Environmental Impacts
What is the Sun?
A yellow dwarf star located at the center of the solar system.
What is an element?
A pure substance that cannot be broken down.
What is friction?
Force that resists the sliding or rolling of one solid object over another.
What is electrical energy?
Associated with electrical charge and flow.
What are simple machines?
Basic mechanical device to apply force.
How does the Sun impact the environment?
Fuels photosynthesis, drives weather patterns, causes seasons, and supports life on Earth.
What is a compound?
Any substance composed of identical molecules consisting of atoms of two or more chemical elements.
What is a balanced force?
Occurs when two forces of equal magnitude act in opposite directions.
What is chemical energy?
Associated with chemicals.
What are some examples of simple machines?
Lever, pulley
What is the difference between fossil fuels and alternative fuels?
Fossil fuels are non-renewable resources while alternative fuels are derived from renewable resources.
What is a mixture?
A material made up of two or more different chemical substances.
What is an unbalanced force?
Occurs when the net force acting on an object is not zero, meaning the forces are not equal and opposite, causing the object to accelerate or change its state of motion.
What is the law of conservation of energy?
Energy cannot be created or destroyed.
What are the other kinds of machines?
Complex and compound
What is the average time it takes to have a fossil fuel be made?
Over millions of years.
What is an example of a mixture?
Air, salad, and seawater.
What are the similarities between balanced and unbalanced forces?
They both act on objects as pushes or pulls, having both magnitude and direction.
What is nuclear energy?
Form of energy released from the nucleus.
Why do we use machines?
To make work more efficient
Compare the time span of renewability between fossil fuels and alternative fuels.
Fossil fuels are non-renewable and have a long formation time while alternative fuels don’t.
Give an example of an element, compound, and mixture.
Element: iron, neon
Compound: water, table salt
Mixture: Oil, Saltwater, Sand and water
How does gravity work relative to balanced forces?
When balanced, gravity is counteracted by an equal and opposite force, resulting in no movement.
Compare and contrast mechanical and chemical energy.
Mechanical: energy of motion or position
Chemical: stored in bonds between atoms and molecules.
What is the similarity between a pulley and the hydraulic press?
Both transmit and modify force