OCE1001 Pearsons Chapter 1
The explorer who advanced oceanography by introducing systematic soundings, or depth measurements, was __________.
James Cook
What is a nebula?
a large, diffuse cloud of dust and gas in space
The important contribution to navigation made by Eratosthenes in the third century BC was __________.
a reasonably accurate calculation of the circumference of our planet
A tentative, testable statement about the general nature of a phenomenon is called a/an:
hypothesis
Waters from which ocean basins combine to form the Southern Ocean?
- Pacific -Atlantic -Indian
Imagine that you are enjoying a day at the beach in California, exploring tide pools. You find a California sea hare in the shallow water and gently scoop it into your hand. As you touch it, the sea hare releases purple ink into your hand. You think maybe the sea hare released the ink to scare you (a potential predator) away, but you are not sure. What steps of the scientific method have you performed in your inquiry?
- hypothesis formation - observation
Of the following statements about density stratification, which is/are true? Choose all that apply.
-Density stratification has caused the highest-density material to be found at Earth's core. - Outgassing is a direct result of density stratification -The origin of Earth's oceans and atmosphere are a result of density stratification. - Density stratification has caused Earth's internal structure to be layered
Which of the following statements is/are true regarding Earth's core?
-Earth's core is composed of two layers that differ in physical properties. -The core is composed of mainly iron and nickel, with some sulfur. -The outer core is liquid because it is so hot.
Which of the following statements is/are true regarding Earth's oceans?
-Earths oceans are one big interconnected body of water -The southern ocean is one of the least-studied areas on planet earth -NASA satellites fly over Antartica
What elements are found in high concentrations in oceanic crust?
-Magnesium -Iron
Which of the following ideas support our current scientific understanding of the development of life on Earth? Choose all that apply.
-Primitive life likely existed without the need for oxygen. -Early organisms evolved into more-complex organisms over geologic time. -The "prebiotic soup" of the primitive oceans provided favorable conditions for life to develop. -As life evolved it significantly changed Earth's environment.
Which of the following statements is/are true regarding the scientific method?
-Scientific method is an ongoing cycle -Scientists make predictions based one established theories -The Scientific Method involves repeated testing and adjustments of hypotheses to explain observations
What elements are found in high concentrations in continental crust?
-Silica -Aluminum -Potassium
Examine the five words and/or phrases and determine the relationship among the majority of words/phrases. Choose the one option that does not fit the pattern. A) Christopher Columbus B) John Cabot C) Vasco de Gama D)Ptolemy E) Ferdinand Magellan
D) Ptolemy
The study of the structure of the sea floor and how the sea floor has changed through time is an example of ________ oceanography.
Geological
What happened to the nebular gas that remained from the formation of the planets and their satellites?
It was blown away by the solar wind.
differences between oceanic and continental crust
-continental crust is mainly composed of granite, whereas oceanic crust is mainly composed of basalt -Continental crust is thicket than oceanic crust -Continental crust floats higher on the mantle than oceanic crust
Imagine that you are enjoying a day at the beach in California, exploring tide pools. You find a California sea hare in the shallow water and gently scoop it into your hand. As you touch it, the sea hare releases purple ink into your hand. You think maybe the sea hare released the ink to scare you (a potential predator) away, but you are not sure. What is the next step you would need to take to advance your understanding to the next level of scientific inquiry?
-testing
When did the solar system begin to form?
5 billion years ago
Archeological evidence suggests that boat technology was developed about ________ years ago.
50,000
How did our solar system begin to form?
A large cloud of dust and gas began to contract under the force of gravity
Who left Spain in September 1519 and became the first person to complete a circumnavigation of the globe when he returned to Spain three years later?
Juan Sebastian del Caño
Which of the following is Earth's rigid layer that includes the crust plus the topmost portion of the mantle?
Lithosphere
Which of the following is the first step of the scientific method?
Observations
Which of the following is Earth's liquid iron-nickel layer?
Outer Core
Which of the following has the deepest waters?
Pacific Ocean
Which of the following is the largest natural geographic feature on Earth?
Pacific Ocean
The first recorded circumnavigation of Africa was made by the ________.
Phoenicians
The study of the transmission of light and sound in the oceans is an example of ________ oceanography.
Physical
The method of determining latitude in the Northern Hemisphere by measuring the angle between an observer's line of site to the North Star and line of site to the northern horizon was developed by:
Pytheas
a well-substantiated explanation that is supported by facts, tested hypotheses, and logical inferences
Scientific Theory
How do plants and animals gain the energy needed to carry out cellular functions?
They utilize the energy in sugar.
According to the Geologic Time Scale, which selection lists the correct order of coexistence, from earliest to latest?
Trilobites and amphibians, insects and dinosaurs, dinosaurs and birds, flowering plants and fishes, humans and reptiles
The nebular hypothesis suggests that:
all bodies in the solar system formed from an enormous gas cloud.
Isostatic adjustments are the result of the buoyancy of Earth's lithosphere as it floats on the ________ below which is denser and plastic like.
asthenosphere
What type of organisms utilize photosynthesis?
autotrophs phytoplankton primary producers
If you had an equally sized hand sample of each rock shown in the figure, which would feel the heaviest?
basalt or dark colored rock
According to the fossil record on Earth, the earliest-known life-forms lived in sea floor rocks about 3.5 ________ years ago.
billion
Earth's atmosphere became oxygen rich about 2.45 ________ years ago.
billion
Evidence suggests that the Sun and the rest of the solar system formed about five ________ years ago.
billion
One of the reasons that free oxygen in our atmosphere is important to the development and maintenance of life on Earth is because oxygen:
can form ozone and block some UV radiation.
Earth's early atmosphere most likely included:
carbon dioxide, water vapor, ammonia, and methane.
Although Earth's oceans have existed since early in the formation of the planet, its ________ must have changed.
chemical composition
In the figure above, which illustrates Earth's major layers. Which layer is represented by the letter B?
continental crust
The separation of the Earth into layers while it was molten was the result of the:
differing densities of the elements that make up the Earth.
The amount of time over which the number of parent isotopes decreases by half?
half-life
A cometary model of the formation of Earth's ocean must include the chemical difference between the ________ in comet ice and that in Earth's water.
hydrogen
In the figure above, which illustrates Earth's major layers. Which layer is represented by the letter C?
lithosphere
Rocks in which layer(s) of Earth are rigid?
lithosphere inner core mesosphere
What is the basis for relative positions of Earth's physical layers?
material density, with the least-dense material on the surface and the most-dense material in the center
Earth's second atmosphere formed from ________.
outgassing
What are the reaction products of photosynthesis?
oxygen gas and sugar
What does the term "asthenosphere" literally mean?
weak sphere
Earth's current atmosphere supports animal life because __________.
plant photosynthesis provides oxygen that is critical for aerobic respiration
Our world ocean can be divided into four principal oceans plus an additional ocean, based on the ________ of the ocean basins and the ________ of the continents
shape; position
As shown in this video, Silly Putty will flow when stress is applied __________ and Silly Putty will fracture when stress is applied __________.
slowly, rapidly
Current scientific knowledge indicates that the most likely origin of most of Earth's oceans was due to ________.
water vapor released from volcanic outgassing
The four principal ocean basins (plus an additional ocean) on Earth are the:
-Atlantic -Pacific -Arctic -Indian -Southern/Antarctic
Radioactive materials can sometimes be used to determine the:
Ages of rocks
Based on definition, it is more appropriate to consider which ocean as a sea?
Arctic
Oceanic crust is primarily:
Basalt
Which of the following parts of Polynesia was populated last?
Easter Island
The first person we are aware of who determined the circumference of the Earth using trigonometry and the angle of sunlight at Alexandria, Egypt, was:
Eratosthenes
Who is credited with being the first person to accurately determine Earth's circumference?
Eratosthenes
Who was killed in the Philippines during his last sea voyage after a skirmish with local people?
Ferdinand Magellan
What happens during radioactive decay?
Parent isotopes turn into daughter isotopes
Two containers hold the same radioactive isotope. Container A contains 1000 atoms, and container B contains 500 atoms. Which of the following statements about containers A and B is true?
The rate of decay of atoms in container A is greater than the rate of decay of atoms in container B
Plate tectonics and evolution, which are held with a high degree of confidence because of rigorous testing and verification, are examples of:
Theories
Who is credited with being the first European to see the Pacific Ocean?
Vasco Nunez de Balboa
A container holds 100 atoms of an isotope. This isotope has a half-life of 1.5 months. How many total atoms will be in the container after 3 months?
100 atoms (Atoms of radioactive isotopes turn into atoms of other isotopes)
A container holds 100 atoms of an isotope. This isotope has a half-life of 1.5 months. How many atoms of the radioactive isotope will be in the container after 3 months?
25 atoms
The average depth of the world's oceans is approximately ________.
3,681 meters (12,080 ft)
Earth is about:
4.6 billion years old
Which ocean is the shallowest in the world?
Arctic
Which ocean basin is currently covered by extensive sea ice for much of the year?
Arctic Ocean
What is the chemical formula for sugar?
C6H12O6
Trilobites were dominant during which geologic period?
Cambrian
Which rock figure is likely to be in high in iron and magnesium?
Dark colored igneous rocks, formed from dry lava
What common household item is used in this video to demonstrate the properties of the asthenosphere?
Silly Putty
How did the Moon form?
The Moon formed due to the impact of a Mars-sized body with the Earth.
Of the following statements about the asthenosphere, which is/are true? Choose all that apply.
The asthenosphere is very hot and contains areas of partially molten rock. The asthenosphere is a highly viscous layer located beneath the lithosphere.
What happened when Mr. Trujillo hit the Silly Putty with his hammer?
The material fractured like a solid.
Where did the energy of the sun come from originally?
thermal energy that was converted from the gravitational energy of the original nebula collapse
Compared to continental crust, oceanic crust is generally __________.
thinner, denser, darker in color, and at lower elevations
What are the reaction products of respiration?
water and carbon dioxide gas
