GPS Satellite Constellation: The baseline satellite constellation consists of 24 satellites positioned in six earth-centered orbital planes withfour operation satellites and a spare satellite slot in each orbital plane. The system can support a constellation of up to thirty satellites in orbit.
Answer:
<em>They orbit the Sun.</em>
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Explanation:
Asteroids are small planetary bodies, too small to be classified as a planet. Asteroids are made up of rocky materials, and they orbit the sun. In our solar system, a vast number of asteroids exists together in the 'great asteroid belt' a region between the orbit of Mars and Jupiter. A comet is a ball of frozen gas, rocks and dusts, that travels around the sun in the solar system. Comets can be as big as a small town. When the orbit of a comet brings it close to the sun, it melts, leaving a trail of gas behind it. This trail of gas is the characteristic long tail of a wishing star seen in the sky in some clear night.
<em>The common property of a comet and an asteroid is that they both travel around the sun in the solar system, just like every other planetary body in the solar system.</em>
Answer:
B. Geothermal refers to heat sources on the Earth’s crust
Explanation:
- The geothermal energy is the heat that is derived from the storing of energy that creates by the earth's temperature and the earth's crust is origin for this type of energy along with the radioactive decay of the elements of the crust.
- <u>Thus said to be earth's internal heat and needs to be trapped as it can get lost during the formation stages. </u>
- The temperature that occurs at the earth's core and the metal zone reaches up to 4000°C and thus the high temperature causes the rocks to melt and give rise to the temperature in the plastic mantle to get activated by the convection currents that reach the surface.
- Some examples of this geothermal energy are those of the hot spring and the rising lava or the magmas.
Answer:
Rain washes pollutants off streets and into storm drains, which drain into Puget Sound.
Explanation:
"Puget Sound" is a Pacific Ocean inlet that is located in Washington's northwestern coast. It is said that the name "Puget Sound" was given by George Vancouver in<em> 1792,</em> in honor of a lieutenant, Peter Puget, who was very helpful in guiding him through his expedition.
Puget Sound is home to many marine species, such as salmon, Pacific rods, harbor seals, Pacific herring and the like. However, some of these, like the <em>"Olympia oysters,"</em> have been depleted because of human activities. The recession of many species in this area has been increasing over time. It is said that the inlet was contaminated with radioactive water in 1978, when a submarine accidentally released the radioactive water into Puget Sounds.
Another reason for its buildup of pollution is through the <u>"storm water's run-off." </u>When a storm comes, it hits infrastructure's roofs and other surfaces or pollutants. The debris are carried into the drains by rain and are then drained further into Puget Sound.
The toxic chemicals that are carried primarily comes from the roofing materials or human's everyday products.
Explanation:
No matter the shape or size, wetlands provide numerous important services for people, fish and wildlife such as protecting and improving water quality, providing habitats for fish and wildlife, storing floodwaters, maintaining surface water flow during dry periods, and reducing soil erosion.
