Name that force
Which internal force happens when you pull on both ends of a rope?
Tension
What do we call a force exerted on an object by a person or another object?
A force from a person or object is an applied force.
What do we call the pair of forces that act in opposite directions during an interaction?
They are called an action–reaction force pair.
What property allows an object to return to its original shape after being stretched?
Returning to original shape is elasticity.
Name one energy resource that can be used before processing.
Examples of resources used before processing: wood, wind, water.
What internal force is created when you squeeze a sponge?
Compression
Why does friction make it harder to slide a book across carpet than across a desk?
Carpet has more friction, making sliding harder.
When a basketball hits the floor, what is the reaction force?
Action: ball pushes on floor. Reaction: floor pushes back up on the ball.
What property causes an object to keep a new shape after being bent?
Keeping a new shape is plasticity.
Name one energy resource that must be processed before use.
Solar, nuclear, biofuel, Fossil Fuels - These require processing before use.
Which internal force pushes parts of an object in opposite directions, causing bending?
Shear
What external force is created when a stretched elastic band snaps back?
A stretched elastic snapping back is elastic force.
A balloon rocket moves forward when air rushes out the back. Identify the action and reaction forces.
Air rushing out = action. Balloon moving forward = reaction.
Why does a paper clip stay bent after you reshape it?
A paper clip stays bent because it has plasticity.
Give one example of how energy resources are used in daily life.
Any daily use of energy (e.g., heating a home).
When you twist a towel you are using
Torsion
Explain how an external force can create internal forces inside an object.
An external force pushes or pulls the object, creating internal forces like tension, compression, shear, or torsion inside it.
Two skaters push off each other. Explain why both skaters move.
Each skater experiences an equal and opposite reaction force, so both move.
A rubber band and a metal spoon are pulled. Explain which shows elasticity and which shows plasticity.
Rubber band returns to shape → elasticity. Metal spoon bent permanently → plasticity
Name one environmental, economic, or societal factor that affects energy resource selection.
Examples: pollution, cost, job creation, land use, availability.
A ruler snapping when you bend it involves 3 forces. Name 2.
Shear and tension
A cardboard box collapses when stacked with heavy books. Identify two external forces and one internal force involved.
The books apply an external force (applied + gravity). The box experiences internal compression or shear, causing collapse.
A hammer hits a nail. Describe the action force & the reaction force
Hammer → nail = action.
Nail → hammer = reaction.
A designer needs a material that can bend temporarily but return to shape. Recommend a material and explain why based on its properties.
Choose a material with elasticity so it bends temporarily and returns to shape.
Describe two responsible management practices for energy resources
Any two responsible practices:
Restoring extraction areas
Managing waste
Minimizing disruption to nature
Respecting land/resource rights