The larger the frequency, the shorter the wavelength. if the wave length increases, the frequency goes down.
Answer:
b. each has its own geologic history.
Explanation:
An ocean is a body of salt water which covers approximately 70% of the Earth's surface. About 97% of the Earth's water is comprised of ocean and as such it is the most prominent and defined feature of the Earth. There are basically four (4) categories of an oceanic basin and these are;
<em>1. The Pacific ocean. </em>
<em>2. The Artic ocean. </em>
<em>3. The Atlantic ocean. </em>
<em>4. The Indian ocean. </em>
On the other hand, Continents can be defined as very large landmasses or area of land typically surrounded and separated by water. It is divided into seven (7) main categories and these are;
<em>1. Africa. </em>
<em>2. Asia. </em>
<em>3. Antarctica. </em>
<em>4. South America. </em>
<em>5. North America. </em>
<em>6. Australia. </em>
<em>7. Europe. </em>
Continents differ in appearance from ocean basins because each has its own geologic history. Thus, a continent is less denser and comprise of a thick granite material while an oceanic basin is dense and an older basalt.
When a continent is compared with an oceanic crust, it was discovered that the continental crust is lighter in colour than the oceanic crust.
The action that President Thabo Mbeki never took is: punish apartheid leaders
Thabo Mbeki believed that punishing the apartheid leaders could only create a separation between his people. So, he decided to put the horrific history behind them and started to focus his effort in establishing a stronger economy, healthcare, and education.
Answer:
they spread throughout africa
Explanation:
Before Homo sapiens, Homo erectus had already spread throughout Africa and non-Arctic Eurasia by about one million years ago (see Out of Africa I). The oldest known evidence for anatomically modern humans (as of 2017) are fossils found at Jebel Irhoud, Morocco, dated about 300,000 years old.
