Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Changing Earth
| Question | Answer |
|---|---|
| Conditions Needed For Fossil Formation | plentiful sediment quick burial hard body parts (teeth, bones, shells) |
| Enemies of Fossilization | scavengers fungi bacteria oxygen sunlight weather |
| Catastrophism | idea that conditions and organisms on Earth change in quick , violent events |
| Uniformitarianism | states that geologic processes that occur today are similar to those that have occurred in the past |
| stratigraphy | the branch of geology that studies the order and relative age of rock/soil layers on Earth. |
| law of superposition | states that the youngest layers of Earth are located on the surface and as you go deeper into the Earth, the layers get older. |
| relative age | is a way of describing how old something is not by using numbers but by using a comparison. |
| index fossil | fossil of an organism that was alive for only a short period of time, were abundant and widespread geographically; scientists can use these to assign dates to rock layers |
| absolute age | the numerical age in years of an object |
| radiometric dating | process to determine absolute age of an object isotopes break down into other isotopes and particles |
| half-life | time it takes for half the atoms of an isotope to decay |
| Limitations of Radiometric Dating | Radiometric dating does not work on sedimentary rocks. Carbon dating only works on organic matter. Carbon dating becomes inaccurate and then impossible after about 50, 000 years old Radiometric dating requires a piece of the object to be destroyed, so |
| What Can Tree Rings Tell Us | age of the tree past weather Diseases, pests of the time Volcanic eruptions, wildfires used to verify other evidence |
| What Ice Cores Tell Us | past temperatures past precipitation past atmospheric composition past CO2 levels past weather patterns used to verify other records |
| What Otzi Taught Us | Tech was more advanced than previously thought Otzi had tattoos, ate farmed veggies, also hunted Heart disease and lyme disease were around thousands of years ago |
| Energy | the ability to cause change |
| Work | the transfer of energy that occurs when a force is applied over a distance (force x distance) |
| Power | the rate at which work is done (energy/time) |
| Types of Energy | Mechanical Energy Sound Energy Thermal Energy Electric Energy Radiant Energy Nuclear Energy Kinetic Energy Potential Energy |
| Renewable resource | an energy resource that is replaced as fast as, or faster than, it is used. |
| Nonrenewable resource | an energy source that is available in limited amounts or that is used faster than it is replaced. |
| Fossil Fuels | Natural gas, oil and coal are fossil fuels. Fossil fuels are made from the remains of plants and animals that died before the dinosaurs. Since they take millions of years to form, they are a nonrenewable resource. They provide a tremendous amount of en |
| Fossil Fuels pro | We have the technology now and it works Many economies are based on fossil fuels Fossil fuels are currently cheap and provide all the energy we need...for now |
| Fossil Fuels con | Nonrenewable Harmful emissions Drilling and mining of fossil fuels can be harmful Transporting fossil fuels can be very harmful (leaks) |
| combustion power plant | combustion power plant - burns biomass or fossil fuels to create energy that is used to make steam which turns a generator, making electricity Example Fuels: coal, natural gas, wood, peat, trash |
| Coal Power:pro | relatively inexpensive low investment to mine and build plants abundant supply very energy rich, provides continuous power already using it globally |
| Coal Power:con | nonrenewable strip mining burning coal produces carbon dioxide coal ash (water pollution) coal smoke contains mercury and chemicals that cause acid rain |
| The Problem With Combustion Energy | Combustion energy is the burning of any fuel (coal, gas, wood, etc) The burning of fossil fuels can create smog and acid rain. The burning of ANY fuel creates carbon dioxide. Gasses like carbon dioxide trap heat in our atmosphere and lead to global war |
| Nuclear Power:pro | Practically no carbon emissions Low operating costs Can be used to recycle nuclear weapons Makes more electricity than any other plant Will only get more effective and safe |
| Nuclear Power:con | Expensive to build Nuclear disasters are devastating, but rare Target for terrorists Nonrenewable Mining nuclear fuel is dangerous to the environment Nuclear waste remains radioactive for up to 500,000 years |
| Disease | abnormal condition, a disorder of a structure or function, that affects part or all of an organism. |
Created by:
21armccall
Popular Economics sets