Magnetism
Two magnets are placed with their north poles facing each other. What will happen, and why?
They will repel because like poles repel each other.
What are the two types of electric charges?
Positive and negative.
What is energy?
Energy is the ability to cause change or make things happen.
What is an energy transformation?
A change from one form of energy to another.
What is the fastest land animal?
Cheetah
If you have magnets that are repelling what poles could you have?
North and North or South and south
What is static electricity?
A buildup of electric charges on an object.
A moving bicycle has what form of energy?
Energy of motion.
A hair dryer blows warm air. What energy transformations are happening?
Electrical energy changes into energy of motion and heat energy.
How many sides does a hexagon have?
6
A student turns a magnet around and brings its south pole near the north pole of another magnet. What will happen?
The magnets will attract because opposite poles attract.
How can friction create static electricity?
Rubbing two materials together can cause electrons to move from one object to another.
What form of energy makes objects warm or hot?
Heat energy.
What type of energy comes from the sun?
Solar energy
Explain the flow of energy when you turn on the TV?
Electrical energy to sound and light energy
A magnet can pick up a paper clip through one sheet of paper but not through many sheets. What does this show?
Magnetic force becomes weaker as the distance between the magnet and the object increases.
Which particles move from one object to another when static electricity is created?
Electrons.
What form of energy can we hear?
Sound energy
A student claps their hands quickly and notices that their hands become warm. What energy transformation is happening?
Energy of motion changes into heat energy because of friction.
An animal that is hunted by other animals
prey
A student places a magnet near a paper clip. The paper clip moves toward the magnet. What force caused this movement?
Magnetic force
You rub a balloon on your hair and then hold it near a wall. The balloon sticks to the wall. Why?
The charged balloon causes the charges in the wall to shift slightly, creating an attraction between the balloon and the wall.
What is potential energy? give example
stored energy
A roller coaster starts at the top of a hill and moves quickly down the track. What energy transformation happens as it moves downhill?
Stored energy changes into energy of motion.
True or false, the earth revolves around the moon
false
A student has two magnets but cannot see their labels. How could the student determine which end is the north pole of each magnet?
The student could use a compass. The end of the magnet that attracts the compass's north-seeking end is the magnet's south pole; the opposite end is the north pole.
You rub two balloons on your hair. When you bring them close together, they move apart. Why does this happen?
Both balloons gained the same type of charge, so they repel each other.
What form of energy affects the temperature of the water in a swimming pool?
heat energy
A student says, “Energy disappears when a flashlight is turned off.” Is the student correct? Explain.
No. Energy does not disappear. It is transformed into different forms, such as light and heat, and can spread into the surroundings.
What force keeps us on the ground instead of floating into space?
gravity