Which is an example of an effect caused by Earth's magnetism?

A) Earth's magnetic field causes earthquakes.

B) Earth's magnetic poles repel the continents.

C) Earth's magnetic field causes volcanic eruptions.

D) Earth's magnetic poles attract the poles of a compass needle.

Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.

In general, are there any major differences that you can see? explain