The video explores energy efficiency and conservation, explaining the difference between the two. It highlights the importance of using energy-efficient appliances and conserving energy through behavior. The concept of phantom loads and the significance of Energy Star appliances are discussed. The video also delves into the impact of greenhouse gases, particularly carbon dioxide, on climate change. Finally, it explains the carbon cycle, detailing how carbon moves through different spheres of the Earth.

What is the main difference between energy efficiency and energy conservation?

• Energy conservation is a scientific law.

• Energy efficiency is about behavior, while conservation is about equipment.

• Energy efficiency is about equipment, while conservation is about behavior.

• Both terms mean the same thing.

What is a phantom load?

• Electricity used by devices when they are turned off.

• A type of energy-efficient appliance.

• A method to conserve water.

• A renewable energy source.

What does the Energy Star label indicate?

• The appliance is the cheapest available.

• The appliance is the most energy-efficient.

• The appliance is the largest in size.

• The appliance is the most popular.

What information do Energy Guide labels provide?

• The warranty period of the appliance.

• The annual energy consumption and cost.

• The brand popularity.

• The color of the appliance.

How do greenhouse gases affect the Earth's climate?

• They reduce the amount of sunlight reaching the Earth.

• They trap heat in the atmosphere.

• They cool down the Earth's surface.

• They have no effect on the climate.

Which gas is a major contributor to the greenhouse effect?

• Oxygen

• Carbon dioxide

• Nitrogen

• Helium

What is the carbon cycle?

• The cycle of plant growth and decay.

• The rotation of the Earth around the sun.

• The cycle of water evaporation and precipitation.

• The process of carbon moving through different spheres of the Earth.

How have human activities impacted the carbon cycle?

• By stopping the carbon cycle completely.

• By increasing carbon levels through the burning of fossil fuels.

• By making the carbon cycle faster.

• By reducing carbon levels in the atmosphere.

What happens to carbon dioxide when it is absorbed in water?

• It turns into solid carbon.

• It evaporates immediately.

• It becomes oxygen.

• It creates acidic water.

What is the role of the biosphere in the carbon cycle?

• It stores carbon in the form of fossil fuels.

• It is the main source of carbon emissions.

• It is a smaller reservoir where plants and animals store carbon.

• It has no role in the carbon cycle.