space around the nucleus where electrons are most likely to be found
What are orbitals?
This gas is always present as a reactant in combustion reactions
What is oxygen?
The rate at which an object is moving at any given moment in time
What is instantaneous speed?
Friction that opposes motion once the motion has already started
What is kinetic friction?
Conclusions based on observations, previous knowledge, and available information
What is inference?
When an atom loses an electron it forms this
What is a cation?
The prefix of the second word in the name carbon dioxide indicates this
What is the prefix di- means two, so carbon dioxide means the molecule contains 2 oxygen atoms?
The slope of a distance-time graph indicates this
What is the speed?
When an object is acted on by one or more unbalanced forces, the total net force is equal to the mass of the object times the resulting acceleration
What is Newton’s second law of motion?
This metric prefix means 1,000
What is kilo?
This law states that matter cannot be created or destroyed, but matter can change
What is the Law of Conservation of Mass?
These reactions have two reactants that bond to form one product
What are synthesis reactions?
A physical measurement that contains only magnitude and does not contain directional information
What is scalar quantity?
For every action force, there is a(an) ______.
What is a reaction force?
The physical property of a liquid to resist flowing
What is viscosity?
In 450 B.C. this Greek philosopher argued atoms are the smallest unit of matter.
Who is Democritus?
How many particles are there in one mole of any substance?
One mole of any substance contains 6.02×1023 particles.
You walk 1 mile every day for exercise, leaving your front door at 9 AM and returning to your front door at 9:25 AM. What is the total displacement of your daily walk?
Since your starting point and your ending point are the same, and displacement includes direction, your displacement would be zero. Your distance is 1 mile.
When baseball players hit the ball hard enough, their bats can sometimes break. What is exerting a force on the bat causing it to break?
The ball exerted a force on the bat. This is the equal and opposite force described by Newton’s third law.