Answer:
Explanation: The huge pressure at these depths (20 to 100 km) squeezes the rock like a sponge, forcing the melted material (magma) to rise toward the surface. Peridotite fragment (originally mantle rock) contained within basalt (partial melt) erupted from a volcano.
Answer:
Automobiles release hydrocarbons that react to form pollutants in dry air.
Explanation:
- As carbon from the gasoline mixes with the air it reacts and starts to burn and this burning of hydrocarbon in the air produces heat, smoke, and gases, as well as chemical byproduct like water and carbon particulate matter.
- 22.38% of CO2 is produced by burning one gallon of petroleum. So, for the hydrocarbon to get successfully converted into carbon dioxide and produce carbon monoxide in the air it needs to react and burn, and CO is the result of not a sufficient amount of O2 in the air.
- Various automobiles release the nitrogen sulfur into the air and soil and give sooty dust and particle sizes that can change the composition of the further atmospheric cycle.
- As earth air is composed of <u>78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide</u>. The more gases that are released more spread the pollutant content of the air.
Alfred Wegener produced evidence in 1912 that the continents are in motion, but because he could not explain what forces could move them, geologists rejected his ideas. Almost 50 years later Harry Hess confirmed Wegener's ideas by using the evidence of seafloor spreading to explain what moved continents.
- <em>Since there are 24 hours in a day and 360 degrees in a circle, the sun moves across the sky at a rate of 15 degrees per hour (360° ÷ 24 hours = 15° per hour).</em>
- <em>To cover a distance of 1° (i.e., per longitude), the sun will take (60 ÷ 15 =) 4 minutes. Thus, the time difference per longitude is 4 minutes.</em>
- <em> Thus, the time difference per longitude is 4 minutes.Now, between A and B, the number of longitudes is (90 - 15 =) 75. Thus, the time to cover 75 longitudes is (75 x 4 =) 300 minutes or (300 ÷ 60 =) 5 hours.</em>
- <em> Now, since B (at 90W) is to the west of A (at 15W), time-wise, A is ahead of B, by 5 hours. So, if at A, the local time is 7 AM, the local time at B is (7 – 5 =) 2 AM.</em>
<em>hope</em><em> </em><em>it</em><em> is</em>
The correct answer is (4)
Halite is the natural form of salt commonly referred to as rock salt. It is a common and well known mineral and is found in solid masses, and as dissolved solution in the oceans and in salt lakes.
The inland lakes that are rich in salt exist in arid regions, and may also be below sea level without an outlet. These lakes evaporate during dry seasons, causing a recession in the water level and an icrease in salinity content.
When this happens, salt forms on the evaporated shores of the lake.