The look-back time is   a. the time it takes for the light from an object to reach Earth.   b. numerically equal to the distance in light-years.   c. smaller for more distant objects.   d. all of the above.   e. a and b.

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: Begin an annual list of climate-related events where you live—for example, dates of first flowering;...

A: Climate is the condition of the weather that prevailed for a longer period over a specific area. Thi...

Q: Thinking Analytically Imagine that you set your watch at local noon in Kansas City on Monday and the...

A: Earth is nearly a sphere. It experiences day and night effects due to its revolution and rotation.  ...

Q: When were neutron stars first predicted?   a. 1806   b. 1932   c. 1967   d. 1983

A: The neutron-stars are the densest-objects in the universe have a force of-gravity that is about 1011...

Q: Boundary type: and Type of plates: How it's formed:

A: The given diagram is of the oceanic continental convergence. There is a clear divide between the oce...

Q: The blue area is the ocean floor, while the green and brown area is dry land. Which of the following...

A: Aerial photographs are pictures taken from above the land from a kite, or a drone or even from an ai...

Q: If you replaced our sun with a one-solar-mass black hole, Earth would   a. be sucked into the bl...

A: A black hole is a locale of space time where due to strong gravity that light cannot escape. The hyp...

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: 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 figure below shows a map of the Bouguer gravity anomaly measured over a well known massive sulph...

A: Bouguer Anomaly is basically a gravity anomaly that has been adjusted for the height at which it lit...

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: Aerosol perturbations to climate are distinctly different from greenhouse gases because they (select...

A: The greenhouse gases are very important to the earth because they trap the long-wave radiations emit...

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: Fill in the information for Rift Valley. Boundary Type: Type of Plate: M and How it's formed:

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

Q: The galactic center of the Milky Way lies in the constellation of   a. Sagittarius.   b. Cyg...

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

Q: Why was the oxygen revolution necessary for the evolution of animals?

A: Earth is the third planet in the solar system. It is the only planet known so far that can sustain l...

Q: What is the Schwarzschild radius of the sun?   a. 30 km   b. 9 km   c. 6 km   d. 3 k...

A: Firstly, let us discuss something about Schwarzschild radius, Schwarzschild Radius: The radius of a ...

Q: Explain how ozone is: a. Produce. b. Destroyed in the atmosphere.

A: Ozone is a molecule composed of three oxygen atoms that exists naturally in the atmosphere. Majority...

Q: What evidence to we have that the center of our galaxy is a massive black hole?

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

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: Enlist the consequences and main drivers of soil erosion?

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

Q: In the absence of modern technologies to forecast weather, How to properly disseminate the weather o...

A: Weather forecasting is the utilization of science and technology for predicting the atmospheric cond...

Q: What is the difference between ambient and stratospheric ozone? What is destroying stratospheric ozo...

A: Ozone is a compound made up of three oxygen atoms that is naturally present in the atmosphere. Altho...

Q: True or False 1. To bring about a fusion reaction, the reacting nuclei must be brought very close to...

A: Nuclear fusion is a response where at least two nuclear cores are consolidated to shape at least one...

Q: topographic map

A: The above shown is a topographic map which is one that shows the earth's surface on a large scale. T...

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: what is the type of this structure and how it's form?

A: Features of igneous rocks which develop on a large scale in the body of extrusive or intrusive erupt...

Q: Thinking Critically Imagine a tectonic plate moving westward. What geological effects would you expe...

A: Tectonic plate- The lithosphere of the earth is made up of different fragments of lithospheric plate...

Q: How does the process that turns clay into shale differ from the process that turns sand into sandsto...

A: Geomorphology is the study of the landforms, structures, features, how they have formed, the sedimen...

Q: What do we mean when we say something is dense?

A: Volume of a matter or substance is quantity in a three-dimensional space which is close by some surf...

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: Gravitational lensing   a. occurs when light passes near a massive object and is deflected by th...

A: Gravitational lensing (GL): It is an effect that causes a change in the direction of the path of lig...

Q: Who discovered the peculiar pattern of radio signals that were eventually found to be from a pulsar?...

A: Radio signals are signals that are emitted by all objects in space. Radio signals are prominently em...

Q: An elliptical galaxy contains   a. mostly lower main-sequence stars and giants.   b. mostly ...

A: Elliptic galaxies: These galaxies appear as "elliptical" or oval discs. We notice that the light is ...

Q: True or False 1. As societies evolve from primitive to agricultural to industrialized, the daily per...

A: The human civilization has evolved from primitive agrarian to modern technological one. This can be ...

Q: A type Ia supernova is believed to occur when   a. the core of a massive star collapses.   b....

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

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: In what nonmarine settings do gravelly sediments often accumulate?

A: Gravelly sediments or gravels are clastic sediments that lie in the size range of 4.75 mm to 75 mm, ...

Q: . What is ‘water economy’ of plant and how it could be disturbed by pathogens? Give suitable example...

A: An economy is a broad collection of interconnected creations and their usage activities that help de...

Q: The Schwarzschild radius of a 2-solar-mass black hole is approximately   a. 6 km.   b. 4 km....

A: There are various systems functioning in the outer space. These include celestial bodies and also ma...

Q: The cod populations of some communities have become drastically reduced in number due to overfishing...

A: Killer whale for its food depends on cod and Harp seal. Harp sea depends on cod for its food. 

Q: Earth Science Question

A: The driest and the oldest place present on the earth is the Atacama Desert. On the western side of t...

Q: Main-sequence stars of which spectral class use the CNO cycle?   a. A   b. G   c. K  ...

A: Star’s spectral class  gives data on its temperature, composition, Mass, and age of the star. These ...

Q: help

A: Note: Since you have posted a question that has multiple parts we will solve the first three parts. ...

Q: The extinction of starlight as a result of the interstellar medium   I. is the greatest in the ultra...

A: The medium that exists between the space and star system in the galaxy is called interstellar. The m...

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: 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: ich of the foll- object is a fossil? O Biogenicity O Synchroneity

A: Antiquity is the term among the given terms which is not used in the determination of fossils.  

Q: Compared to open star clusters, globular clusters tend to be   a. richer in metals and younger. ...

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

Q: What are the functions of soils in a rice field, and suggest management activities to maintain a hea...

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