Science Flashcards
Abiotic
Non living
Biotic
Living
Troposphere
- lowest region of the atmosphere
- weather occurs here
- temperature increases with altitude
- absorbs infrared light
- air is mixed well
Stratosphere
- temperature increases with altitude
- ozone is present at 25km and absorbs deadly uv rays
Mesosphere
- temperature decreases with altitude
- 50km to 90km
- layer where meteors burn up
Thermosphere
- first layer exposed heat of the sun
- air is so thin that a small change in energy can cause a large temperature increase
- auroras occur here
Exosphere
Region where atoms/molecules escape into space. Upper limit of atmosphere
Apparent
A comparison between earth and stars
Absolute
A comparison between stars and stars
Doppler Effect
The wave frequency of of an object is faster when moving towards you than when moving away
Red Shift
Moving away
Blue shift
Moving
Light year
The distance light can travel in one year (10trillonkm)
Analogous Structure
Same purpose, different ancestor (butterfly and bat)
Homologous structure
Same structure, different function (human arm and bat wing)
Biodiversity
Factors that contribute to the selection variations, provides individuals with increased chance of survival over others
Evolution
Change over time
Species diversity
The number of different species within an ecosystem
Allele
Alternative forms of a gene for a certain characteristic
Meiosis
Parents cell results in four unique cells (haploid)
Speciation
Formation of a new species
Genetic drift
Changes due to events such as floods, fires
Selective agents
Different biotic and abiotic agents that influence survival
Population
Group of individuals, same species that can interbreed