What were the major geologic event in the Pliocene?
One of the major geologic events during the Pliocene Epoch was the joining of the North American and South American tectonic plates. This joining formed the Isthmus of Panama separating the Atlantic and Pacific Oceans. This affected both land animals and marine life.
What mineral is valued for beauty and rarity?
Rubies, sapphires and diamonds are valuable minerals because they are rare and the cut prices reflect it.
What are some examples of eubacteria?
Some examples of eubacteria include Escherichia coli (E. coli), Bacillus subtilis, and Streptococcus pyogenes. These bacteria are common and can be found in various environments, including the human body and soil.
What are the three main groups of seedless vascular plants?
Here are a few:
Seedless Non vascular Plants:
Bryophytes:
Mosses
Liverworts
Hornworts
Seedless Vascular Plants:
Lycophytes
Club Mosses
Spike Mosses
Quil Mosses
Pterophytes
Ferns
Whisk Ferns
Horsetails
What was the climate during the silurian period?
During the middle silurian the climate was much warmer, it was though of as a period where the climate became more stable, ending the previous pattern of random climatic fluctuations. A new greenhouse phase began, leading to a rise in global sea level form ice melt. However, in coastal areas where there was warm shallow waters, the conditions led to large evaporite deposits, although this was largely exclusive to equatorial regions. In this instance, plants that had lived in water had to adapt to life on land or die off.
What statement best describes why the Cambrian explosion was important?
The Cambrian explosion was important because it marked a rapid diversification of life forms, leading to the development of most major animal groups seen today. It provides critical insights into the evolution and development of complex life on Earth.
What chemical and molecular effect does sugar have on water?
Sugar when added to water makes water sweeter.It is harmful for diabetics and helpful to their heirs.
Sugar crystals interact with water via hydrogen bonds- weak bonds that take place primarily between positively-charged hydrogen atoms and negatively-charged oxygen atoms. The two substances interact freely when combined. Water molecules surround individual molecules of sugar, breaking the bonds between sugar particles until the crystals are either fully dissolved, or until there are no 'free' water molecules left. When this occurs, the sugar crystals do not fully dissolve. Hydrogen bonds are so weak that they are constantly breaking and reforming, causing individual molecules to exchange positions. Because energy is required to break and form bonds, and heat is a form of energy, the warmer the water, the more readily the sugar dissolves.
Water with sugar in it has lower freezing and higher boiling points than pure water.
Are there fossils of partially-evolved species?
What do you mean by "partially evolved"? Since evolution is an ongoing process, any existing species will always be in a state of change. If you're referring to intermediate forms, some of the best examples to have been found in recent years are various fossils that show characteristics of both dinosaurs (scales, teeth, claws on all 4 appendages) and birds (beaks and feathers). Check out a site such as www.NewScientist.com for articles that are understandable without needing a graduate degree in paleontology.
What was the climate in the Mississippian period?
During the Mississippian period, the climate was warm and humid, characterized by high levels of carbon dioxide in the atmosphere. This led to extensive swamp and wetland habitats. Glaciers were absent and the planet was much warmer than today.
How long ago was the Devonian Period?
The Devonian Period lasted from about 395 to 345 million years ago. It is part of the Paleozoic Era.
Are mammal fossils found in rock?
Yes, mammal fossils can be found in rocks. They are typically found in sedimentary rocks, such as limestone or shale, where the remains of ancient animals have been preserved over time. These fossils provide important insights into the evolution and history of mammals.
What are the roles of a paleontologist?
Paleontologists study fossils to learn about ancient life forms and ecosystems. They also analyze the fossil record to understand evolution and Earth's history. Additionally, they may work to reconstruct past environments and climates.
Why is the dinosaur extinction significant?
The dinosaur extinction is significant because it led to the demise of the dominant species on Earth at the time, paving the way for mammalian evolution and eventually the rise of humans. It also provides important insights into how environmental changes can impact ecosystems and drive mass extinctions.
How many times has the earth reversed it's magnetism in the last four million years?
The Earth's magnetic field has reversed its polarity several hundred times over the past 160 million years, with an average reversal rate of about once every 200,000 to 300,000 years. This means that in the last four million years, it may have reversed polarity around 20 times.
One kind of fossil forms from the body parts of organisms. What is another kind of fossil?
Another kind of fossil is a mold or cast fossil, which forms when an organism's remains decay and leave an impression in the surrounding sediment that is later filled with minerals. Another type is a trace fossil, which is evidence of an organism's activity, like footprints or burrows, preserved in rock.
No, the Mesozoic Era is not the first geological era. It is the era that followed the Paleozoic Era and preceded the Cenozoic Era in Earth's history. The Mesozoic Era is known for the age of the dinosaurs and lasted from about 252 million years ago to 66 million years ago.
What awards did Mary Leakey receive?
Mary Leakey received several awards, including the Gold Medal of the Society of Antiquaries in London, the Hubbard Medal of the National Geographic Society, and the Royal Anthropological Institute's Huxley Medal. She was also made a fellow of the Royal Society in 1964.
What is the period of time that began 2.5 million years ago with the first tools?
The period that began 2.5 million years ago with the first tools is known as the Paleolithic or Stone Age. This period is characterized by the use of simple stone tools by early human ancestors for hunting, gathering, and basic survival. It lasted until about 10,000 years ago when the Neolithic or Agricultural Revolution began.
How many forces operated in the universe during the GUT era?
During the Grand Unified Theory (GUT) era, there were three fundamental forces operating in the universe: the strong nuclear force, the weak nuclear force, and electromagnetism. These forces were unified into a single force at very high energies, as postulated by GUT theories.
What man in history asked the first question?
It is not possible to definitively determine who in history asked the very first question, as questioning likely dates back to the earliest human interactions. Philosophers such as Socrates are well-known for their use of questioning in philosophical dialogues, which played a significant role in the development of critical thinking.
What era occurred before the current era?
The current era is Cenozoic era. The preceding era was Mesozoic era.
However if you are looking for periods in Cenozoic era, the current one is Neogene period, the preceding period was paleogene period.
What condition in the past produced a mold fossil?
A mold fossil is formed when an organism decays and leaves an impression in the surrounding sediment or rock. Over time, the impression fills with minerals, creating a cast of the organism's shape.
What came first Paleozoic or mesozoic?
The Paleozoic Era of geologic history occurred before the Mesozoic Era.
Why pottery is most common finds on excavation site?
Pottery is non organic and as such it endures through time and can be easily found during excavations as intact vessels or pottery sherds
When did the Stuart era begin and end?
The Stuart era began in 1603 with the accession of King James I (James VI of Scotland) to the English throne and ended in 1714 with the death of Queen Anne.