Atmospheric Pressure
Atmospheric pressure is the force exerted by the weight of the air in the Earth's atmosphere. It is also known as air pressure. Atmospheric pressure decreases as altitude increases, and it is an important factor in weather patterns and the functioning of the Earth's ecosystem.
Factors Affecting Atmospheric Pressure
- Altitude: As altitude increases, atmospheric pressure decreases. This is because there is less air above, exerting less force downward.
- Temperature: Warmer air has lower density, resulting in lower pressure, while colder air has higher density and higher pressure.
- Humidity: Moist air is less dense than dry air, leading to lower pressure in humid conditions.
Units of Measurement
Atmospheric pressure is often measured in units such as millibars (mb), inches of mercury (inHg), or kilopascals (kPa).
Effects of Atmospheric Pressure
Changes in atmospheric pressure can affect weather patterns, including the formation of high and low-pressure systems, as well as influencing human and animal physiology at high altitudes.
Study Guide
- What is atmospheric pressure?
- How does altitude affect atmospheric pressure?
- What are the units of measurement for atmospheric pressure?
- How does temperature and humidity affect atmospheric pressure?
- What are the effects of atmospheric pressure on weather patterns?
Understanding atmospheric pressure is crucial for comprehending weather phenomena and its impact on various aspects of life on Earth.
.◂Science Worksheets and Study Guides Third Grade. Relationships among living things
Study Guide
Relationships among living things 
Activity Lesson
Relationships Among Living Things Worksheet/Answer key
Relationships among living things Worksheet/Answer key
Relationships among living things Worksheet/Answer key
Relationships among living things Worksheet/Answer key
Relationships among living things Vocabulary/Answer key
Relationships among living things Vocabulary/Answer key
Relationships among living things
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
From Molecules to Organisms: Structures and Processes
Create representations to explain the unique and diverse life cycles of organisms other than humans (e.g., flowering plants, frogs, butterflies), including commonalities such as birth, growth, reproduction, and death.
Unity and Diversity
Construct an argument from evidence to explain the likelihood of an organism’s ability to survive when compared to the resources in a certain habitat (e.g., freshwater organisms survive well, less well, or not at all in saltwater; desert organisms survive well, less well, or not at all in woodlands).
Create models that illustrate how organisms and their habitats make up a system in which the parts depend on each other.