Diameter
The diameter of a circle is a straight line that passes through the center of the circle and touches two points on the circle. It is the longest distance you can measure across a circle. The diameter is a fundamental property of a circle and is used to calculate other important measurements such as the circumference and area of a circle.
Key Points to Remember:
- The diameter is the distance across a circle through its center.
- The diameter is twice the length of the radius of a circle. In other words, diameter = 2 * radius.
- The formula to calculate the diameter of a circle is: diameter = 2 * radius.
- The diameter is used to calculate the circumference and area of a circle.
- The diameter can be used to divide a circle into two equal halves, known as semicircles.
Study Guide Questions
- What is the definition of the diameter of a circle?
- How is the diameter related to the radius of a circle?
- What is the formula to calculate the diameter of a circle?
- How is the diameter used to calculate the circumference of a circle?
- How is the diameter used to calculate the area of a circle?
◂Science Worksheets and Study Guides Fourth Grade. Organ systems
Study Guide
Organ systems 
Worksheet/Answer key
Organ systems Worksheet/Answer key
Organ systems Worksheet/Answer key
Organ systems Vocabulary/Answer key
Organ systems Vocabulary/Answer key
Organ systems Vocabulary/Answer key
Organ systems Vocabulary/Answer key
Organ systems Vocabulary/Answer key
Organ systems
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE (NGSS)
From Molecules to Organisms: Structures and Processes
Students who demonstrate understanding can:
Construct an argument that plants and animals have internal and external structures that function to support survival, growth, behavior, and reproduction.