Forces in Action
This force resists motion when two surfaces rub together.
What is friction?
This property describes a material that can return to its original shape after being stretched.
What is elasticity?
What are non-renewable resources and give an example.
resources that cannot be replaced quickly can take millions of years to create. coal, oil, natural gas, nuclear (uranium) energy
This force pushes an airplane upward into the air.
What is lift?
This is the force that allows objects to float in water.
What is buoyancy?
This force occurs when a rope or string is pulled tight.
What is tension?
This property describes a material that keeps a new shape after being bent or stretched.
What is plasticity?
What are renewable energy sources. give an example.
Energy sources can be replaced naturally over time. ex. solar, wind, hydro
This force pulls an airplane downward toward Earth.
What is weight/gravity?
If an object is less dense than water, it will do this.
What is float?
This force stretches or compresses something like a spring or elastic band.
What is elastic (spring) force?
Twisting a wet cloth uses this type of force.
What is torsion?
Name one factor that affects how we choose an energy resource.
What is cost / environmental impact / availability / efficiency?
This force pushes against an object moving through air.
What is drag?
If an object is more dense than water, it will do this.
What is sink?
This force happens when parts of a material slide past each other in opposite directions.
What is shear force?
Squeezing a sponge demonstrates this type of force.
What is compression?
This means using energy in a way that meets our needs without harming future generations.
What is responsible management (or sustainability)?
This force moves an airplane forward.
What is thrust?
This happens when the upward buoyant force equals the downward force of gravity.
What is floating (balanced forces)?
Explain Newton's Third law and give an example.
What is for every action force there is an equal and opposite reaction force?
explain how internal and external forces are related.
External forces can cause internal forces within an object. squeezing a marshmallow = compression
Why might a community limit the use of fossil fuels?
What is to reduce pollution, protect the environment, and conserve resources?
Name 3 traditional technologies involving forces of flight.
bow and arrow, slingshot, fishing spear, boomerang
How many marbles did a boat hold the most of before sinking?
32