Exploring Earth's Atmosphere and Water Cycle

Front

Primary gas in Earth's atmosphere

Back

Nitrogen

Answer explanation

The primary gas in Earth's atmosphere is nitrogen, which makes up about 78% of the atmosphere. Oxygen, while important for life, constitutes only about 21%. The other gases, including carbon dioxide and argon, are present in much smaller amounts.

Tags

DOK Level 1: Recall

Front

Layer of atmosphere with ozone

Back

Stratosphere

Answer explanation

The ozone layer is located in the stratosphere, which is the second layer of Earth's atmosphere. It plays a crucial role in absorbing harmful ultraviolet radiation from the sun.

Tags

DOK Level 1: Recall

Front

Temperature change from troposphere to stratosphere

Back

Decreases, then increases

Answer explanation

As you move from the troposphere to the stratosphere, the temperature decreases in the troposphere due to altitude, but then it increases in the stratosphere because of the absorption of UV radiation by the ozone layer.

Tags

DOK Level 2: Skill/Concept

Front

Role of Earth's gravity in water cycle

Back

Pulls precipitation to the ground

Answer explanation

Earth's gravity plays a crucial role in the water cycle by pulling precipitation, such as rain and snow, to the ground. This force ensures that water returns to the surface, replenishing rivers, lakes, and groundwater.

Tags

DOK Level 2: Skill/Concept

Front

Process in water cycle driven by Sun's energy

Back

Evaporation

Answer explanation

Evaporation is the process in the water cycle that is directly driven by the Sun's energy, as it heats water, causing it to change from liquid to vapor. This is essential for the continuation of the water cycle.

Tags

DOK Level 1: Recall

Front

Effect of Low Pressure on Weather

Back

Leads to stormy weather

Answer explanation

Low pressure systems are associated with rising air, which can lead to cloud formation and precipitation, resulting in stormy weather. This makes 'Low pressure can lead to stormy weather' the correct choice.

Tags

DOK Level 3: Strategic Thinking

Front

Temperature difference: Equator vs. Poles

Back

Angle of sunlight

Answer explanation

The main reason for the temperature difference between the equator and the poles is the angle of sunlight. At the equator, sunlight strikes more directly, leading to higher temperatures, while at the poles, sunlight is spread over a larger area, resulting in cooler temperatures.

Tags

DOK Level 2: Skill/Concept

Front

Process of water vapor turning into liquid water

Back

Condensation

Answer explanation

The process by which water vapor turns into liquid water in the atmosphere is called condensation. This occurs when water vapor cools and changes back into liquid, forming clouds and precipitation.

Tags

DOK Level 1: Recall

Front

Atmosphere's effect on climate

Back

Determines solar energy absorption

Answer explanation

The composition of the atmosphere affects the Earth's climate by determining how much solar energy is absorbed. Greenhouse gases trap heat, influencing temperature and climate patterns.

Tags

DOK Level 3: Strategic Thinking

Front

Closest layer to Earth's surface

Back

Troposphere

Answer explanation

The troposphere is the lowest layer of Earth's atmosphere, extending from the surface up to about 8-15 kilometers. It contains most of the atmosphere's mass and is where weather occurs, making it the closest layer to Earth's surface.

Tags

DOK Level 1: Recall