ENERGY TRANSFER
WHAT IS ENERGY
THE ABILITY TO DO WORK
What is force?
a push or pull upon an object resulting from the object's interaction with another object.
When the Moon sits between the Sun and the Earth, the Moon is in what phase?
New Moon
What is force?
A push or pull in a particular direction
As the distance between two objects increases the pull of gravity …
decreases
Emily lives near a wind farm that powers her house. On a windy day, a wind turbine charges a generator, and that power is transformed into energy that travels all the way to her house. Emily decides to heat her leftover pizza in the microwave. What forms of energy are occurring in this example (in order from first to last)?
Wind energy → light energy → heat energy
The arrow of the compass is a small magnet. One end of it is attracted to Earth's magnetic north pole. Which force allows the compass to show direction?
Magnetism
What is the phase called when we see less and less of the Moon?
Waning
A yo-yo pulls when it ________________________.
Goes up
Which planet has the strongest gravitational force?
Jupiter
Light energy travels in ________________________________ .
electromagnetic waves made up of tiny particles called photons
Friction is a force that acts in a(an) ______________ direction of movement.
opposite
What is the phase called when we see more and more of the Moon?
Waxing
When it is hard to pedal your bike and you oil the chain, what makes your bike easier to ride?
Friction on the bike has decreased.
What causes ocean tides?
The gravitational pull of the Moon
Which of the following is not an example of an energy transfer occurring?
Two toy cars hit each other head-on which causes them both to stop.
A roller coaster that is stopped at the top of the hill with only stored energy.
A player kicking a football for the extra point.
An air hockey puck hits another puck causing it to move to the other side of the table.
A roller coaster that is stopped at the top of the hill with only stored energy.
What is inertia?
The property of matter by which it continues at rest unless that state is changed by an external force
The Earth spins on an angled tilt called a (an)?
axis
In order for a heavy box to be moved across the floor, what must happen?
The force pushing the box must be greater than the force of gravity.
What is gravitational force?
The force attraction exerted between objects due to their masses.
Energy that comes from vibrations moving through something is called____________.
Sound energy
How quickly an object’s motion is changed depends on the ____________ acting and the object’s mass.
force
Which phase is the moon in when half of the lit portion of the Moon is visible after the waxing crescent phase? It comes a week after a New Moon and the right half is lit.
First Quarter Moon
What characteristics do magnetic substances have?
Magnetic substances push or pull objects they are not touching.
Which of the following characteristics of a spaceship would change if it traveled to the moon?
Weight