ch.9 section 2
When you eat food, you are taking in energy that first came from.....
the sun's energy
When you are active, chemical energy of food is converted into which of the following types of energy?
a.kinetic energy b.thermal energy c.mechanical energy d.potential energy The answer is A, kinetic energy.
As the skateboarder speeds down through the bottom of the half-pipee, which of the following types of energy is at its maximum?
a.mechanical energy b.kinetic energy c.potential energy d.elastic potential energy The answer is B, kinetic energy.
Which of the following types of energy is present in the wound-up rubber band in a toy airplane??
a.mechanical energy b.kinetic energy c.potential energy d.elastic potential energy The answer is D, elastic potential energy.
When the skateboarder reaches the top of the half-pipe, which of the following types of energy is at its maximum?
a.mechanical energy b.kinetic energy c.potential energy d.elastic potential energy The answer is C, potential energy.
a change from one form of energy to another is called a(n).....
energy conversion
When riding a bike, your legs transfer ... energy to the pedals by pushing them around in a circle?
kinetic
When the rubber band on the airplane is released, the stored energy becomes..... energy, spinning in the propeller.
kinetic
Work is made easier when a(n) ..... changes the direction or size of the force needed to do the work.
machine
A stretched rubber band stores .... energy?
pontential
Which of the following types of energy comes from the food you eat?
a.chemical energy b.thermal energy c.light energy d.nuclear energy The answer is A, chemical energy.
Which of the following types of energy from food is used to maintain body temperature?
a.chemical energy b.thermal energy c.light energy d.nuclear energy The answer is B, thermal energy.
Define photosynthesis...
Photosynthesis uses light energy to make new substances that has chemical energy.
Which of the following types of energy do plants use to make chemical energy?
a.gravitational energy b.thermal energy c.light energy d.nuclear energy The answer is C, light energy.
Energy from the sun is measured
...
Give two examples of energy conversions that take place within a hair dryer?
1.Electrical energy is converted into thermal energy. 2.Electrical energy is converted to kinetic energy.
Name two common energy conversions that involve electrical energy?
1.Kinetic energy 2.Thermal energy
How is the chemical energy from a tree converted into thermal energy?
The chemical energy from a tree is converted into thermal energy through burning of wood.
