Atmospheric Sciences

All forms of electromagnetic radiation travel through vacuums. No transmission medium is required. Some forms of EMR -- visible light, for example -- cannot pass through solid objects, however.

Seasonal changes in carbon dioxide levels are driven by the Earth's natural processes. During the winter, plants go dormant and release less oxygen during photosynthesis, causing carbon dioxide levels to rise. In the spring and summer, plants become active and absorb more carbon dioxide, leading to a decrease in atmospheric levels.

Gas molecules are highly spaced out in a layer due to their high kinetic energy, resulting in weak intermolecular forces. This quality allows gases to easily compress and expand to fill a container evenly.

Earth's densest layer is the inner core, which is a solid, dense ball of metal composed mainly of iron and nickel. It has a density of around 13 grams per cubic centimeter.

Earth's atmosphere is divided into five main layers based on temperature changes: the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer has distinct characteristics and plays a unique role in Earth's atmosphere.

The moisture-laden winds blowing from the ocean to the land during summer are called the southwest monsoon winds. The dry winds blowing from the land to the ocean during winter are called the northeast monsoon winds.

Pittsburgh is not directly located on the coast, so it is less likely to be directly hit by a hurricane. However, the remnants of a hurricane can still bring heavy rainfall and strong winds to the region, leading to potential flooding and other weather-related issues.

Forests can be colder due to factors such as shade from tree canopies reducing direct sunlight, higher humidity levels, and the process of transpiration where trees release water vapor, cooling the air. However, the oxygen excreted by trees does not significantly contribute to the cooling effect in forests.

Depends on what you mean by animal. I think Earthworms (which belong to the kingdom of animalia) are a possible candidate. As I've understood it, the common earthworm Lampito can tolerate body temperatures of about 17 Celsius, while the commercial earthworm Perionyx can tolerate body temperatures of about 9 Celsius. Source: http://jeb.biologists.org/cgi/content/abstract/59/3/655 I'm currently searching myself what the lowest temperature a mammal can tolerate is. Edit: it turns out the lowest NORMAL body temperature of any mammal is that of the giant anteater. It also has the greatest variation of normal body temperature, from 33 to 36 C.

The tardigrades or water bears belong to the kingdom animalia and can go in cryostasis. Some can tolerate temperatures very close to the absolute zero, -273 C, temperatures which on earth can only be achieved in the laboratory. However, tardigrades in cryostasis aren't functioning normally. In fact, it's arguable if they're technically alive. Through hypercapnia and hypoxia, nine cats survived to temperatures as low as 12,5 degrees, though this was in the laboratory. Source: http://ajplegacy.physiology.org/cgi/content/abstract/196/2/354

Cold air is more dense and less buoyant than warm air.

The first layer of the atmosphere that an astronaut passes through during reentry from space is the exosphere. This layer is very thin and transitions into the thermosphere, which is where most reentry vehicles begin to experience drag and heating due to interaction with air molecules.

temperature and composition as you move higher. The lowest layer is the troposphere, where temperature decreases with altitude. Next is the stratosphere, with an increase in temperature due to the ozone layer. The mesosphere follows, cooling again, and finally, the thermosphere with extreme temperatures and very low density.

Typically, the ground is colder than the air. This is because the ground absorbs and retains heat from the sun more slowly than the air, resulting in cooler ground temperatures.

0.8 degrees Celsius, since 1850. 1850 was a known low temp referred to as the mini ice age. The total warming started roughly 10,200 years ago and is, in total, about 11 degrees C.

0.6 of the current warming occurred before World War 2. The temperature dropped for a few decades in the 1970's despite increasing use of fuel.

2010 tied with 2005 as the warmest years on record. The ten hottest years have all happened since 1998.

Ozone is found in all layers of the atmosphere. It is a minimum value at the extremes of the exosphere, and the bottom of the troposphere (where it is called a pollutant), with a peak value in the lower stratosphere. Ozone concentrations in excess of 0.05ppm in the lower troposphere is dangerous to people with asthma, and much above this, damages plants as well.

Oxygen is the most reactive gas in the atmosphere. It readily combines with other elements and compounds to form oxides.

When the dew point decreases while the amount of water vapor remains constant, the air temperature is also decreasing. This means the air is cooling down without any change in water vapor content. Eventually, the air temperature will reach the new, lower dew point, and condensation will begin.

Weight is not something that is measure in a tornado. Even then, the size of a tornado, and therefore the amount of air it contains, varies widely.

The sky is blue because of Rayleigh scattering -- blue photons scatter off air molecules to a large extent, while the other colors travel directly in straight lines from the sun, making the sky appear blue and the sun appear yellow (white minus blue). In space, or on the airless moon, the sky is black and sun is white.

It is NOT true that oceans look blue due to sky reflection. Water also scatters blue light, so the explanation of its color is largely the same as that for the sky.

This is the greenhouse effect. While it is a natural effect, it is being enhanced by human emissions of carbon. Without humans, the concentration of CO2 would be less than 300ppm, while it is currently 390 ppm.

Chapter 4 of the 9th class Social Science textbook typically covers the topic of climate. It discusses various aspects of climate such as the factors influencing climate, types of climate around the world, and the impact of climate on different regions. The chapter may also focus on climate change and its effects on the environment and people.

Reducing greenhouse gases in the Earth's atmosphere would help mitigate climate change by lowering global temperatures and reducing the intensity of extreme weather events. It would also slow down the rate of sea level rise, protect ecosystems and biodiversity, and improve air quality, leading to overall healthier living conditions for both humans and wildlife.

Weather primarily takes place in the troposphere, the lowest layer of Earth's atmosphere where most weather phenomena occur. This is where clouds form, precipitation falls, and temperature changes are most pronounced.