Variables
What is an independent variable?
The variable that is CHANGED in an experiment. YOU make this change.
What is a force?
A PUSH or PULL
Define "data"
Measurements... things that can be written as a quantity. Example: 5/24 of students have an October birthday
Which came first in the fossil record - sharks, or trees?
SHARKS!
What is the dependent variable?
What CHANGES as a result of the independent variable.
Potential energy is...
STORED energy in an object
What is a hypothesis?
An EDUCATED GUESS using background knowledge and observations.
What was the name of the man who wrote the theory of gravity?
Sir Isaac Newton
The things that stay the same. They are unchanged.
Kinetic energy is...
MOTION, or energy of MOVEMENT
How are hypotheses ALWAYS written?
Ms. Tam, Ms. Butzer, and Ms. Lear
Identify the IV and the DV in this scenario:
If the temperature increases, then ice cream sales will increase.
IV: temperature
DV: ice cream sales
Which would move faster when pushed with the same amount of force: a soccer ball or a bowling ball? Why?
The soccer ball would move faster when pushed with the same amount of force BECAUSE it has less mass. More force is required to move objects with more mass.
How are TITLES written in experiments?
"The effect of....... on......"
What does "Mesopotamia" mean?
The land between 2 rivers.
Identify the IV and the DV: If one toy car is pushed down a ramp covered with felt, and another toy car is pushed down a smooth ramp with no cover, then the toy car traveling down the smooth ramp will have a higher speed.
IV: type of ramp
DV: speed of toy car
What is friction?
A force that resists motion between 2 objects rubbing against each other
Why do we use line graphs or bar graphs?
To analyze and interpret data; to show relationships between variables
What is the mathematical formula for the relationship between force, mass, and acceleration?
F=ma (mass multiplied by acceleration)