Earth Systems: Unit 2, Lessons 1-3

What is the atmosphere?

• all of the water found on Earth

• all of the living things found on Earth

• a mixture of gases that surrounds Earth

• the rock, soil, and sediment on Earth's surface

Answer explanation

The atmosphere is defined as a mixture of gases that surrounds Earth, primarily composed of nitrogen and oxygen. This distinguishes it from water, living things, and geological materials, making the correct choice clear.

Water that flows back to the ocean is called

• runoff

• groundwater

• condensation

• Evaporation

Answer explanation

Water that flows back to the ocean is known as runoff. It occurs when precipitation or melting snow moves over the land and returns to bodies of water, including oceans, rivers, and lakes.

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What is created when warm air rises and cool air sinks?

• faster plane travel

• mircoslopes

• convection currents

• crops will die

Answer explanation

When warm air rises, it creates an area of lower pressure, while cool air sinks to fill that space, resulting in convection currents. This process is fundamental in atmospheric dynamics and heat transfer.

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How is climate different than weather?

• Climate describes conditions over a long period of time whereas weather is for a short period.

• Climate describes conditions on land whereas weather describes conditions in the atmosphere.

• Climate describes storms whereas weather describes everyday conditions.

• Climate describes conditions all over Earth whereas weather describes only local conditions.

Answer explanation

The correct choice highlights that climate refers to long-term atmospheric conditions, while weather pertains to short-term variations. This distinction is crucial for understanding how we describe environmental changes over time.

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Weather changes at fronts. Fronts form where?

• air is heated near Earth’s surface.

• wind flows into a mountain.

• water flows across Earth’s surface.

• two air masses meet.

Answer explanation

Fronts form when two air masses meet, leading to changes in weather. This interaction causes variations in temperature, humidity, and wind, which are characteristic of weather fronts.

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Cold water currents start near the poles. They carry cold water towards the equator?  

• true

• false

Answer explanation

True. Cold water currents originate near the poles and flow towards the equator, transporting cold water along their path. This process is essential for regulating global climate and ocean temperatures.

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Clouds form when Earth’s 

• climate or weather changes very quickly.

• geosphere interact with the biosphere.

• hydrosphere interacts with the atmosphere.

• precipitation does not go into the ocean.

Answer explanation

Clouds form when water vapor from the hydrosphere interacts with the atmosphere, leading to condensation. This process is essential for cloud formation, making 'hydrosphere interacts with the atmosphere' the correct choice.

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Ocean currents have an important role in determining the ____ in an area.

• climate

• wind

• landforms

• clouds

Answer explanation

Ocean currents significantly influence the climate of an area by regulating temperatures and weather patterns. They transport warm and cold water, affecting local climates, making 'climate' the correct choice.

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Winds that blow more often from one direction than from any other are called

• uneven winds

• prevailing winds

• surface winds

• current winds

Answer explanation

Winds that consistently blow from a specific direction are known as prevailing winds. This term describes the dominant wind patterns in a region, making 'prevailing winds' the correct choice over the other options.

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On a hot summer day, you observe water droplets forming on the outside of a glass that holds your cold drink. Which of Earth’s systems are interacting to form these water droplets?

• biosphere and atmosphere

• atmosphere and hydrosphere

• geosphere and biosphere

• atmosphere and geosphere

Answer explanation

The water droplets form due to condensation, which occurs when water vapor in the atmosphere cools and turns into liquid. This interaction between the atmosphere (air) and hydrosphere (water) explains the phenomenon observed.

Tags

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