7th Grade Science Test- Topic 7

What is a natural source of air pollution

• volcanoes
• carbon monoxide
• smog
• ozone layer

Automoblies contribute to air pollution by

• increase in methane
• The resources are now being replaced faster than they are being used.
• Political conflicts occur over control of these resources.

Which of the following are found is the best definition for population

• group of organisms that can mate with each other & produce offspring
• all the members of one species living in a particular area
• community of organisms that lives in a specific area

Why are coal and petroleum resources not commonly found across the planet?

Explain what ecology is in your own words

Which of the following is directly involved in transforming the remains of organisms into fossil fuels?

• pressure
• precipitation
• sunlight
• wind

Which of the following renewable energy resources comes from underground?

• geothermal energy
• hydropower
• wind power
• solar power

What areas on Earth are worst suited for using solar energy to generate electricity?

Gold is a valuable mineral that is found underground. It is brought closer to the surface, where it can be mined, by volcanic activity. Why do you think gold is not evenly distributed on Earth?

Which of the following statements about minerals and ores is true?

• Minerals are deposits of valuable ores.
• Minerals are products that are made from ores.
• All ores are minerals, but not all minerals are ores.
• Minerals form from solutions, but ores form from volcanoes