Force
What are two forces that exist on Earth but not on space?
Friction and Gravity
"Energy is neither created or destroyed. It only changes form."
What is this law?
The law of conservation of energy
What is energy of motion
Kinetic energy
If I am going to reproduce an experiment, why is it important that I follow the exact same steps that the original person did?
So I don't get inaccurate data.
What is purposefully changed in an experiment?
Independent variable.
If gravity is always pulling you down, then what right now is pushing you back up?
The ground/floor
what type of energy is a combination of potential and kinetic energy?
Mechanical Energy
If a ball is thrown up in the air and allowed to fall down to the ground, when will its potential energy be the greatest?
In the air at the highest point.
A scientist performs a medical study and reports that a specific amount of a new medicine cures a disease. Why should other scientists follow the same procedure to test the new medicine?
To verify that the medicine works
A student lets a toy car roll four times down a ramp that is 1 m long. Each time the student covers the surface of the ramp with a different material. The student measures the time it takes the car to roll down the ramp.
What is the dependent variable in this experiment?
The time it takes for the car to roll down the ramp.
What is a force?
A push or pull
When I stretch a rubber band, what kind of energy does that rubber band have?
Potential Energy
What is stored energy?
potential energy
Jamie wants to know what battery brand lasts the longest. She puts one type of battery in a radio, one type in a TV remote, one in an Xbox controller, and one in a clock.
What did she do wrong in this experiment?
She should have kept the appliances the same and used them the same.
4 groups did an experiment where the stretched a rubber band and recorded how far it stretched as they added weights to it.
What is my independent variable?
The weights
Force isn't only about how big and strong something is. What else can be added to make there be more force?
speed
How do humans get chemical energy?
Eating and/or Drinking
What is the law of conservation of energy?
Energy is not created or destroyed. It just changes form.
Why is it important to repeat an experiment more than once?
To make sure the results are consistent
Jacob has 4 different ramps all set to different heights. On each ramp, he rolls a marble down the ramp and records how long it takes to reach the end.
What is the independent variable in this experiment?
Ramp Height
Jimmy looks across the street and sees a boy being dragged by his dog. What can you infer about the force of the dog pulling on the boy and the boy pulling on the dog?
The forces are unbalanced. The dog is pulling with more force.
Describe the energy of a cart rolling down from the top of a hill.
_________energy is ___________ into ________ energy
Potential energy is transformed into kinetic energy.
What are the 3 types of energy in a battery?
Chemical, potential, and electrical
If your hypothesis turns out to be incorrect, what should you do.
Revise your hypothesis
Dr. Smith teaches two groups of rats to find a piece of tasty rat chow in a maze. One group of rats is given a drug meant to help them learn the maze while the other group is not. One week after learning the maze, he tests the rats and records how long it takes them to find the rat chow.
What is my control group?
The group of rats that did not receive the drug