The cosmological principle states that the universe is   I. expanding.   II. accelerating.   III. homogeneous.   IV. isotropic.   a. I and II   b. III and IV   c. I and III   d. II and IV   e. I, II, III, and IV

Q: Why are pulsars unable to emit pulses of visible light?   a. Pulsars are too hot to emit visible...

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

Q: Seyfert galaxies   a. are more common in close pairs of galaxies than in isolated systems.   ...

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

Q: Quasar distances are estimated by   a. observations of Cepheids within them.   b. observatio...

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

Q: Starburst galaxies   a. contain a large number of very young stars, but very little evidence of ...

A: Starburst galaxies do not contain a large number of very young stars. Starburst galaxies do not cont...

Q: Define water scarcity and water stress.

A: Earth is a terrestrial planet. This means it has a rocky surface primarily made up of silicate rocks...

Q: what is the relationship between air pressure and altitude?

A: Planet Earth has a blanket of air, covering the whole planet. We call this the Atmosphere. It may se...

Q: Explain why Cepheid variables are considered “standard candles.”

A: Cepheid variables are the stars that pulsate with a frequency proportional to their absolute magnitu...

Q: Explain what causes some stars to produce novae.

A: A star is an extra-terrestrial astronomical body that radiates its own energy due to the nuclear rea...

Q: If nothing can escape from a black hole, not even light, how do black holes emit X-rays?

A: Blackhole is a place in space where the gravitational pull is very high that even light cannot get o...

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: What is the difference between a spiral galaxy and an elliptical galaxy?

A: A galaxy is a system of stars, stellar remnant, interstellar gas, dust and dark matter. solar system...

Q: In a typical spiral galaxy, stars in the   a. disk have highly elliptical orbits.   b. halo ...

A: There are different materials bodies and patterns seen in the universe. One of which include the spi...

Q: If a ball of dough were to experience s1>s2=s3 what would be its appearance? (include in your gen...

A: Earth science is the study of the Earth and the various processes that are going on in the Earth sys...

Q: A planetary nebula   a. produces an absorption spectrum.   b. produces an emission spectrum....

A: A planetary nebula is an astronomical object consisting of a glowing cloud of gases and plasma forme...

Q: The Milky Way Galaxy is best described as a ________________ galaxy.   a. spiral   b. irregu...

A: Our solar system is located in Milky Way Galaxy. It is a spiral galaxy.

Q: What is the future of waste minimization of food industry

A: Food is a vital element for humans to survive. Food industries are developed which produce suitable ...

Q: Eventually, white dwarfs are theorized to turn into   a. brown dwarfs.   b. black dwarfs. ...

A: Dwarf stars are groups of stars created from nebulae of dust, H and He that differ in mass, luster a...

Q: What is environmental care and what methods or programs can we perform to that promotes environmenta...

A: Environment- Environment is defined as the ambiance of an organism. Anything that surrounds an organ...

Q: Thinking Critically What were the contributions of Captain James Cook? Does he deserve to be remembe...

A: The contributions of Captain James Cook are very famous to marine sciences. For the first half of th...

Q: Synchrotron radiation is produced   a. in planetary nebulae.   b. by red dwarfs.   c. by...

A: A star is an extra-terrestrial astronomical body that radiates its own energy due to the nuclear rea...

Q: The rotation curve of a galaxy can be used to determine   a. the relative number of hot young st...

A: The rotation curve of a galaxy can't be used to determine the relative number of hot young stars in ...

Q: What are green plans?

A: Every year as the world is facing environmental issues there are a lot of strategies that have been ...

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: 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: A 7.5 Richter magnitude earthquake is ______-- times more powerful than a 4.5 Richter magnitude eart...

A: Earthquake are cause by sudden movement of fault inside earth which releases the energy which is sto...

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: True or false 1. Both terracing and contour plowing increase infiltration and enhance water conserva...

A: Water and soil conservation is important for cultivation and farming. Several methods of cultivation...

Q: What are the effects of El Niño and La Niña? List down at least 3 each.

A:  El nino and la Nina both are unusual change in weather pattern which cause anomalies to different a...

Q: Synchrotron radiation is produced by   a. objects with temperature below 10,000 K.   b. high...

A: The electromagnetic energy emitted by the charged particles moving ata high speed is known as Synchr...

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: The increasing price of oil triggered by the ship incident in Suez Canal has caused the problem in g...

A: Natural resources are materials that come from the Earth and are used to support life and meet human...

Q: It is sometimes said, “Gravity always wins.” Explain this statement in relation to stars.

A: Gravity is one of the phenomena that tells us a lot about our life on Earth, and it explains a numbe...

Q: Quintessence is the name of the   a. force that led to the inflationary period of the universe. ...

A: In cosmology, quintessence is a genuine type of energy particular from any typical matter or radiati...

Q: The slowing of clocks in strongly curved space-time is known as   a. gravitational radiation. ...

A: The discovery of many astronomical concepts helps us to determine the understanding of several proce...

Q: How are ring galaxies formed?

A: In the universe several types of galaxies are present but the ring galaxy is different of all. A rin...

Q: What species was the main restoration focus on Nonsuch Island in Bermuda?

A: Ecological restoration is a process in which activities like reforestation, removal of non-native sp...

Q: Which is NOT a good distance indicator for galaxies?   a. globular clusters   b. type Ia sup...

A: Galaxy- A galaxy is a gravitationally bounded system of astronomical bodies A galaxy is a huge syste...

Q: What is the difference between soil, land and earth?

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

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: As a star exhausts hydrogen in its core, it   a. becomes hotter and more luminous.   b. beco...

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

Q: What is the difference between nature and nurture?

A: Between nature debate and nurture there is no winning side, as both influence the living being.  The...

Q: Which worked with Milton Humason in the 1920s to measure distances to a number of galaxies using Cep...

A: Hubble's law is a law of physical cosmology that defines the motion of galaxies with relation to the...

Q: Please define what is smart city by using the application of information technology and suggest five...

A: The smart-city is an urban-area concept is based-on the use of electronic sensors that collect-data ...

Q: Observations of galaxies and clusters of galaxies reveal that our universe is ___________________ pe...

A: Dark matter is a type of matter that does not interact with electromagnetic radiation in any way, be...

Q: Visit the Kaolin Mine in Sandersville GA. Describe the geological environment and the shape of the l...

A: The Kaolin is a geologic term used to refer to the white clayey rock which is composed of a Kaolin g...

Q: Modern observations show that the universe is   a. open.   b. closed.   c. flat.   d....

A: The observable-universe is in the shape of a ball consisting of matter which can be viewed from-eart...

Q: Poor clusters   a. contain more than 1,000 stars and are found in the halo of the galaxy.   b...

A: This vast universe is divided into many units, so we have dust, gas, stars and planets form a galaxy...

Q: Giant and supergiant stars are rare because   a. they do not form as often as main-sequence star...

A: A star is an extra-terrestrial astronomical body that radiates its own energy due to the nuclear rea...

Q: What kinds of nonmarine sedimentary deposits reflect cold environmental conditions?

A: Sedimentary deposits are the one which are formed by deposition and accumulation of sediment in depr...

Q: In the double-exhaust model, the geometry suggests that the radio lobes are inflated by   a. jet...

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