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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
The ability to cause change or to do work. Is a property of all matter	ENERGY
The mechanical energy of a moving object.	KINETIC ENERGY
The mechanical energy due to position	POTENTIAL ENERGY
Stored in the bonds between atoms.	CHEMICAL ENERGY
Stored in the nucleus of an atom	NUCLEAR ENERGY
Moves from one object to another as heat.	THERMAL ENERGY
Results from the movement of electrons	ELECTRICAL ENERGY
All forms of energy can be converted into another, for example, the Sun's nuclear energy changes to radiant energy that travels through space to Earth. The leaves of an orange tree take in this radiant energy. During photosynthesis the leaves change the radiant energy to chemical energy stored in the plant's cells. When you drink the orange juice, you take in this stored chemical energy. Your body changes some of the chemical energy to thermal energy to keep you warm. Some thermal energy is lost to the air as heat. You change chemical energy to kinetic energy as you move around.	ENERGY CHANGES
Energy is never lost completely, it only changes form. For example, If you drop a rubber ball onto a hard floor, the ball bounces a few times and then stops. Each bounce is lower than the one before it because the ball loses some energy as heat and sound. The energy lost from the ball is gained by the floor and the air. The same happens with mass, matter cannot be created or destroyed. Scientist then discovered that energy and matter can be changed into each other under extraordinary conditions. For example, nuclear energy results when matter changes to energy. Because of this new evidence, scientist developed a new law that states that the total amount of matter and energy does not change.	LAWS OF CONSERVATION OF MASS AND ENERGY
A flow of electric charge in a material	ELECTRIC CURRENT
A closed path along which current can flow	ELECTRIC CIRCUIT
The space around a magnet in which the magnet can exert a force on other magnets. It is strongest at the poles. Magnets attract or repel because of these.	MAGNETIC FIELD
A large number of atoms with their magnetic fields pointing in the same direction.	MAGNETIC DOMAIN
All electric charges are surrounded by an electric field if the charges are moving. If the charges are moving, they are also surrounded by a magnetic field.	ELECTROMAGNETISM
A device that changes electrical energy to kinetic energy.	ELECTRIC MOTOR
A device that changes mechanical energy into electrical energy.	GENERATORS