5. What is the difference between relative dating and absolute dating? Give an example of each. Relative dating – Rocks are placed in sequence/order of their age in years. Absolute dating – Radiometric dating to place an age on rocks or
He believed that all of the continents were once joined together, forming a super-continent called Pangaea. These plates are thought to float on the underlying semi-molten asthenosphere and are moved by convection currents that derive their heat from the earth's crust. It states that this process isi continous and forms new land along the boundaries where the plates move apart - known as constructive margins - and destroys older crust where the plates are moving together - destructive margins. Later evidence also supported this theory - fossilised remains of a dinosaur, the mesosaurus, were discovered on the coasts of Brazil and Gabon. Wegeners ideas were proved even further, increasing our knowledge of tectonic events.
Geologically, Aruba is more complex. The geological formation of Aruba’s geography is composed of three major rock groups; Igneous, metamorphic and sedimentary. To the reader who just looks at the textbook, this means that Aruba (the Island) was there long before the late 15th century when the Spanish first came here. Actually, Aruba was formed from the process of volcanism some 90-95 million years ago. The Island of Aruba is the result of lava hardening from a volcano that occurred almost 100 million years ago underwater.
When the source of hydrogen in the Universe is exhausted, all the stars will burn out and die. 3. The gravity of the Universe may become so great that it will bring all matter in the Universe back together and the Universe will collapses into black holes. 4. It is, therefore, true to say that everything that exists in the Universe is not permanent.
How many half-lives have passed since the crystal formed? A) 1 B) more than 1 but less than 2 C) more than 2 but less than 3 D) more than 3 Answer: B 4) Which of the following geologic observations would NOT bear directly on working out the sequence of geologic events in an area? A) inclusions of sandstone in a granite pluton B) a well-exposed dike of basalt in sandstone C) an unconformity between a granite and sandstone D) the feldspar and quartz contents of a granite Answer: D 5) The principle of ________ is the concept that ancient life forms evolved in a definite order and therefore their fossils can help determine the geologic ages of strata. A) superposition B) cross-cutting relationships C) fossil succession D) fossil assemblage Answer: C 6) Which of the following is an essential characteristic of an index fossil? A) The organism lived in a very specific environment or two, such as tropical volcanic islands.
The four largest of these were seen by Galileo when he made one of the first telescopes. The way they moved round the planet convinced him that the old idea, that everything moves round the Earth, must be wrong. The following was kindly contributed by Russell Odell The sun contains 99.9 percent of the mass in the solar system. The remaining 0.1 percent make up the other planets and their moons, and Jupiter took most of that mass. If Jupiter were a shell, all the other planets and their moons could fit inside with room to spare.
Name: Date: Period: 1. are natural or artificial bodies that revolve around more massive bodies such as planets. (Satellites or Comets) 2. Most lunar craters are the result of . (volcanoes or impacts) 3. The time it takes for Earth to around the sun is 1 year.
Frequent collapses of lava-dome complexes, most recently in 1964, have produced large debris avalanches whose deposits cover much of the floor of the breached caldera. During the 1990s, intermittent explosive eruptions took place from a new lava dome that began growing in 1980. The largest historical eruptions from Shiveluch occurred in 1854 and
This was not the case, in various videos and pictures from the landing, shadows are clearly seen in many different directions. 3. Van Allen radiation belt. En route to the moon the astronauts would have to travel through the Van Allen radiation belt. Theorists claim that the extremely high levels of radiation would have cooked the astronauts if they had gone through it.
This type of volcano can be recognized by its broad, gentle slopping shape. The lava dome that composes a shield volcano is usually built over a period of time. When this type of volcano erupts it often involves a flow after flow of lava. An example of shield volcano is Mauna Kea, which along with Mauna Loa forms the large island of Hawaii. The largest shield volcano in the solar system is Olympus Mons, on the planet mars.