A type II supernova   a. occurs when a white dwarf’s mass exceeds the Chandrasekhar limit.   b. is the result of a helium flash.   c. is characterized by a spectrum that shows hydrogen lines.   d. occurs when the iron core of a massive star collapses.   e. c and d

Q: We started with 80mm of soil in the mason Jar.  In some cases, after seperation of the sand, silt an...

A: Soil is the uppermost layer of the Earth. It comprises various inorganic materials, organic material...

Q: What features of coral reefs help explainwhy they are so biologically diverse?

A: The Earth is made up of four spheres known as lithosphere, atmosphere, hydrosphere, and biosphere. A...

Q: Which best describes the percentage of stars that are in binary systems?   a. less than 10 perce...

A: The answer will be option d i.e. greater than 90%.

Q: Eventually, sediment will be transported to the ocean. By this point, it is very fine-grained, and m...

A: Firstly, let us discuss something about sedimentary rocks, Sedimentary rocks: Types of rocks that ar...

Q: Identify the fire class and the type of extinguisher appropriate for each fire situation. (a) Chemic...

A: Fire class is a system which categorising fire, which is based on type of material and fuel used for...

Q: Could you answer each four sections on the photo

A: Earth science is the study of the Earth and the various processes that are going on in the Earth sys...

Q: Stars that contract the slowest to land on the zero-age main sequence line on the H–R diagram   a...

A: H-R diagram or Hertzsprung–Russell diagram is a plot of stars. It has been plotted between stars' lu...

Q: Earthquakesa. If an earthquake has an intensity of 1000 times I0,what is the magnitude of the earthq...

A: Earthquake is violent shaking of the ground. This is caused by energy released by the lithosphere wh...

Q: Why is atmospheric circulation between the two hemispheres centered about the meteorological equator...

A: The rotation of the atmosphere is longitudinal and lateral air movements, forming cycles of various ...

Q: A light curve measures   a. brightness vs. distance.   b. mass vs. luminosity.   c. brig...

A: The answer will be option c i.e. brightness vs. time. 

Q: The extinction of starlight as a result of the interstellar medium   I. is the greatest in the ultra...

A: The medium that exists between the space and star system in the galaxy is called interstellar. The m...

Q: Word Definition weather climate

A: Meteorology is a branch of atmospheric science which uses chemistry and atmospheric physic to study ...

Q: What happens in convergence zones? How is caballing associated with convergence zones?

A: A convergence zone is a location where ocean water blends. They typically form at the confluence of ...

Q: Explain how the theory of plate tectonics account for the changes in landform areas over geologic ti...

A: Firstly, let us discuss something about what exactly is plate tectonics? Plate tectonics: The theory...

Q: What would happen if the sun stopped generating energy?

A: The solar system is a gravitationally bound system around the sun. It has 8 planets, their moons, as...

Q: What are the three general categories of marine resources?

A: Marine resources are physical and biological components found in seas and oceans that hold importanc...

Q: Describe some emergent properties of ecosystems.

A: The ecosystem is the combination of natural habitats including biotic and abiotic components of natu...

Q: How does water circulate from top to bottom and north to south in the Atlantic Ocean?

A: Earth is a terrestrial planet, meaning it has a rocky surface that is primarily consisted of silicat...

Q: The Crab nebula is   a. a planetary nebula.   b. a Bok globule.   c. an open cluster. ...

A: The term crab nebula can be at first immediately understood as a co-relation between universal conce...

Q: In what kind of environment was this rock likely deposited? And What is the sedimentary structure?  ...

A: The given rock is light brown in color with luster and layering seen in its texture. Sedimentary roc...

Q: Which of the following stars is least dense?   a. a supergiant star   b. a main-sequence sta...

A: Among the above options a supergiant star is least dense.

Q: What is climax community ?

A: Climates of particular regions determine their plant and animal communities that can able to survive...

Q: Why is plastic so dangerous to marine organisms?

A: The ocean is home to a variety of organisms. The increasing use of plastic and plastic pollution in ...

Q: ____________________ rock forms from the crystallization of a melt.

A: The rocks those that are formed by the process of crystal development and the removal or separation ...

Q: In the H–R diagram, 90 percent of all stars are   a. in the giant region.   b. in the superg...

A: The H-R diagram is also known as the Hertzsprung-Russell diagram. For the study of stellar evolution...

Q: Please answer the question in the photo

A: Earth science is the study of the Earth and the various processes that are going on in the Earth sys...

Q: Thinking Analytically How much wider has Iceland become because of seafloor spreading since the last...

A: The formation of Iceland began about 60 million years ago when the boundary between the Atlantic (th...

Q: Interstellar dust makes up what percentage of the mass of the interstellar medium?   a. 1%   ...

A: Interstellar medium is matter and radiation that exist in between stars in galaxy . This include gas...

Q: What can you say about our Planet today? Introduction, Body and Conclusion

A: The planet is an astronomical body possessing its own mass which accounts for the virtue of its grav...

Q: How can you tell which star is hotter by looking at an eclipsing binary light curve?

A: Firstly, let us discuss something about the star, Star: An astronomical object which consists of a l...

Q: Of a tropical cyclone’s three most dangerous properties (wind, rain, storm surge), which of Katrina’...

A: Tropical storms are also called tropical cyclones. Cyclones are called differently, depending on the...

Q: How does glacial ice in Greenland that is thousands of years old provide a record of climatic change...

A: Climate is the long term average of the weather pattern. Paleoclimatology is the study of climate fr...

Q: How the grain-size distribution of coarse-grained soil is determined ?

A: Soil is the uppermost layer of Earth, which is a mixture of minerals, organic matter, gas, water, et...

Q: In 1970 the deer population of an island forest reserve about 518 square kilometers in size was abou...

A: The population is defined as a distinct group of individuals. It can signify the people of a nation ...

Q: Thinking Analytically How much heat is required to melt a quart of ice resting at 0°C?

A: Water is the only substance on the earth that exists in all three states of matter, i.e., ice, liqui...

Q: Define water scarcity and water stress.

A: Earth is a terrestrial planet. This means it has a rocky surface primarily made up of silicate rocks...

Q: 1. What are the major greenhouse gases? What is the total emission measured in metric tons? Which ga...

A: since you asked multiple questions, only the first three were answered. Please select the question t...

Q: The carbon-nitrogen-oxygen cycle   a. operates at a slightly lower temperature than the proton–p...

A: Firstly let us discuss something related to the  cycle,  CNO cycle: a catalytic cycle resulting in t...

Q: Porosity decreases Choose one: A. with decreasing compaction of sediments or rock. B. when rocks dev...

A: Porosity of soil is the amount of empty spaces in the soil or rock it also the volume of void with r...

Q: Which features of carbonate rocks suggest intertidal or supratidal deposition? Which features sugges...

A: The deposition of sediments can occur in normal and high tide conditions. The sediments deposited in...

Q: Explain what solar wind is and how its related to the formation of Aurora Borealis. Draw a diagram t...

A: A natural electrical phenomenon portrayed by the presence of decorations of rosy or greenish light i...

Q: Is Earth’s magnetic field a constant? That is, would a compass needle always point north?

A: On the basis of rheology, Earth can be subdivided into lithosphere, asthenosphere, mesosphere, fluid...

Q: I read that there was a second earthquake near Sumatra on 28 March 2005. It measured 8.7—nearly the ...

A: The surface of the earth is divided into about a dozen large pieces, called tectonic plates that mov...

Q: Why do extremely cool stars look fainter than you might expect with their luminosities and distances...

A: Firstly, let us discuss something about cool stars and luminosities, Cool stars: The temperature ran...

Q: The Great Nebula in Orion   a. is a Herbig–Haro object.   b. is a reflection nebula.   c....

A: Orion Nebula is located in Milky way. This is also known as Great Nebula in Orion.

Q: What are the important health and safety rules at surface mines ? Please write down the rules one by...

A:  Mine Safety is a concept that aims to the safety of every mine worker. It is the practice of mitiga...

Q: Stars with masses less than __________________________ produce most of their energy via the proton–p...

A: Stars radiate their energy through radiation. The source for this energy is the fusion reaction of H...

Q: What factors influence the breaking of a wind wave?

A: Waves are formed by energy passing through water. They are generated by the wind blowing over the se...

Q: How might volcanic activity shape a coast?

A: A volcano is a feature of the earth's crust where molten rock is released from the earth's surface. ...

Q: WHAT DO YOU NOTICE IN THE TRENDS BELOW?

A: The arctic region is a polar region, situated in the northern hemisphere.  The region consists of se...