What covers 70% of the Earth, but people can only drink a small portion of it. Why?
Over 97% of the Earth's water is in the oceans, and it is too salty to drink.
100
Name 2 modes of transportation that are environmentally friendly.
Biking
Walking
Running
etc.
100
What percentage of mammals are currently in danger of extinction- 10%, 25%, or 35%?
25% of all mammals are currently in danger of extinction mainly because their habitats are being destroyed.
100
What animal emits enough methane gas to contribute to 16% of the total amount of climate change gasses in the atmosphere?
Cows flatulence and belches contain methane a dangerous, invisible green house gas.
100
What source of clean energy is powerful enough to take the place of every fossil fuel in every way it is used?
The sun produces enough energy to supply the entire world's energy demands.
200
True or False: when you flush the toilet, you use as much water as the average person in a developing country uses in a day.
True. The USA uses more water than any other country in the world.
200
Which of the following cars are most fuel efficient-
SUVs, Sport Cars, or Hybrid Cars?
Hybrid Cars use gasoline and electricity to run, and they are the most efficient cars on the market.
200
If everyone on the Earth lived like an American, how many planet Earths would we need to provide an adequate supply of natural resources in order to sustain humans- 1 Earth, 5 Earths, 10 Earths?
We would need 5 planet Earths to sustain us.
200
Which major ecosystem was reduced by 94 million hectares (bigger than the size of Colorado) during the 90's?
The Earth's forests especially rain forests are cleared to make room for farms and cow pastures.
200
Each year 3.4 million people die because of contamination of which major resource?
Fresh drinking water
300
What causes climate change?
Climate change is a theory backed by scientists that suggests that the Earth is getting warmer due to humans burning fossil fuels like coal and oil.
300
What is the most efficient mode of travel possible for people-
riding a bike, walking, driving a car, riding in an airplane?
Riding a bike is the most efficient way to travel even more than walking because you can travel farther with less energy.
300
What does it mean to live in a sustainable world?
In a sustainable world we would not use more resources than are available to us, or at a faster rate than they can be replenished.
300
What are the 3 Rs that help you to remember to use fewer resources and cut down on the amount of waste we produce?
Reduce, Reuse, and Recycle.
300
What is an environmental drawback for each of the following?
Computers
Wind Mills
Computers-use heavy metals, electricity, and are hard to recycle
Wind Mills-are a clean energy source, but they are noisy, unsightly, and inadvertently kill birds
400
How much does the average American spend on energy bills
$600 $1000 or $1400 a year?
The average American family spends $1400 a year; half of it on heating and cooling.
400
On average, do cars made today or those made in 1920s burn more gasoline?
Today's cars consume more fuel. Cars in the 21st century are the most inefficient in history.
400
Where do fossil fuels like coal and oil come from.
Fossil fuels like coal and oil are the fossilized remains of plants and animals from millions of years ago.
400
How many gallons of water are used to produce one pound of beef-100 gallons, 1000 gallons, or 2500 gallons?
Over 2,500 gallons of water are needed to produce one pound of beef. Cattle graze on land that needs to be watered, this makes the amount so high.
400
Fuel cells use which element-hydrogen, helium, or nitrogen?
Fuel cells use hydrogen. Hydrogen is the most abundant element in the universe.
500
Where are the world's greatest oil resources?
The bulk of the world's oil reserves are in the Middle East. This means the USA must import these fuels from a long way away.
500
As gasoline is converted to energy in cars, how much of it's potential energy is used?
100%
25%
10%
50 %
Only 10 percent!
500
How does every breath contribute to a balanced and sustainable ecosystem?
Humans breath out carbon dioxide and plants use that to make food during photosynthesis. During that process plants produce oxygen which humans breath in to stay alive.
500
Give 3 reasons why forests are crucial for maintaining life on Earth.
1. Forests are the home of many animals, without forests they could become extinct.
2. The roots of trees prevent flooding and soil erosion.
3. Trees remove carbon dioxide from the atmosphere helping to prevent climate change.
500
If we burn hydrogen in a fuel cell, it combines with oxygen to create energy. What is the by-product from this chemical reaction?
When hydrogen combines with oxygen the by-product is H2O or water.