Atmosphere

The atmosphere is a layer of gases that surrounds the Earth and is held in place by gravity. It is composed of different gases, mainly nitrogen (about 78%) and oxygen (about 21%), with trace amounts of other gases such as carbon dioxide, argon, and water vapor.

The atmosphere is divided into several layers, including the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer has its own unique characteristics and plays a vital role in supporting life on Earth.

The atmosphere serves several important functions, including protecting life on Earth from harmful solar radiation, regulating the planet's temperature through the greenhouse effect, and providing the air we breathe.

Human activities, such as the burning of fossil fuels and deforestation, have led to an increase in greenhouse gases in the atmosphere, contributing to global climate change and other environmental issues.

Understanding the composition and dynamics of the atmosphere is crucial for addressing environmental challenges and ensuring the well-being of our planet and its inhabitants.

◂Math Worksheets and Study Guides Third Grade. Commutative Property

The resources above cover the following skills:

Number and Operations (NCTM)

Understand meanings of operations and how they relate to one another.

Understand and use properties of operations, such as the distributivity of multiplication over addition.

Compute fluently and make reasonable estimates.

Develop fluency in adding, subtracting, multiplying, and dividing whole numbers.

Select appropriate methods and tools for computing with whole numbers from among mental computation, estimation, calculators, and paper and pencil according to the context and nature of the computation and use the selected method or tools.

Algebra (NCTM)

Represent and analyze mathematical situations and structures using algebraic symbols.

Identify such properties as commutativity, associativity, and distributivity and use them to compute with whole numbers.

Use mathematical models to represent and understand quantitative relationships.

Model problem situations with objects and use representations such as graphs, tables, and equations to draw conclusions.

Grade 3 Curriculum Focal Points (NCTM)

Number and Operations and Algebra: Developing understandings of multiplication and division and strategies for basic multiplication facts and related division facts

Students understand the meanings of multiplication and division of whole numbers through the use of representations (e.g., equal-sized groups, arrays, area models, and equal 'jumps' on number lines for multiplication, and successive subtraction, partitioning, and sharing for division). They use properties of addition and multiplication (e.g., commutativity, associativity, and the distributive property) to multiply whole numbers and apply increasingly sophisticated strategies based on these properties to solve multiplication and division problems involving basic facts. By comparing a variety of solution strategies, students relate multiplication and division as inverse operations.

Atmosphere

[Atmosphere] Related Worksheets and Study Guides:

◂Math Worksheets and Study Guides Third Grade. Commutative Property

The resources above cover the following skills: