Five Facts, Ten Words
When and why did CO2 levels start rising?
-The 1700s/Industrial Revolution
-People started burning fossil fuels like coal, oil, and natural gas for new manufacturing processes
When you turn on a radio, what type of energy transformation takes place?
Electrical energy to sound energy
What is the formula to find KE?
KE= .5 x mass x velocity2
What is a solute?
When we mix things together, sometimes one thing dissolves in another. The thing that dissolves is called the solute.
Tell me at least 2 facts about recycling wastewater.
-There is some public distrust
-The water meets the same cleanliness standards as other water
- It involves many stages, including the use of bacteria to clean the water
What is the most important greenhouse gas?
Oxygen gas
This is energy that is not moving. It is energy that is not causing any changes now.
Potential
What is the formula to find GPE?
mass x gravity x height
What is a solvent?
The liquid that does the dissolving is called the solvent.
What has more GPe: a school bus at the top of a 30 meter hill or a small car at the top of a 30 meter hill?
The school bus at the top of a 30 meter hill
What is happening to the CO2 levels in our atmosphere?
These levels are rising
When a firecracker explodes, stored chemical energy turns into sound and light energy.What other type of energy is also released during this transformation?
Thermal
You throw a baseball with a mass of 0.6 Kg. The ball leaves your hand with a speed of 1.8 m/s. The ball has KINETIC energy. Calculate it.
KE = 0.5 x 0.6 kg X 1.8m/s x 1.8m/s = 0.972 Joules
What is a solution?
When the solute and solvent are mixed together, they form a solution.
What energy transformation is used in solar panels?
Light to electrical
What do greenhouse gases act like?
A blanket trapping heat around the planet
Potential energy is sometimes called ____ energy.
stored
A wagon is sitting at the top of a hill that is 17 m high. The wagin and its contents have a mass of 8 Kg. The wagon has POTENTIAL energy. Calculate it.
PE = 8 kg X 9.8 m/s2 X17m = 1332.8 Joules
What does is a concentration?
When a distance vs. time graph is flat, what does it mean?
It means that whoever/whatever is not moving/resting
What are some effects of increased temperatures on Earth?
-Increased evaporation of moisture from the Earth's surface
- More water is available for big rain/snow events
-Droughts
-Extreme weather events
A castaway on an island rubs two sticks together to create a fire. Which forms of energy are involved?
Chemical, thermal, mechanical
A car is traveling with a velocity of 22 m/s and has a mass of 867 Kg. The car has KINETIC energy. Calculate it.
KE = 0.5 X 867 kg X 22 m/s X 22 m/s = 209,814 Joules
I am making lemonade. If I mix lemonade powder into water, what is the solute, solvent, and solution?
Solute: sugar
Solvent: water
Solution: lemonade
If there is a 40 kg person moving 1 m/s and a 20 kg person moving at 6 m/s, which has more KE?
The 20 kg person moving at 6 m/s