At the end of the Cretaceous, a mass extinction event caused the dinosaurs to go extinct. Many scientists cite the impact of a large asteroid as the cause, but mounting evidence suggests that rapid climate change was already having a devastating effect on late Cretaceous ecosystems. What factors control climate in modern times?     All of these are correct     Thermohaline circulation and ocean currents     Convection in the atmosphere     Changes in the Earth’s orbital mechanics     Amount of greenhouse gasses in the atmosphere

Q: Calculate the expected lifespan of a 16 solar mass star.

A:   The life expectancy of sun or one solar mass is 1010 years. The relation between life expectancy T...

Q: You see two neighboring regions on a planet. One has many impact craters, and the other is character...

A: Craters are roughly bowl-shaped depression on the surface of planets, satellites, or any other celes...

Q: Where does all new ocean crust form? Why?

A: The crust, and therefore, the sediment that makes up the ocean floor is constantly formed and recycl...

Q: Living organisms and soil relationships...

A: Soil aggregation is a process in which combined action of cohesion and fragmentation process occurs....

Q: Earth formed in a swirling disk of matter surrounding the sun. As particles in the disk collided and...

A:   Gravitational collapse and accretion of primordial gas and dust cloud gave birth to the Solar Syst...

Q: Please do a, b, and c. (Answers are located on the bottom. Please show me the work.) Answers: a)8.30...

A: The quantitative measurement of the size of an earthquake is known as magnitude, it calculates the r...

Q: What are the positive and negative impacts of fracking? Should fracking be banned? How should we dis...

A:   Fracking is a process through which rocks are fractured by a high-speed liquid pumped through a ho...

Q: Limestone caves can develop when limestone rock is weathered. The weathering of the rock leaves an e...

A: Which of following explains how the limestone got weathered?a) Animals have burrowed through the lim...

Q: Summarize the main reservoirs and how elements move among these reservoirs for the Carbon, Nitrogen,...

A: The movement of an element or a compound like water among its various biotic and abiotic components ...

Q: Charcoal from an ancient campfire has a ratio of 14C to 12C that is one-fourth that of new wood. Abo...

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Q: The next problems refer to the following topographical map of a local region. This is essentially a ...

A: Answer 1: A) 80

Q: I’m completely lost

A:   The seismic P and S waves start from the focus or hypocenter of an earthquake at the same time. Si...

Q: what are the most abundant sediment size deposits at Fort Lauderdale, FL Beach?A. Gravel B. Sand C. ...

A: Fort Lauderdale is known for its white sand beaches with clear sky blue waters.  

Q: Sinking air warms, yet thunderstorm downdrafts are usually old. Why?

A: The term downdraft is utilized to portray the downpour and the cool air that starts to descend from ...

Q: a3 = P2 Kepler's third law a in units of A.U.s (1 AU = average Earth-Sun distance = 149,600,000 km...

A: According to Kepler's third law, the square of the orbital period of a planet is proportional to the...

Q: What are sediments? How are sediments formed?

A: A rock represents a solid mass which is made up of an accumulation of minerals and other substances....

Q: Which of the following is most likely to cause primary succession? a glacier covering a valley and m...

A:   Succession is progressive changes in the composition of an ecological community with time. In prim...

Q: Scientists plan to place detection devices outside Earth's atmosphere to detect radiations from a st...

A:   The atmosphere of earth blocks most of the light in the microwave band, so astronomers use satelli...

Q: nterior of the Earth- Name each of the following features: 1. 2, Ocean 2. 3. 3. 4. 5. 4. 6. Shade th...

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Q: Once fusion stops in the core of a star, the core is primarily supported against gravitational colla...

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Q: 7

A: For a bimetal material made up of element A and element B, the amount of element A can by calculated...

Q: What particle or nucleus does NOT occur in the hydrogen (proton-proton) fusion reaction sequence?

A: Proton- proton fusion reaction sequence (p-p chain) It is a nuclear fusion reaction in which hydroge...

Q: Sequence the statements below to show the order in which the information was presented in the passag...

A:   1. The definition of biotic factors is given. 2. Examples of biotic factors are given. 3. Interact...

Q: Acid deposition results from burning fossil fuels that release ___________ that react in the atmosph...

A: Acid rain occurs when some harmful gases react with water vapor. Acid rainaffects the monuments like...

Q: What federal agency is responsible for coducting environemental and human health risk assessments?

A: The special organizations of government-organized for any special or important purpose are known as ...

Q: \Identify any unique characteristics of your map (for example contour lines are unique to topographi...

A: This map is a classification map that splits the state of Ohio into various parts, where each part o...

Q: T2 2.) The forces on the Moon are the gravitational force from the Earth and the centripetal force f...

A:   The centripetal force acts towards its center and causes the object to move in a circular path.   ...

Q: As you approach a 10 solar mass black hole, you and your spacecraft are torn apart.  And you die.  W...

A: Black Hole Black hole is a place in space where gravitational force is so strong that no object even...

Q: If a star is 30 parsecs away, what is its observed parallax shift?

A:   The star's distance and its parallax angle is related as d = 1/p where the distance d is measured ...

Q: What major factor determines the future of the universe? Why?

A: The total amount of matter, or mean density contained within the universe is the major factor that d...

Q: In this lab the student will make use of Wien's Law and the Stellar radius formula to calculate the ...

A: Step 1: Calculate the temperature of the star relative to the Sun TstarSun =  2.98 x 106 (nm.K)λmax ...

Q: At its closest approach, the moon is 384 400 km from Earth. How many minutes would it take to send a...

A: The distance (d) is related to time (t) and speed (s) as d = s x t If the distance and speed are kno...