Unit 1
Unit 2
Moon Phases
Gravity
Bonus
100
What is potential energy? What is kinetic energy?
Potential energy is stored energy and kinetic energy is energy that is moving.
100
If the northern hemisphere is facing away from the sun, is there more or less solar energy? What season would it be?
It would be winter and there would be less solar energy.
100
How long does it take for the Moon to orbit the Earth?
one month
100
What two things determine the force of gravity between two objects?
Mass and Distance
100
If it is winter in the northern hemisphere, what season is it in the southern hemisphere and why?
It would be summer because the hemispheres experience opposite seasons.
200
What are balanced and unbalanced forces?
Balanced: Object is stationary and has a net force of zero.
Unbalanced: Causes a change of motion and has a net force greater than zero.
200
Why do we have seasons?
Earths tilt.
200
What is waxing and waning?
Waxing: Moon is illuminated on the RIGHT side and appears to be getting bigger.
Waning: Moon is dark on the RIGHT side and appears to be getting smaller.
200
When astronaut's travel to the moon, does their mass change?
The astronauts will have the same mass on the Earth and on the moon.
200
What two things influence kinetic energy?
Mass and velocity
300
Mass and kinetic energy have what kind of a relationship? Velocity and kinetic energy have what kind of relationship?
Mass and kinetic energy: Have a linear relationship (they mirror each other)
Velocity and kinetic energy: Have a exponential relationship (increases by a factor of four)
300
Opposite charges do what? Like charges do what?
Opposites ATTRACT
Like REPEL
300
The moon does what on its own axis? The moon does what around Earth?
The moon ROTATES on its own axis and REVOLVES around the Earth.
300
What holds the planets in our solar system together?
The gravity of the sun.
300
What is friction?
The resistance to motion.
400
A bowling ball (3,000 g) and a tennis ball (100 g) are all rolling down a bowling lane at the same speed. Which one has the most kinetic energy and why?
Bowling ball because it has more mass.
400
Draw a solar and lunar eclipse.
Solar: Sun, Moon, Earth
Lunar: Sun, Earth, Moon
400
What moon phase must be present for a lunar eclipse? What moon phase must be present for a solar eclipse?
Lunar: Full Moon
Solar: New Moon
400
When you increase the distance between two objects, the force of gravity between them will do what?
The force of gravity will decrease.
400
Name all eight planets in our solar system. What are the four inner planets and what are the four outer planets?
Inner: Mercury, Venus, Earth, Mars
Outer: Jupiter, Saturn, Uranus, Neptune
500
Define all three of Newtons Laws of Motion.
1st Law: A body at rest stays at rest and a body in motion stays in motion unless acted upon by and unbalanced force.
2nd Law: The acceleration of an object depends upon two variables – the net force acting on the object and the mass of the object.
3rd Law: For every action there is an equal but opposite reaction.
500
What happens to the magnetic field if you increase the number of coils on an electromagnet?
The magnetic field will get stronger.
500
Draw all eight moon phases revolving around the Earth with the sun coming in from the LEFT.
500
When you increase the mass of two objects, the force of gravity between them will do what?
The force of gravity will increase.
500
How long does Earths revolution around the Sun take?
365 days or one year.