What is the Doppler Effect?

energy = ? × time

Using the formula: energy = power × time ,solve:

How much energy is transferred by a 500 W electric drill in 30 seconds?

When coal is burned in a coal-burning station its chemical energy is transferred to what type of energy?

What is the Carbon Cycle?

What are the optimum conditions for the decay to occur in the carbon cycle?

Define the Big Bang

Besides Charles Darwin who is also credited with outlining the theory of evolution?

Complete: Inner core, outer core, ???, Crust

Nobel prize physicist Marie Curie is best know for her pioneering research on what?