Observations of galaxies and clusters of galaxies reveal that our universe is ___________________ percent dark matter.   a. 5 to 10   b. 20 to 25   c. 50 to 55   d. 80 to 90

Q: Why does our relatively small Moon have a greater tidal effect on Earth than the gigantic Sun?

A: Tides are long-period waves that move through ocean and water bodies. They occur due to the gravitat...

Q: Which type of rocks is rich in minerals? Explain

A: Rock is a naturally occurring solid mass of one or more minerals. It is the fundamental unit of soli...

Q: The series of processes in which rock changes from one type to another is called the

A: Rock is solid substance naturally occurring aggregate of mineral or sediments matter. Different rock...

Q: What pieces of evidence have been used in support of Plate Tectonic Theory?     The shape of c...

A: Plate tectonics theory describe the motion of tectonic plates.it state that the tectonic plates or t...

Q: What causes glacial advances and retreats during an Ice Age?

A: A glacial period is a time interval marked by colder temperature and glacial advances. It lasts for ...

Q: A soil column of unit cross-sectional area at right angles to thedirection of flow of water and stat...

A: Soil is the uppermost layer of the lithosphere and the earth’s crust. Soil is the skin of the earth....

Q: Astronomers now speculate that a galaxy’s shape depends on all of the following EXCEPT   a. the ...

A: The galaxy's shape depends on the rate of star formation. The galaxy's shape depends on the history ...

Q: Stars with masses between 0.4 M and 4 M   a. undergo thermonuclear fusion of hydrogen and helium...

A: The universe is formed around 13.8 billion years ago. At the time when it got formed, it was a size ...

Q: List 5 of the largest 13 cities in 2016.

A: The large cities : is a series of nearly contiguous metropolitan areas, which may be somewhat separa...

Q: Earth Science Question

A: Relative humidity is given in percentage and tells you how close the air is to being saturated. wate...

Q: What is the difference between rich and poor galaxy clusters?

A: Firstly, let us discuss something about Galaxy, Galaxy: A gravitationally bound system of stars, ste...

Q: The event horizon   a. is believed to be a singularity.   b. is a crystalline layer.   c....

A: Event horizon is a boundary which marks the limit to which or beyond which an event cannot affect. I...

Q: The distance to a galaxy is 50 Mpc and it has a recession velocity of 3,500 km/sec. What is the calc...

A:  The distance to a galaxy, d = 50 Mpc The recession velocity, v = 3,500 Km/sec Hubble constant, H0 =...

Q: The Hubble law compares what two variables?   a. distance and size   b. apparent velocity of...

A: In Hubble law, the velocity of galaxy is directly proportional to the distance from the origin. 

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: A _________________ generally contains considerably more than 1,000 galaxies and is quite dense. Suc...

A: Stars are one of the most important parts of the universe and are at the center of the galaxies. The...

Q: Why were oceanographic conditions at Earth’s poles of interest to scientists?

A: Oceanology is one of the important and modern sciences facing studies to research and gather informa...

Q: The Chandrasekhar limit gives the maximum value of   a. a red dwarf.   b. a main-sequence st...

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

Q: What evidence is there that an asteroid struck Earth at the end of the Cretaceous Period?

A: An asteroid of relatively big size struck on the earth at the end of the Cretaceous period, which is...

Q: VI.In 2 (two) sentences, describe the rainy and dry seasons in the Philippines.

A: Season is a period or time of a year which are characterised by a special climatic condition, there ...

Q: Oceanic crust Continental crust Lithosphere - Lithosphere Asthenosphere Oceanic-continental converge...

A: Volcanic island arcs are long chains of island arcs, associated with intense volcanic activity and o...

Q: The youngest stars are   a. Extreme Population I.   b. Intermediate Population I.   c. E...

A: The universe is all the time and space that includes all the galaxies, stars, planets, and all forms...

Q: 1. Find the elevation of the contour lines furthest east, west, and south 2.what is the elevation of...

A: Contour- The contours are imaginary lines joining places lying at the same height above the mean sea...

Q: Classify the following hazards according to their types. Write your answer in the corresponding colu...

A: A hazard is any agent that can cause harm to humans and the environment. Risk is the possibility of ...

Q: The Coma cluster   a. is the galactic cluster that contains the Milky Way.   b. is the oldes...

A: The galactic cluster that contains the Milky Way is the Virgo supercluster.  Coma cluster is not the...

Q: Choose one of the material cycles (carbon, nitrogen, phosphorus, or sulfur) and identify the compone...

A: I choose the carbon cycle. It influences the CO2 amount in atmosphere. Carbon is gone through all sp...

Q: Again, generally speaking, would you say beaches on U.S. coasts are growing, shrinking, or staying a...

A: Beaches- A beach is a narrow strip of land that separates a water body from the inland areas. A beac...

Q: Do you think building wind farms in remote places, parks, or scenic wilderness areas would be damagi...

A: Wind farms are also called wind parks, which are the areas in which windmills are placed. Wind turbi...

Q: Younger stars have more heavy elements because   a. old stars destroy heavy elements as they age...

A: Young star or protostar are the one which are still gathering mass from the parent cloud. This is th...

Q: Visit the Cumberland Plateau. What rocks make up this region? How old are they and what depositional...

A: The Cumberland Plateau is a part of the Appalachian Plateau due to the presence of mountain breaks, ...

Q: Discuss the dangers posed to existing community members when new species are introduced into ecosyst...

A: Species- A species is the fundamental unit of taxonomic classification and is the basic unit of clas...

Q: What are the types of ocean waves, arranged by disturbing force and wavelength?

A: The waves that are formed on the surface of the oceans because winds are called ocean waves. These w...

Q: 1 message Which processes lead directly to the formation of metamorphic rock?

A: There are different types of rocks that are seen in the world. These rocks are formed due to the nat...

Q: 1.) What is the basis for dividing the atmosphere into four layers?

A: The atmosphere is the blanket surrounding the environment. This blanket consists of various layers d...

Q: Explain what causes the temperature to increase with height through the stratosphere, and decrease w...

A: The temperature through the atmosphere was determined by the gas constituents in it. The temperature...

Q: Fill in the information below for a Deep Ocean Trench. Boundary type: Type of Plates: and How is it ...

A: Tectonic plates are part of earth crust and upper mantle which together are called as lithosphere. t...

Q: PLEASE SOLVE !!

A: Hydrothermal vents are geothermal fissure regions that are present in active tectonic regions, like ...

Q: Who first calibrated the Cepheid variable stars for use in determining distance?   a. Henrietta ...

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

Q: What is the solar constant? How is it used to determine the effective surface temperature of the sun...

A: Solar Constant is defined as that amount of radiant solar energy obtained at the earth's outer layer...

Q: Stars that are giants fusing helium in their cores and then their shells are found where on the H–R ...

A: The universe consists of several galaxies and other celestial bodies. It got formed around 13.8 bill...

Q: Earth Science Question

A: Firstly, let us discuss something about the Atacama Desert, The driest non-polar desert in the world...

Q: What forces are responsible for the motion of planets and other celestial bodies?

A: All celestial objects in the universe follow certain paths for their stability. The position of seve...

Q: What is a fossil? Is a footprint a fossil?

A: The study of earth science has a distinct branch of study where we study the fossils found preserved...

Q: Define energy and explain how thermodynamics regulates ecosystems.

A: An ecosystem is a community or system in which living organisms interact with each other and the sur...

Q: True or False   1. Some of the heavier hydrocarbons may also be broken up during refining into small...

A: During the history of planet earth, many different organisms thrived and became extinct. Some millio...

Q: The supermassive black hole at the center of the galaxy is estimated to be   a. 4 solar masses. ...

A: The Supermassive Black Hole(SBH)s are a type of black hole which has high mass and less volume locat...

Q: The _____________________ are places in the orbital plan of a binary star system where a bit of matt...

A: In the case of the binary star system,the two stars orbit around a common centre of mass.  Almost 85...

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: Summarize chapter 13 (Ozone &climate change)

A: Ozone (O3) is a profoundly responsive gas made out of three oxygen molecules. It is both a character...

Q: Give an example of evolutionary convergence.

A: Earth is the third planet in the solar system. It formed almost 4.5 billion years ago. It is the onl...