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These three short online lessons discuss asteroids, comets and meteors.

This YouTube video delves into the impact that tourism can have on a country's economy.

This YouTube video delves into the impact that tourism can have on the environment.

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

Other objects in the solar system are discussed in this online textbook viz. asteroids, meteorites, comets and dwarf planets.

In this section, you will:

• Evaluate square roots.
• Use the product rule to simplify square roots.
• Use the quotient rule to simplify square roots.
• Add and subtract square roots.
• Rationalize denominators.
• Use rational roots.

This YouTube video explains how river basins are formed.

This 20 minute YouTube video explores the differences between small and large scale agriculture and the uses of each.

Exercises requiring expressions to be re-written in 'Simple Radical Form'.

This YouTube documentary highlights the ecological and socio-economic importance of the Tana River Basin in Kenya.