What is the approximate main-sequence lifetime of an O star? 1,000,000 yr 10,000,000,000 yr 10,000 yr 100,000,000 yr 1000 yr O 0 0 0

Q: Is it possible to use ambient geothermalenergy in nonvolcanic regions? Why?

A: The energy resources available at present can be classified as renewable and nonrenewable. Renewable…

Q: 7. Sitting on the beach during the day you feel a breeze coming off the water.  What type of breeze…

A: Because the heating rates of land and water are uneven, sea breezes occur during hot summer days.

Q: Scientist concur on two things about climate. The world's climate is changing and human activity is…

A: By a large majority,climate scientists agree that average global temperature today is warmer than in…

Q: Does steepening the water table increase ordecrease the rate of groundwater flow?

A: Steepening the water table will increase rate of groundwater flow.

Q: Which component of the SPEAK Awareness of Environmental Science would you consider as the most…

A: Given that, which component of the SPEAK awareness of environmental science would you consider the…

Q: An aquifer is rock or sediment that has a. low permeability and low porosity. b. low permeability…

A: An aquifer is an underground body of porous rock or sediment which is saturated with groundwater.…

Q: Why is intact bedrock stronger than fractured bedrock? Why is itstronger than regolith?

A: Earth is a terrestrial planet, meaning it has a rocky and solid surface, which is primarily made up…

Q: Do you think it would make sense for an energy company to drillfor oil in a locality where beds of…

A: Yes, it would be okay to drill oil in anthracite beds occurring places.

Q: If one country restricts the export of a strategicmineral, would that change the minimum…

A: Mineral resources are both renewable and non-renewable. The mining of a particular non-renewable ore…

Q: the last planet forming process is.....?

A: There are four stages of formation of planetary bodies; 1. The gravitational collapse of star that…

Q: What steps could government and industries take to protect our aquatic resources? Cite ways on how…

A: Aquatic resources are the resources which includes wetlands, streams , rivers, ponds, ground water…

Q: Although about 70% of earth’s surface is covered in water, about how much of that water is…

A: Earth's surface is covered with around 70% of water out of which 97% of water is present in seas and…

Q: What can cause a drainage-reversal event totake place?

A: Onshore and offshore, drainage reversal can result in significant shifts in deposition and…

Q: What is definition of energy independence(security)?Does energy independence increases or decreases…

A: Energy independence or Energy Security can be defined as the potential or ability of a country to…

Q: Why did the Himalayas and the Alps form?

A: The mobile plate is the plate that divides the earth's lithosphere. The plates floating above the…

Q: Questions: Which of the following has the most heavily crated surface?  a.) Mercury  b.) Venus…

A: Our solar system has different types of planets, moons, and asteroid belts. Asteroid belts are…

Q: Which type of ore deposit does the figure show?

A: Naturally occurring materials from which one or more mineral, metal or metallic compounds can be…

Q: A The trade winds blow from Selected Answer. e east to west Answers: south to north north to south O…

A: Since we only answer upto 3 sub-parts we will answer the first 3. Please resubmit the question and…

Q: How will changes in air pressure and sea surface temperature associated with El Nino potentially…

A: solution

Q: Discuss environmental impacts on the water quality?

A: * The environmental impacts of water consumption and water stress are manifold. * Aquatic organisms…

Q: describe how glacial ice forms and flows, and how to categorizevarious kinds of glaciers.

A: Glaciers are the moving sheet of ice. They are formed from the snow. When snow falls, they…

Q: states impacted by the low-pressure system and the high-pressure system (identify which is which).…

A: Direction of teeth in front shows the direction of movement.

Q: provide scenarios for changes in the Earth System in the nearand very distant future.

A: Given that the question is to provide the scenarios for changes in the Earth system in the near and…

Q: Direction: Write an analysis of a selected text on the basis of it's claim/s, objectives, evidence,…

A: FUTURE AFFECTS OF GLOBAL WARMING:-     CLAIMS:-  The planet is warming from North pole to South…

Q: explain what groundwater is, where it resides in the Earth, andhow its composition and flow varies.

A: Groundwater is the water that is inside the earth's surface. The rocks with cracks have a saturated…

Q: Describe some of the ways in which human activities adverselyaffect the water table. What impact has…

A: Groundwater is a critical source of water for humanity. Groundwater serves as a source of drinking…

Q: Q13-4: L.F. Richardson and the First Numerical Weather Forecast Homework • Unanswered How and where…

A: Lewis Fry Richard was an English mathematician, meteorologist, physicist, psychologist who pioneered…

Q: What are the three temperature classifiers for North American air masses? Briefly describe each

A: Solution

Q: Cite some causes of loss of biodiversity in grassland ecosystem.

A: Loss of biodiversity is a major problem since last few decades. Some natural factors and some…

Q: explain how changes in sea level, wave erosion, and humanactivities affect the coast.

A: Sea level, wave erosion, and human activities are all characteristics that can contribute to coastal…

Q: explain how weathering and erosional processes in deserts differfrom those in temperate lands.

A: The crumbling down or disintegrating of rocks and minerals on the Earth's surface is known as…

Q: 9. Around some protostars, a cloud of dust and gas is found to emit infrared radiation. What is the…

A: The answer for this question will be the option E giant molecular cloud.

Q: Question: the most abundent elements in the material that make up the earth is iron. a.) true b.)…

A: Earth is a unique and third planet in our solar system and is also termed a blue planet due to the…

Q: Please use your own words to explain how niche partitioning promotes biodiversity.

A: Solution

Q: What factors transformed Oklahoma andTexas into the Dust Bowl during the 1930s?

A: Dust storms were caused by drought and overuse of land. Drought struck the country for the first…

Q: Question: Which of the following has the highest surface temperature?  a.) Venus  b.) Earth  c.)…

A: The Sun and its eight planets that are held together and revolving under the influence of gravity…

Q: Strategies and benefits in planting in recycled plastic container

A: First make sure most of the fresh plastic container where used and then they are not going to reuse…

Q: describe the evidence that major mass movements have takenplace under the sea, and that some of…

A: The earth's interior is classified in two ways on two different bases, viz., its chemical…

Q: How do researchers develop predictions offuture climate change?

A: Environmental change indicates to long haul shifts in temperatures and atmospheric conditions. These…

Q: Q1(a) Describe the conditions at which the well completion types illustrated in (a)-(d) in Figure…

A: After drilling operations, well completion is the process of preparing a well for production (or…

Q: Why does the velocity of a stream vary with location in a givenreach of the stream?

A: The velocity of stream in the river varies with the slope of the channel. Where slope is high,…

Q: Where do uranium deposits form in the Earth’s crust?

A: The geochemical classification of elements divides the elements into compatible and incompatible…

Q: One of the biggest impacts on the water cycle by global warming is A) the increase in albedo or…

A: Climate change is the change in the environment of the earth. Climate changes occurred from…

Q: Explain what is causing this change in the sun's angular size. Include a picture that shows the…

A:

Q: describe the difference between uplift and subsidence, anddescribe the forces that drive them

A: The earth's tectonic plates are not stagnant but have relative velocities. There are seven major and…

Q: 10. In which direction is the cold front moving in the map below low? The warm front? Warfn hopt.…

A: Fronts are common elements of weather in the midlatitudes (temperate area — 30° – 65° N and S). They…

Q: . characterize porosity and permeability

A: Groundwater is an essential component of the hydrological cycle. To understand where and why…

Q: An unusual late Precambrian rock unit crops out in the FlindersRange, a small mountain belt in South…

A: The Precambrian period is also said to be the glacial period on the earth and hence some researchers…

Q: Agriculture runoff can be best described as A) the total amount of water used to irrigate crops…

A: As the population increases day by day on our planet, the supply depends is also increasing. The…

Q: What type of cloud is?

A: Clouds are the visible aggregate of tiny water droplets or ice crystals suspended in the air. There…