How much more iridium was found in the K–Pg boundary layer than in rock 0.5 m below it?   41.35 ppb   41.60 ppb   41.24 ppb   39.62 ppb

Q: what is the relative age of the igneous rock?

A: Igneous rocks, also known as magmatic rocks, are formed by the cooling and solidification of the…

Q: Which of the following is a type of coal? (Choose all that apply)   lignite   magnetite…

A: Coal is a sedimentary rock that is black or brownish-black in color and can be burned for fuel or…

Q: How is nuclear waste currently stored in Texas?

A: Texas usually bans the storage of highly radioactive water. But some parts of West Texas has got the…

Q: Why is the specific heat of water important to marine life?

A: Water covers around 70%of our earth surface. Water is very vital for survival any living organisms…

Q: Why is it important that the compost heap be turned frequently?

A: Introduction Soil ecosystem is an example of complex ecosystem as it contains a lot of living,…

Q: 2. a) Briefly describe the divisions of the Marine Environment.

A: An ecosystem is a natural community of living beings that deals with the external environment and…

Q: Explain the Alkali reserve ?

A: Alkali reserve is represented by Plasma bicarbonate . Bicarbonate concentration is significantly…

Q: Discuss the drastic environmental impacts of oil spills and how the microbes like bacteria can help…

A: Microbes are defined as tiny living or biotic things that are present all around us and are too…

Q: What could thwart microbial bioremediation of a sitethat contains buried nuclear weapons that are…

A: Bioremediation of radioactive waste is one of the most important applications of bioremediation.…

Q: Soil with 30% clay, 60% sand, and 10% silt is considered: Percent Silt 30 Clay 40 100 90 10 20 Ce 70…

A:

Q: What would you expect to find near a deep sea hydrothermal vent? O tube worms O crabs microbial mats…

A: Prokaryotes are the single celled organisms (unicellular) and are the simplest form, which do not…

Q: How to reduce/control the tin pollution??

A: Tin is a metal that is soft and pliable. It cannot be oxidized easily since it is covered by an…

Q: Identify two reasons there was concern about the 2014 Elk River Chemical Spill.

A: Water pollution is the polluting of streams, rivers, lakes, seas, or groundwater by pollutants…

Q: Which region emitted the greatest amount of total mercury? A.)Asia B.)South and Central America…

A: Mercury is a heavy metal that causes several adverse effects on the health of living organisms. It…

Q: 10.0. 0 M 0₁ 10.0. 0.0 ₂.0.0. 0. N B Using relative dating principles, what is the correct sequence…

A: Soil beds form in horizontal layers according to the principal of original horizontality. Soil gets…

Q: Natural pyritic deposits, such as underground coal seams, donot contribute to acid mine drainage;…

A: The pyrite or fool’s gold or iron pyrite is an iron disulfide mineral that occurs naturally. The…

Q: true or false  Sea level is higher during an ice age than an interglacial.

A: Interglacial period is that warm period which occurs in between the glacial (frozen period) periods.…

Q: 41. In general, bedrock cannot be found in ... O Costal sediments O Residual debris O Colluvial…

A: Bedrock is a hard, solid rock deposit beneath surface materials such as soil and gravel or other…

Q: Why does ozone hole form over Antarctica? How will enhanced ultravioletradiation affect us?

A: Ultraviolet is a sort of electromagnetic radiation, its wavelength ranges from 10 nm to 400 nm, less…

Q: What is the significant about the type of structure shown in the image? Select one alternative: O…

A: The image is that of a coral which is forund in the seas.

Q: Why would increasing energy efficiency in homes and businesses across the united states reduce the…

A: In United States, energy efficiency could be increased by  1. Turning thermostats down in winter and…

Q: Q. Explain The following 1- Scientific importance of the studying of geology? 2- Explain the aim of…

A: Note :- Since you have asked multiple questions im only answering the ist 3 as per bartleby…

Q: Why is the ozone layer vital to life on earth?

A: Ozone is a tri oxygen which is not stable and can undergo rapid dissociation. It is present as a…

Q: Explain the beneficial uses of radioisotopes.

A: Radioisotopes are radioactive isotopes of any element. We can also define them as atoms with…

Q: 1. What is the carbon cycle? 2. What causes a significant increase in CO2 in the Atmosphere? 3. Name…

A: Ans 1: Carbon Cycle is a biogeochemical cycle where various carbon compounds are interchanged among…

Q: What carbon compound is the least available for the majority of life forms and why is this the case?

A: Carbon is present in the environment in many forms yet most living forms are not easily accessible…

Q: original materials are organisms preserved in materials such as

A: Body fossils  In the basis of body remains body fossils are categorised into two groups  1.…

Q: A food consumer stored their food at 4 degree celsius without washing, hoping to preserve it for a…

A: Refrigeration doesn't kill the bacteria as such but makes their enzymes and metabolism inactive and…

Q: In lakes around the world, some have thick deposits of limestone, which is made up of calcium…

A: Smokestack scrubbers are a relatively new component to industrial exhaust systems. Scrubber systems…

Q: QC271. An aquifer has following different formations, their thickness and Hydraulic conductivity are…

A: Approach to solving the question: through using the data given. Detailed explanation:Ki*Hi…

Q: Do you think cleaning plastic from the gyre is worth the risk to marine life?  How do you collect…

A: Plastic is one of the major components responsible for polluting the marine ecosystem. Among the…

Q: TRUE OR FALSE            Radioactivity, electrical energy, heat ,and sound energy from the sun were…

A: Primitive forms of the earth's atmosphere included only a small concentration of free oxygen and was…

Q: What caused the development of banded iron formations?

A: The oxygen that is presently in the Earth's environment was not there in the starting. Early life…

Q: Why ozone hole forms over Antarctica? How will enhanced ultraviolet Radiations affect us?

A: The ozone hole is more noticeable over the region of Antarctica than anywhere else. It is formed as…

Q: How the water was saved in the kulhs?

A: Kulhs is a traditional irrigation system practiced in the hilly areas of Himachal Pradesh. Parts of…

Q: Researchers with the Canadian Forest Service placedidentical samples of organic material—litter—on…

A: temperature is an important factor for the decomposition of litter. the rise in mean annual…

Q: Describe two processes where carbon exists the atmosphere.

A: The carbon cycle is nature's method of reusing carbon molecules, which travel from the environment…

Q: Discuss the Lake Toba supervolcano eruption and its effects on the human population.

A: The Toba catastrophe theory states that a massive volcanic eruption changed human history by…

Q: Why is phosphorus important to living things

A:

Q: Is cleaning plastic from the gyre is worth the risk to marine life?  How do you collect small…

A: Plastic is one of the major components responsible for polluting the marine ecosystem. Among the…

Q: Give one difference between the IOllowing pairs, ) Mylonite: ) Conglomerate: -) Syncline: -)…

A: difference between the followings

Q: is the rate of seafloor spreading farly constant? how do you know

A: Seafloor spreads at the mid-oceanic ridge due to volcanic activity, as a result, divergent boundary…

Q: Besides mercury whichother heavy metals causetoxic pollution?

A: Pollution is the introduction of contaminants into the natural environment that causes adverse…

Q: 1. Calculate the mAs for the following exposures. (1 point each) a. 200 mA, 0.05 second - b. 300 mA,…

A: In radiography, the mAs (milliampere-seconds) is a measure of the total electrical charge used…

Q: The increase use of fossil fuels increases the Select one: O a. rate of photosynthesis of marine and…

A: Fossil fuels are the reserved fuels buried in the deep earth crust. The supply of fossil fuels is…