Climate change Flashcards
Who is Ian Plimer?
He is a professor of Earth Science & he denies climate change.
What is a glacial?
The very cold time periods.
What is the interglacial?
The time period between the glacial.
What is the Quaternary period?
The Quaternary period is the third and last of the three periods of the Cenozoic Era. The Quaternary period began 2.58 million years ago.
What are the Milankovitch cycles?
It is the eccentricity change, the obliquity change & the precision change.
What is eccentricity change?
Eccentricity measures how much the shape of Earth’s orbit departs from a perfect circle. These variations affect the distance between Earth and the Sun (It takes about 100,000 years (approx)).
What is the obliquity change?
The obliquity change is when the Earth tilts more & less on it’s axis.
What is the precision change?
The precision change is when the spinning Earth wobbles a bit, rather than spinning smoothly it affects places near the north pole the most.
What are sun spots?
These dark area on the sun’s surface, that are much colder than the sun.
How do volcanic eruptions effect climate change?
1816 - the year without summer
- The eruption of mount Tambora.
- Ash spreads around the world and reflects sunlight.
- Summer is now winter.
- Crops died only a few could grow.
- only the rich could afford the food.
- World hunger
Who is Al Gore?
Al gore used to be a climate change denier. After a few years he changed and beacame a climate change actvist and gave a famous lecture called the ‘ An Inconvenient Truth’ (2006).
Name 3 greenhouse gases.
CO2, methane, nitrous oxide.
Name 3 ways humans have increased the CO2.
Deforestation, agriculture burning fossil fuels.
How is glaciers melting affecting the CO2 levels?
Glaciers have built over a very long time, in doing so it has trapped methane bubbles in the ice. Methane is a very powerful green house gas. So when the ice melts it will also release the methane which will drastically increase the CO2 levels.
Name a few ways we can reduce the CO2 levels?
Alternative energy production, carbon capture & planting trees.
