Energy can not be ______ or ______. What is always true about energy?
Created or Destoryed, it is always transformed!
This principle is a fundamental concept in physics.
Give an example of energy transformations in everyday use.
Solar panels convert sunlight into electricity for our houses.
This showcases a practical application of energy transformation.
What is often the result of energy transformations?
Energy escapes into the environment
This is a common occurrence in many energy processes.
How are energy resources categorized?
- Renewable energy
- Nonrenewable energy
Renewable energy sources are sustainable, while nonrenewable sources are finite.
What is the difference between renewable and nonrenewable energy?
Renewable energy is like the sun, which will never run out, but nonrenewable energy is fossil fuels and they will run out.
This distinction is crucial for understanding energy sustainability.
Give examples of nonrenewable energy resources.
- Fossil fuels like coal and gas
- Wood
Nonrenewable resources are limited and will deplete over time.
Give examples of renewable energy resources.
- Sun
- Water
- Wind
- Biomass
These resources can be replenished naturally.
What are fossil fuels? Give examples.
Non-renewable items: oil, gas, and coal
Fossil fuels are derived from ancient organic matter.
What are the consequences of burning fossil fuels in the environment?
It releases carbon dioxide, and too much carbon dioxide pollutes the earth.
This pollution contributes to climate change.
What is an example of a greenhouse gas?
Carbon dioxide
Greenhouse gases trap heat in the atmosphere.
What is the relationship between carbon dioxide concentrations and global warming?
When carbon dioxide amounts get too large, they heat up the earth, causing global warming and climate change.
This relationship is critical in climate science.
Which are the effects of global warming?
- Higher temperatures
- Melting glaciers and ice caps
- Severe droughts and storms
These effects have significant implications for ecosystems and human societies.
What are biofuels? What kind of energy source is it?
Biofuels are any living biomass that we convert into fuels. It is renewable energy.
Biofuels are considered a sustainable alternative to fossil fuels.
Explain how hydroelectricity works. What are its limitations?
Water is used to create energy, but it has limitations by location.
Hydroelectricity relies on geographical features like rivers.
How are wind turbines used as a renewable source of energy? What are its limitations?
Wind can’t be used up, but if the wind isn’t blowing, energy isn’t being created.
Wind energy is variable and depends on weather conditions.
What is geothermal energy?
The natural heat of the earth.
Geothermal energy is harnessed from the earth’s internal heat.
How is solar energy obtained and transformed into electricity? What is its limitation?
Obtained by solar panels with photovoltaic cells that convert solar energy into electricity. It is very expensive to manufacture.
The cost of solar technology can be a barrier to widespread adoption.
