Variables
The independent variable is that variable that is ...
changed
Kinetic energy is the energy of ...
movement
Which trial will result in the most energy transfer from the weight to a nail?
Tall height and Heavy Weight
or
Short height and Light Weight
Tall height and Heavy Weight
What is potential energy?
stored energy (no movement)
The dependent variable is the variable that is ...
observed
Thermal energy is a type of what kind of energy?
kinetic
If you shake a bottle of rocks, what types of energy are present?
Kinetic and Thermal
Thermal energy occurs when what is happening?
Particles of an object are moving/bouncing off of each other.
You are testing the effect of different fertilizers on plant growth. What is the independent variable?
The total amount of energy in the universe always remains the same because of ...
the law of conservation of energy
In the winter, does a home in Texas or a home in New York use more energy?
New York (use the heater)
Potential energy is greater when an object is higher or lower in the air?
Higher
You are testing the effect of different fertilizers on plant growth. What is the dependent variable?
plant growth
Does conservation of energy and conserving energy mean the same thing?
NO. Conservation of energy means that the total amount of energy remains the same. Conserving energy is something an individual can do to use less energy in their life (turn off the lights).
Explain how potential energy is transformed into kinetic energy and vice versa on a roller coaster.
When the car is at the top of a hill, is has potential energy. When is rolls down a hill, the potential energy is transformed into kinetic energy. At the bottom of the hill, it has the most kinetic energy and no potential energy. As is goes back up, the kinetic energy is transformed back into potential energy.
Potential energy is greater for heavier or lighter objects?
Heavier
Identify the independent and dependent variable.
You are testing how far a ball rolls down a hill based on the angle of the hill. The same ball is used for each trial.
Independent = angle of hill
Dependent = how far the ball rolls.
Explain energy transformation
One type of energy is converted into another type of energy. (potential energy is transformed to kinetic energy when something starts moving)
Which home is more energy efficient?
A - LED lights, no window film, no vegetation, electric air conditioner
B - Incandescent lights, window treatment, lots of vegetation, high efficiency appliances.
Home B
Explain the term "energy transfer"
Energy is transferred from one object to another or one place to another. A ball is rolling (kinetic energy) and it hits another ball causing the second ball to start moving (kinetic energy)