1. Fossils of the ancient reptile mesosaurus were discovered in South America and Western Africa
2. Climate is the same in South America and Western Africa
3. Geology is the same, particularly having the same types of rocks in South America and Western Africa
Meandering caused the two oxbow lakes to be formed.
Explanation:
There are multiple different types of lakes, and the type of a lake is determined by the manner in which it has been formed. One of the lake types is the oxbow lake. This type of lake form from the preexisting meanders of the rivers, and they are located right next to a river, usually being separated by the river by only few meters.
When a river is meandering, which happens in flat terrain where the river is slow, it gradually takes up a snaky shape. This type of shape of the river can only go a certain point, till about 90 degrees angle of curvature. Once this angle is reached, the water starts to erode the sediment as it finds it hard to curl. Over time, the sediment is totally eroded, and the river continues in a straight line, cutting off the water to meandering parts, and separating itself from them. This results in the formation of oxbow lake, which is a bow-like, shallow lake.
Other types of lakes are:
- tectonic
- volcanic
- organic
- glacial
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Answer: D. demographers
Explanation:
When planning for the future of a city, the urban planners need to ensure that the city is able to afford its current and future residents with the facilities needed to provide them with the maximum welfare possible.
To do this the urban planners should reach out to demographers. Demographers study human populations with a view to analyse and ascertain various characteristics such as size, composition, how they are distributed within a geopolitical zone and most importantly, how they will change overtime.
For urban planners to plan for a city that will take care of future residents as well, they would need to know how the kind of future residents they are planning for and this is when they will turn to demographers whose job it is to study and possibly predict future population.
Answer:
The Gulf Stream is an intense, warm ocean current in the western North Atlantic Ocean.
Since the Gulf Stream also extends toward Europe, it warms western European countries as well. In fact, England is about the same distance from the equator as cold regions of Canada, yet England enjoys a much warmer climate. If it weren't for the warm water of the Gulf Stream, England would have a much colder climate.
Answer:
The Bulk density = 1.3 g/cm³
the porosity of the sample is 132 cm³
Explanation:
Given:
Volume of cylinder = 260 cm³
Mass of container and the soil = 403 g
Mass of the empty container = 65 g
Thus,
The mass of the soil is = 403 - 65 = 338 g
Now,
The Bulk density = 
or
The Bulk density = 
or
The Bulk density = 1.3 g/cm³
also,
average particle density for mineral soil is usually given as 2.65 g/cm³
i.e the air present in the given soil sample has reduced its density from 2.65 g/cm³ to 1.3 g/cm³
The mass of the whole sample = Volume × Density
= 260 × 2.65
= 689 gm
but,
The actual mass of the dry sample = 338 g
thus,
Mass of air in the sample = 689 - 338 = 351 g
Therefore,
the volume of 351 g soil = 
= 
= 132.45 cm³
so the porosity of the sample is 132 cm³
