R3-1 World Population Growth

Experts predict the world’s population will continue to grow.

• deny
• hope
• expect
• know

No one knows how long our petroleum supplies will last.

• continue
• burn
• be needed
• remain hidden

Today, most of the world’s commercial energy comes from three non-renewable energy resources—petroleum, natural gas, and coal.

• resources that will last a long time
• expensive resources
• powerful resources
• resources that will run out

There were ____ as many people in the world in 1930 as there were in 1830.

• twice
• three times
• four times
• five times

Between 1960 and 2011, the population of the world ____.

• decreased
• more than doubled
• increase by less than a billion people
• grew three times larger

About ____ of the world's water is drinkable.

• half
• 97 percent
• a thirtieth
• 3 percent

About ___ of the Earth's land can be used for raising animals

• 11 percent
• 27 percent
• 34 percent
• 40 percent

The wind and the sun are _____.

• non-renewable energy resources
• renewable energy resources
• limited energy resources
• recycled energy resources

Developed countries use ______ commercial energy than the developing countries.

• a little more
• two times more
• three times more
• a lot more

The amount of ___ in the air has increased since 1960.

• fossil fuel
• hydrogen
• carbon dioxide
• natural resource