SC4S2U2 K&S Review

What type of movement is jumping?

• Physical movement

• Mental movement

• Emotional movement

• Spiritual movement

Describe how energy is transferred when a ball is thrown in the air.

• Energy is transferred from potential to kinetic as the ball moves up and down in the air.

• Energy is transferred from kinetic to thermal as the ball moves up and down in the air.

• Energy is transferred from kinetic to potential and back to kinetic as the ball moves up and down in the air.

• Energy is transferred from potential to thermal as the ball moves up and down in the air.

Explain how a wind turbine converts wind energy into electricity.

• A wind turbine converts wind energy into electricity by using water pressure

• A wind turbine converts wind energy into electricity by spinning blades that turn a generator.

• A wind turbine converts wind energy into electricity by burning fossil fuels

• A wind turbine converts wind energy into electricity by absorbing sunlight

What is the law of conservation of energy?

• Energy can be created out of nothing

• Energy can be destroyed completely

• Energy can be transformed into matter

• Energy cannot be created or destroyed, only transferred or transformed.

Compare solar energy (renewable) and coal (nonrenewable) as energy resources.

• Solar energy is renewable, abundant, clean, and sustainable, while coal is nonrenewable and a major source of carbon dioxide emissions.

• Solar energy is scarce and unsustainable, while coal is abundant and sustainable.

• Solar energy is nonrenewable and emits high levels of carbon dioxide.

• Coal is renewable and a clean source of energy.

How is energy transferred when a person eats food?

• Energy is transferred through photosynthesis

• Energy is transferred through sleeping

• Energy is transferred through breathing

• Energy stored in food molecules is transferred through digestion and metabolism.

Discuss the impact of using fossil fuels on the environment.

• Enhancing biodiversity

• The impact of using fossil fuels on the environment includes contributing to global warming, climate change, air pollution, water contamination, and habitat destruction.

• Reducing greenhouse gas emissions

• Promoting sustainable development

Why is it important to use energy resources wisely?

• Preserving energy resources for future generations is not a concern

• Using energy resources wisely has no impact on the environment

• It is better to waste energy resources to stimulate the economy

• It is important to use energy resources wisely to ensure sustainability, reduce environmental impact, and preserve resources for future generations.

Differentiate between kinetic and potential energy.

• Kinetic energy is energy at rest, while potential energy is energy in motion.

• Kinetic energy is only found in living organisms, while potential energy is found in non-living objects.

• Kinetic energy is energy in motion, while potential energy is stored energy.

• Kinetic energy is always positive, while potential energy can be negative.

Analyse the energy transfer process in a hydroelectric power plant.

• The energy transfer process in a hydroelectric power plant relies on wind turbines.

• In a hydroelectric power plant, energy is transferred through solar panels.

• The energy transfer process in a hydroelectric power plant involves converting potential energy of water into kinetic energy, which then drives a turbine to generate electricity.

• The energy transfer process in a hydroelectric power plant involves burning fossil fuels.