Science Practice Quiz 4

1. How did pollution get into the oceans?

They flowed there from other places

People dumped trash and other things in there

It was always there

Pollution entered the oceans primarily because of human activities such as dumping trash and other waste materials. These actions include improper disposal of plastic, chemicals, oil spills, and sewage. Human actions have significantly contributed to the pollution in the oceans, causing harm to marine life and ecosystems.

Explanation

Pollution entered the oceans primarily because of human activities such as dumping trash and other waste materials. These actions include improper disposal of plastic, chemicals, oil spills, and sewage. Human actions have significantly contributed to the pollution in the oceans, causing harm to marine life and ecosystems.

2. What is a water current?

Land surrounded by water

A lake

A narrow. fast moving river

A river

A water current refers to a narrow, fast-moving river. This is because a current is the flow of water in a specific direction, and rivers are known for their continuous movement. The term "narrow" indicates that the river is not wide but has a restricted width. The term "fast-moving" suggests that the water in the river is flowing swiftly, indicating a strong current. Therefore, the correct answer is "A narrow, fast-moving river."

Explanation

A water current refers to a narrow, fast-moving river. This is because a current is the flow of water in a specific direction, and rivers are known for their continuous movement. The term "narrow" indicates that the river is not wide but has a restricted width. The term "fast-moving" suggests that the water in the river is flowing swiftly, indicating a strong current. Therefore, the correct answer is "A narrow, fast-moving river."

3. What happens when surface currents get near land?

The land explodes

The currents change direction

The currents swallow up the land

When surface currents get near land, they experience a change in direction. This is because the presence of landmasses disrupts the flow of the currents, causing them to alter their course. This change in direction can be influenced by various factors such as the shape of the coastline, the depth of the water, and the interaction between the current and the land. The currents may deflect, split, or even form eddies as they encounter the land, resulting in a shift in their overall direction.

Explanation

When surface currents get near land, they experience a change in direction. This is because the presence of landmasses disrupts the flow of the currents, causing them to alter their course. This change in direction can be influenced by various factors such as the shape of the coastline, the depth of the water, and the interaction between the current and the land. The currents may deflect, split, or even form eddies as they encounter the land, resulting in a shift in their overall direction.

4. What did Native Americans call the Chesapeake Bay?

The Mother of Bays

The Mother of Waters

The Chesapeake Bay

The Native Americans called the Chesapeake Bay "The Mother of Waters" because it was a significant and revered body of water in their culture. The term "Mother" suggests that the bay was seen as a source of life and nourishment, providing sustenance and resources for the Native American communities that relied on it. The term "Waters" emphasizes the importance and vastness of the bay, highlighting its role as a central feature in their environment.

Explanation

The Native Americans called the Chesapeake Bay "The Mother of Waters" because it was a significant and revered body of water in their culture. The term "Mother" suggests that the bay was seen as a source of life and nourishment, providing sustenance and resources for the Native American communities that relied on it. The term "Waters" emphasizes the importance and vastness of the bay, highlighting its role as a central feature in their environment.

5. Which of these are cities that have water shortages often?

Austin, Texas

Berlin, Greece

Sacramento, California

Beijing, China

Beijing, China is the correct answer because it frequently experiences water shortages. Beijing is a highly populated city with limited water resources, and its demand for water exceeds its supply. Factors such as rapid urbanization, pollution, and overexploitation of groundwater contribute to the water scarcity issue in Beijing. The city has implemented various measures to address this problem, including water conservation campaigns and the construction of water diversion projects.

Explanation

Beijing, China is the correct answer because it frequently experiences water shortages. Beijing is a highly populated city with limited water resources, and its demand for water exceeds its supply. Factors such as rapid urbanization, pollution, and overexploitation of groundwater contribute to the water scarcity issue in Beijing. The city has implemented various measures to address this problem, including water conservation campaigns and the construction of water diversion projects.