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There are some key words that you need to know for circles: radius, circumference, diameter, sector, segment, tangent, chord and arc. In this video you will discover what they all mean.

This video discusses the topic of circles.

Outcomes:

• Describe how the concept of density relates to an object's mass and volume.
• Explain how objects of similar mass can have differing volume, and how objects of similar volume can have differing mass.
• Explain why changing an object's mass or volume does not affect its density (ie, understand density as an intensive property).
• Measure the volume of an object by observing the amount of fluid it displaces.
• Identify an unknown material by calculating its density and comparing to a table of known densities.

This video explains the equation of a circle.

Clarifying some points on evolution and intelligent design.

Use the dynamic worksheet to practice simplifying expressions with fractional exponents, rewriting them as radicals.

Overview of fertilisation and early human development. From conception leading to a zygote to blastocyst, embryo and fetus.

Three activities which illustrate the law of exponents.

This is a simple video which describes how indices problems are solved using simplified laws.