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

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

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: 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: 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: 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: 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: 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: 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: 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…