WGU C451/GNC2/1NC1

Explain the concept of natural selection. - It is a process where organisms with advantageous traits leave more offspring than organisms with other traits - causing populations to change over time. (key mechanism of evolution) variation - traits vary from individual to individual heritable traits - A trait that can be passed on genetically from parent to offspring. fitness - the number of offspring an organism leaves over its lifetime compared to other individuals in the population Descri...

Define convection current. - Circular currents in the mantle caused by the magma being heated by the core off the Earth. Explain how convection cells cause local winds - Local winds are the result of convection on a small scale. They occur when Earth's surface is heated unevenly. For example, you've probably noticed that large bodies of water, such as lakes and oceans, are often much cooler than the nearby land surfaces during the day. The air above the warm surface absorbs heat from the ...

Describe the difference between a pure substance and a mixture. - Pure Substance is an element or a compound; a substance with a fixed chemical composition. Mixture is a combination of two or more pure substances. Examples of Pure Substance - Gold - Au Diamond (Carbon) - C Water - H₂0 Methane - CH₄ Examples of Mixtures - Ocean Water Air Rock Alloy Fabric Differentiate between a heterogeneous and homogeneous mixture - Heterogeneous mixtureComponents unevenly distributed Homogeneous mixtu...