Global Warming

Question 1

Scientists have concluded that global warming is taking place and that it is caused at _____ partly by human activities.

Answer 1

least

Question 2

Natural events such as _______ _______ and ______ ____ may also be part of the cause of global warming. Like some human activities, they may increase the concentration of what in the atmosphere.

Answer 2

volcanic eruptions and forest fires. Greenhouse gases

Question 3

A worldwide increase is called global warming. Define it.

Answer 3

Human activities are generating more greenhouse gases, so many scientists have concluded that more heat is being trapped. This means that Earth’s surface temperature will continue to rise.