Answer: Options (1), (3), (4), (6) and (9)
Explanation: Hot-spots are the region of active volcanisms and this could be due to the presence of large mantle plumes, plate tectonic movement, as well as other reasons.
Hot-spots are generated in the following tectonically active boundaries such as-
- Convergence of two oceanic plates.
- Convergence of an oceanic and continental plate.
- Divergence of two oceanic plates.
- Hotspots within the oceanic and continental plate.
<span>Direct election of senators to Congress occurred because of the 17th constitutional amendment.</span>
Answer:
Earth's atmosphere is below 26 km is composed of 98%.
Explanation:
- Troposepher marks the boundary for most of the convective activity to take place on the surface of the earth's this place consist of 99% of the total space for the all-weather phenomenon to occur and as a result of which is considered to a homogeneous sphere.
- Here the water vapor, dust particles, and other gaseous bodies are found and thus this layer is a life-supporting layer full of oxygen and hence, comprise all biotic components like the plants, animal and man.
- Above this layer there are drastic changes in temperature with increasing height as the atmospheric pressure at higher altitudes decreases and so does the life-supporting layer, it can be noted that the layer that protects the earth i.e ozone is found in the mesosphere at an altitude of 30 kilometers.
- Rest most of the weather phenomenon takes place here as it sets the stage for weather patterns as convective currents coming from the equator can't pass this layer.
Answer:
<u>Pluto is dwarf planet composed of nitrogen ice, methane and carbon monoxide.</u>
Explanation:
Designated as a minor planet pluto is considered to be on the outer boundaries of the planets, being found in the 1930s is the ninth largest and the tenth object orbiting the sun.
Its atmosphere is mainly composed of methane, nitrogen and carbon monoxide and ice. Having a mass of that of the moon, it has mountains made up of ice masses its color varies from dark brown to orange to white. The latest studies show that pluto has an age of more than 180,000 years.
According to some studies it has mass wasting and tectonic like processes in operational at its surface. It is surface gravity is 0.63g and has five known natural satellites. A mean density of 1.854±0.006 g/cm cube.
