on September 30, 2022
What model best describes the alignment of the Sun and Moon during a lunar eclipse?
Earth scienceAsked by: Marcus Cahill How will you describe the alignment of Earth Moon and Sun in lunar eclipse? When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth. When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. Lunar eclipses can happen
on September 30, 2022
Geo-Spherical shape of Earth
Earth scienceAsked by: Marcus Cahill The earth’s shape is a spheroidspheroidAn oblate spheroid is a famous shape. It is the shape of the Earth and some other planets. It is like a sphere squashed from the top so the circumference around the poles is less than the circumference around the equator. Shapes of this type are
on September 29, 2022
A few questions about glass
Earth scienceAsked by: Karl Dance What are questions about glass? Glass Questions How can glass be a liquid if it’s so hard? How can it be so hard to drag rubber across smooth glass if friction is caused by surface roughness? What kind of crystal are crystal drinking glasses made out of? Why are crystals rare?
on September 29, 2022
How much does the biosphere contribute to Earth’s entropy production?
Earth scienceAsked by: Karl Dance Why is entropy of Earth increasing? The decrease in entropy for the Earth system can be attributed to the incoming heat from the sun occurring at higher temperature on the planet’s surface during the day, whereas the same amount of heat (approximately, on average) leaving the planet during the subsequent night
on September 29, 2022
Haean, South Korea: is it of volcanic or meteor impact origin?
Earth scienceAsked by: Sarah Rosales Is Korea a volcanic? There are three volcanoes in the Korean Peninsula. The biggest one is Mt. Baekdu with the last activity being recorded in 1903. The second volcano is Mt. Does South Korea have any volcanoes? South Korea has 3 Holocene volcanoes. Where are the volcanoes in Korea? The volcanoes
on September 29, 2022
Can we separate a sandy, clayey & salt layer on basis of their rheological properties?
Earth scienceAsked by: Sarah Rosales Can you separate sand from clay? Quote from video: And clay is small particles and sand is large particles. You can also dig a huge hole in dirt hole and fill that dirt hole with water. Can clay be separated? The answer is Decantation. Clay is separated from water by the
on September 29, 2022
Is there a freely usable map of Earth cave systems and/or density?
Earth scienceAsked by: Dave Day What is a cave map? A cave survey is a map of all or part of a cave system, which may be produced to meet differing standards of accuracy depending on the cave conditions and equipment available underground. How do they map out caves? The process of mapping caves takes patience
on September 29, 2022
Interpreting Prospecting Ore Test Result
Earth scienceAsked by: Dave Day What is a high grade nickel deposit? Therefore, anything over 20 metres in thickness (significantly less thickness than other commodities) and 2% nickel grade or better would be reasonably considered high-grade. What is grade of an ore? The grade of ore refers to the concentration of the desired material it contains.
on September 29, 2022
Why were no interferometers launched on weather satellites between the ’69-’72 IRIS-D and the 2002-onward AIRS?
Earth scienceAsked by: Laura Blackburn What is the purpose of a weather satellite? Weather Satellites are an important observational tool for all scales of NWS forecasting operations. Satellite data, having a global view, complements land-based systems such as radiosondes, weather radars, and surface observing systems. There are two types of weather satellites: polar orbiting and geostationary.
on September 29, 2022
Will Lithium batteries mean we have to exploit Co-Mn-Ni nodules from the seafloor?
Earth scienceAsked by: Laura Blackburn Can lithium be mined from the ocean? Researchers have devised numerous filters and membranes to try to selectively extract lithium from seawater. But those efforts rely on evaporating away much of the water to concentrate the lithium, which requires extensive land use and time. To date such efforts have not proved