6 Topic 2 Lesson 1 and 2

David, Noah, and Aria are studying the role of solar energy in Earth's systems and the atmosphere. They are discussing how solar energy affects our planet. What conclusion do they reach?

• David suggests that it warms the air through conduction.

• Noah thinks it creates distinct layers in the atmosphere.

• Aria believes it causes changes in air pressure.

• They all agree that it provides most of the energy for Earth's systems.

Henry, Anika, and Evelyn are on a school trip to a space center. They are learning about different layers of the atmosphere. They are asked, 'What is the main characteristic of the thermosphere?'

• It protects Earth from meteoroids.

• It absorbs radiation from the sun.

• It contains the most ozone.

• It is Earth's boundary with space.

Which layer of the atmosphere is closest to Earth's surface and contains 80% of the atmosphere's weight?

• Mesosphere
• Troposphere
• Stratosphere
• Thermosphere

What is the definition of relative humidity?

• The amount of water vapor in the air
• The amount of water vapor in the air compared to the maximum amount the air can hold at a particular pressure
• The amount of water vapor in the air compared to the maximum amount the air can hold at a particular temperature
• The amount of water vapor compared to the maximum amount the air can hold

Which of the following is NOT a phase of the water cycle that involves water vapor?

• Precipitation
• Evaporation
• Transpiration
• Condensation

What is the definition of evaporation?

• The process by which water molecules escape into the air due to liquid molecules being heated by the sun

• The process by which water vapor changes into liquid water
• The process by which water vapor changes directly into ice crystals
• The process by which water enters the atmosphere through plants

Which of the following is NOT a use of relative humidity in weather forecasting?

• To understand how the air feels
• To measure the amount of precipitation
• To determine the amount of water vapor in the air
• To predict the likelihood of fog formation

What is the difference between humidity and relative humidity?

• Humidity and relative humidity are not related
• Humidity is a measure of the amount of water vapor compared to the maximum amount the air can hold, while relative humidity is a measure of the amount of water vapor in the air
• Humidity is a measure of the amount of water vapor in the air, while relative humidity is a measure of the amount of water vapor compared to the maximum amount the air can hold at a particular temperature.
• Humidity and relative humidity are the same thing

David, Elijah, and Mason are studying the water cycle for their science project. They listed down some processes involved in the water cycle. Which of the following is NOT a process they should include?

• Condensation

• Transpiration

• Photosynthesis

• Evaporation

The process by which water vapor changes into liquid water is _____.