Environmental Science Mid Term

How is the burning of fossil fuels related to global warming?

• Cellular Respiration

• Fuels are hot

• Greenhouse effect

• Photosynthesis

Increased industrialization will most likely

• decrease available habitats

• increase environmental carrying capacity

• increase the stability of ecosystems

• decrease global warming

Which human activity would most likely deplete nonrenewable resources?

• use of natural enemies to eliminate insect pests

• development of wildlife refuges

• governmental restriction of industrial pollution

• increased use of fossil fuels

If I floss more, then I will have fewer cavities. What is the independent variable?

• Number of cavities

• Amount of flossing

• Type of floss used

• Amount of brushing

If I put on a higher factor sunscreen, then I will burn less. What is the dependent variable?

• Severity of sunburn

• Factor of sunscreen

• Time spent in the sun

• Weather conditions

The dependent variable is

• The variable that you change in an investigation

• The variable that you measure in an investigation

• A variable that you keep the same in an investigation

The independent variable is

• The variable that you change in an investigation

• The variable that you measure in an investigation

• A variable that you keep the same in an investigation

What is the purpose of controlled variables

• To control what happens in the investigation

• To make the investigation valid

• To make the investigation reliable

How is an investigation made valid?

• Ensuring it is reliable and precise

• Repeating the experiment

• Making sure it's a fair test

• Following the method

Having a variety of organisms in an ecosystem would be

• endangered

• Biological diversity

• ecosystem

• Abiotic