Instant Expert: Fossils are not just bones and stonesAortic stenosisTranscatheter aortic valve implantationStrokeAtrial fibrillationFossilisation can include the preservation of organic material, such as body tissues, organs and skin. We look at sites that teem with such material...
1The scientists are digging for fossils (化石). Fossilized bones tell the story of dinosaurs, animals that were once living creatures and appeared on Earth some 225 million years ago. Dinosaurs dominated (主导) planet for 150 million years, much longer than people have existed.Dinosaurs came in...
Body fossils, or mineralized organisms — dinosaur bones and petrified wood and everything else like them— are the best-known kind of fossil. These can include even microbes and grains of pollen (microfossils, as opposed to macrofossils) where the conditions have been right. They make up most...
Why are fossils found in sedimentary rocks? Why do few fossils exist from the Precambrian? Why are there no fossilized worms? How are mold and cast fossils different? Why is absolute dating used on fossils? Why are trace fossils common? Why are dinosaurs' bones radioactive? Why do very few...
Answer to: The most likely place to find fossils are in a) volcanic rock. b) beach sand. c) the sap of ancient trees. d) sedimentary rock. By...
The seashells and fish bones were covered with soft mud and sand. The mud became hard. It turned to stone. The shapes of the shells and bones were pressed into the stones. These stones are called fossils. Fossils have been found all over our country. Have you ever found one? 1.Some ...
The word fossil comes from the Latin term fossilis, meaning "dug up." Fossils are formed when an organism is buried by water containing debris and minerals, and through the effects of wind or gravity. Most fossils are found in sedimentary rocks.
(i) Fossils are remains of hard parts of life forms in Rocks (ii) A study of fossils in different sedimentary layers indicates the geological period in which they live . (iii) Radio isotopen are often used to determine the age of the fossils ...
Stories about dinosaurs have existed for as long as people have been aware of the existence of trackways and fossils. Some researchers suggest that legends of behemoths and dragons come from the discovery of dinosaur bones and footprints [source: Sanz]. There are also cave paintings that appear...
Why are chronospecies only described from fossils? Why are sedimentary rocks called secondary rocks? Why is the deciduous forest biome called so? Why is Penguin Island called Penguin Island? How do dynamics differ from articulation? Why is the Brassicaceae family sometimes called mustard?