Write two causes of earthquake

Tectonic Movements & Volcanic Eruptions

An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

In California there are two plates - the Pacific Plate and the North American Plate

the answer is true!                                          

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer