Ib biology carbon dating
Both classes will cover the same 6 topics in the order listed below with the same subtopics listed below: As a part of the IB Biology class you cover an additional subject of your choosing from the list below (typically you don’t choose, but rather your teacher does). She graduated magna cum laude and scored in the 99th percentile on the ACT.
Whichever option you or your teacher chooses you will cover 3 or 4 topics (15 hours total) for SL and an additional 2 or 3 topics (25 hours total) for HL. Here are the activities: Are you hoping to squeeze in some extra IB classes? She is also passionate about acting, writing, and photography.
Reference fossils are the remnants of dead animals and plants that we know existed at a particular time in history.
Because of this, when we look at a rock-face, we know that the bottom layers are the oldest, and that fossils parallel to each other along the layers of sediment are likely to be from the same era.They're useful because they give us a more exact date for a rock, and they can be used to date more rocks since they're common.Ammonites are a great example of an especially useful index fossil.Ammonites changed over time, so that ones from a few million years apart are never quite the same. Other examples of good index fossils include tropites, which existed only from 230 to 208 million years ago, and trilobites, which are useful in the same way as ammonites -- due to the large number of variations over time, even though they existed for a full 270 million years.Tropites were similar to squid and octopus, except with a hard shell, and trilobites were a type of sea-based arthropod.