5. How did they keep slaves fit?a. They made them dance on deck.
b. They ran on a wheel.
c. They did jumping jacks and ran races.
d. They jogged around the deck​

Answer:

Evolution of Atmosphere

Explanation:

• The first atmosphere consists of gases in solar nebular, Primarily hydrogen-like found in gaseous planets like Jupiter, Saturn and notably water vapor. This was characterized as the primary atmosphere of the earth.

• The secondary atmosphere was formed by the outgassing from volcanoes, supplemented by the bombardment of the asteroid, carbon dioxide and nitrogen gases i.e about 3.4 billion years ago.  

• In the late Archean period oxygen-containing atmosphere was developed some 2.7 billion years ago.

• The third,  atmosphere was due to the constant rearrangement of plate tectonics influencing the long term evolution of the atmosphere, the amount of oxygen in the atmosphere was fluctuating around 600 million years ago.

• After which the atmosphere came to be divided into various zones such as the Tropos, Stratos, Mesos, Thermos, and Exosphere.  Such formation was unique as the earth is close to the sun and solar storms drove away much of the gases and regular heating and cooling lead to the formation of the earth what it is today.  

Answer: Erosion can be harmful to a person's property, causing a negative effect since the person must have paid for the land and the risk of injury if it forms a manhole.

Explanation:

Hope this helps!

Today, we know that the continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics. The continents are still moving today. ... As the seafloor grows wider, the continents on opposite sides of the ridge move away from each other.

Answer:

a. Humans build roads, which prevents rainwater from replenishing aquifers.

Explanation:

This is because an aquifer is a body of rock that holds water or ground water and can readily transmit this water to Wells and springs. But human activities like building of roads has affected this. During road construction, rocks are broken down and ground water are depleted, as the roads are built, rain water will not be able to sink down to the ground rather will be on the tilled road which prevent it from getting to aquifer.

Answer:

Explanation:

Ecology: It is the discipline of biology. It studies the interaction between the organisms and their interaction with their non-living physical environment.  It suggests that what factors influence the distribution and abundance of organisms.

Ecosystem: It is a biotic community in which living beings interact with their non-living physical environment. In other words the ecosystem is a place where living beings (biotic factors) interact with the non-living beings (abiotic factor).

Organism: An organism is an individual which belongs to a particular species or life form. An organism perform functions necessary to survive. It exhibit features of living being. The example of organism includes the plants, animals, fungi, and others.

Population: It is a group of members of the same species which are capable of reproducing and producing viable fertile offsprings. The population may vary in functional and morphological forms.

Community: A community is a group of two or more distinct species. These species interact among themselves so as to survive and performing functional roles in the ecosystem. For example, plants provide food to animals in return the animals disperse the seeds of the animals.