Energy
What is the main difference between renewable and non-renewable energy resources?
Renewable energy can be replenished naturally, while non-renewable energy resources cannot be replaced once used.
What does buoyant force mean?
It is the upward force that makes objects float in a fluid.
What are two opposing forces that act on an object in flight?
Thrust & Drag or Weight & Lift
Name one advantage of using renewable energy sources.
They produce less pollution compared to non-renewable sources
What determines whether an object will float or sink in water?
If the weight of the object is less than the buoyant force, it will float; if it's more, it will sink.
What is thrust?
Thrust is the force that propels an object forward, such as the engines of an airplane.
Give an example of a non-renewable energy resource.
Oil, natural gas, or coal.
Name a material that is likely to float in water.
Wood or plastic.
How does lift differ from weight in the context of flight?
Lift is the upward force that enables an object to rise, while weight is the downward force due to gravity.
How do various provinces and territories in Canada meet their energy needs?
They use a mix of energy sources including hydroelectric, wind, solar, and fossil fuels based on local resources.
Conduct an experiment to test if a basketball floats in saltwater. What do you expect to happen?
The basketball will likely float because the buoyant force is greater in denser saltwater.
Describe how traditional technologies, like kites, reflect an understanding of forces in flight.
Kites use lift and drag to stay in the air, showing how forces interact in flight.
Describe one disadvantage of using non-renewable energy resources.
They contribute to environmental damage and are limited in supply.
Why do some objects float in freshwater but sink in saltwater?
The difference in density between the fluids affects the buoyant force.
Explain how drag affects the flight of an object.
Drag is the resistance an object faces as it moves through the air, which can slow it down or affect its flight stability.