That Mercury has a large iron core is evidenced by   a. the large lobate scarps.   b. the large mean density of Mercury.   c. the lava flows near Caloris Basin.   d. all of the above.   e. none of the above.

Q: Other than the externally-imposed cooling rate, what are the three principal rates that govern rock ...

A: The Earth is made up of various kinds of rocks. These rocks begin their life cycle from the solidifi...

Q: Fossils provide evidence that best helps scientists determine changes over time in... the en...

A: Fossils are defined as the remains of the once-living organism and/or its behavior which are geologi...

Q: What are interesting facts about soil in the Appalachien mountains ? (Not essay)

A: Soil is a critical system to support the ecosystem, providing water and nutrients to trees and other...

Q: Condensation in the solar nebula probably led to the formation of   a. icy grains beyond the pre...

A: Firstly, let us discuss something about Solar Nebula, Solar Nebula:  gaseous cloud

Q: TRUE OR FALSE 1. Sea breeze moves from the sea to the land during the night. 2. The ITCZ is the pl...

A: Sea and land breezes are the local processes that help to balance the coastal temperatures. The temp...

Q: What are the characteristics of a quasar?

A: Quasars have a highly luminous active Steller galactic-nucleus in with a super massive-black hole re...

Q: Most of the bright lines in the spectrum of the quasar 3C273 are caused by   a. hydrogen.   b...

A: Ever since the beginning of the Universe, matter and energy were created. These matters and energy e...

Q: What is a lake? Are lakes temporary or permanent? Explain.  a. Give one example and explain how it f...

A: Earth is the third planet in the solar system and a terrestrial planet as well. The earth's surface ...

Q: Explain how Porphyritic texture is most likely to develop

A: Texture- A texture is the outer look of rock in terms of its grain or crystals, whether it be igneou...

Q: How are oil and natural gas thought to be formed? How can these substances be extracted from the sea...

A: Oil & natural gases are non-renewable natural resources. These are very precious & found in ...

Q: Which type of rock is rich in minerals (Igneous, Sedimentary, Metamorphic)?  Explain.

A: A rock, in geology, a natural and cohesive collection of one or more minerals. Such aggregates form ...

Q: astronomy where are we located in the galaxy?

A: Galaxy, any star systems and objects between stars that make up the universe. Many such gatherings a...

Q: Which of the following earth components has absorbed the most heat from global Warming: A. Atmos...

A: Global warming is a condition in which the earth's temperature rises due to rising temperatures. Gre...

Q: What do the spectra of Seyfert galaxies tell astronomers?

A: Seyfert galaxies are active galaxies that are present in space. They have a very bright core, due to...

Q: What are Dimensions of pollution? Define any one with its trends and effects or risk for Environment...

A: The environment is the complexity of the physical, chemical, and biological factors that affect the ...

Q: The central regions of Earth’s core are a solid because   a. the composition at the center of th...

A: Earth's center is the extremely hot, exceptionally thick focal point of our planet. The ball-formed ...

Q: 4) Which well will be a flowing artesian well?   A B C

A: Water storages have been a reason of concern for humans for a long period and with increasing heat o...

Q: When minerals in a metamorphosed rock have changed in both size and shape, we know that rock has bee...

A: The earth’s crust is made up of rocks and minerals and these rocks are mainly igneous rocks that are...

Q: The orbits of the planets   a. all lie in approximately the same plane.   b. lie perpendicul...

A:  Planets are astronomical object which orbit a star like sun, such planets are massive enough to be ...

Q: How were quasars discovered?

A: Quasars are luminous galactic object which have very high luminous nucleus, in which a supermassive ...

Q: The Jovian problem is that   a. the Jovian planets in the solar system are closer to the sun tha...

A: Option c will be the correct answer.

Q: Irregular galaxies make up about what percentage of all galaxies?   a. 1 percent   b. 25 per...

A: Irregular galaxies have no specific shape like elliptical or spiral galaxies. It makes up only a sma...

Q: How do comets differ from asteroids?

A: The asteroids and the comets are both moving celestial-objects that orbit the-sun and they have unus...

Q: In the unified model of active galactic nuclei, the broad line region in an active galactic nucleus ...

A: An Active Galactic Nuclei (AGN) is present in active galaxies. This is an area in a galaxy where it ...

Q: What is a lake? Are lakes temporary or permanent? Explain. a. Give one example and explain how it fi...

A: Earth is the third planet in the solar system and a terrestrial planet as well. The earth's surface ...

Q: Compare the atmospheric simulations of the Ice Age, 1750, and today. What is the equilibrium tempera...

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

Q: Provide at least 3 different ways that fire service professionals can address vacant buildings withi...

A: Vacant buildings are residential areas that are newly filled with people or are totally newly built....

Q: Rivers and stream ecosystems are described to be one of the highly productive in biodiversity. Compa...

A: An ecosystem is one of the highest hierarchy levels in the ecological succession of the biosphere of...

Q: Space-time will be flat if   a. the universe is expanding.   b. the universe is accelerating...

A: Let us discuss something about Universe, All of the space and time, including planets, stars, galaxi...

Q: Which method is NOT used for determining the mass of a galaxy?   a. rotation curve method   b...

A: The rotation curve method is the method for determining the mass of the galaxy. The Cepheid variable...

Q: What is being done to reduce NO2 pollution?

A: Nitrogen oxide gas in all its types is toxic and harmful, and this gas can lead to eye and respirato...

Q: Which major galaxy classification contains no visible gas or dust and lacks hot bright stars?   a...

A: Near about 13.8 billion years ago our universe got formed. At the time when it got formed it was a s...

Q: How would the angles of the dance differ during the winter vs. during the summer? (hint: where does ...

A: The exact location in both summer as well as in winter varies for sun rise and sun set.

Q: Rotation curves of galaxies show that the centers of galaxies must be very massive and probably cont...

A: Rotation curves of galaxies show that the centres of galaxies must be very massive and probably not ...

Q: The lunar maria are   a. the lava plains of the lunar lowlands.   b. the smooth plateaus of ...

A: Ever since the beginning of the Universe, matter and energy were created. These matters and energy e...

Q: What are the special features in the restoration that will help endangered species adapt to sea leve...

A: The rising sea level is due to the amount of climate change the world is facing. This is leading to ...

Q: 4 The image above shows a set of objects found in the sky. The Sun is the same type of object. But t...

A: Star is an astronomical object which has a sphere of light around it due to plasma and are hold toge...

Q: 44) What additional information would allow you to determine if the exposed geologic formation corre...

A: In the given image the rocks are in a geological sequence from which one can acquire information abo...

Q: Which of the following would you expect to see on a clear day in Michigan at 14:00 local time: (ther...

A: Michigan is located in the northeastern part of the United States of America, and it is the third la...

Q: Pyroxene can be replaced by hornblende, biotite, or chlorite as a pluton cools. Hornblende can be re...

A: According to the Bowen reaction crystallization sequence of discontinuous series, the early formed c...

Q: Suppose that Mercury grew to its present size in 1 million years through the accretion of particles ...

A:  mass of mercury= 3.3 × 10 23 kg time taken for mercury to grow to its present size= 1 million years...

Q: The orbits of the planets lie mainly in the same plane because the planets   a. formed from a la...

A: Firstly, let us discuss something about orbits and planets, Orbit: It is the gravitationally curved ...

Q: The Jovian problem refers to   a. the high speed with which the Jovian planets rotate on their a...

A: Firstly, let us discuss something about Jovian Planet, Jovian Planet: Jupiter, Saturn, Uranus, and ...

Q: Observations of galaxies and clusters of galaxies reveal that our universe is _____________ percent ...

A: Dark matter is a form of matter in the universe and its presence is distinguished from its gravitati...

Q: What is the importance of the arrangements of the Earth’s layers based on their densities.

A: Earth is a terrestrial planet, meaning it has a rocky surface that is primary made up of silicate ro...

Q: The galaxy cluster that includes the Milky Way is called   a. the Sagittarius Group.   b. th...

A: The universe formed around 13.8 billion years ago. The time it got formed it was of a size of a dot....

Q: The Milky Way is part of   I.   a poor cluster.   II.  a rich cluster.   III. the Virgo Cluster.   I...

A: Like all other galaxies that have a star in their center our galaxy also has a star. The Sun is the ...

Q: 1-Climate Phenomena - Fill in the table with the needed information about the global climatic phenom...

A: Climate is the average weather pattern of a region. It is the average of almost 30 years of weather ...

Q: Which of the following are the three dimensions of sustainability? A. Environmental, social, and...

A: Sustainable development is the idea that human societies must live and meet their needs without comp...

Q: Rapid fluctuations of quasars show the objects must be very   a. big.   b. bright.   c. ...

A: Quasars are luminous galactic object which have very high luminous nucleus, in which a supermassive ...