Review part 5

Chlorine has 7 valence electrons. With what group of elements will chlorine most likely readily bond?

• Group one

• Group two

• Group 16

• Group 18

Which is the best example of chemical change?

• Butter melting

• Egg cooking

• Paper tearing

• Water evaporating

Which chemical equation best represents the Law of Conservation of Mass?

• 
• 
• 
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Which is most likely a major concern associated with burning fossil fuels?

• Burning fossils fuels can pollute the oceans

• Burning of fossil fuels can remove harmful chemicals from precipitation.

• Burning fossil fuels can remove carbon dioxide from the atmosphere

• Burning fossil fuels can produce smog, which can cause respiratory illness.

Which action shows concern for the environment with regards to the resources of the oceans?

• Developing technology which will allow for an increase in fish harvesting

• Allowing factories to release untreated wastewater into the oceans

• Filling in oceanfront wetlands in order to extend beachfront properties

• Setting limits on fish harvesting in the oceans

What effect does the water cycle have on the total amount of water on Earth?

• The total amount of water on earth is constantly increasing.

• The total amount of water on Earth is constantly decreasing.

• The total amount of water on Earth remaining relatively constant.

• The total amount of water on Earth changes due to periods of global warming and cooling.

Which characteristics of water quality provides the most information regarding the health of a water system?

• Clarity

• Temperature

• Concentration of heavy metal

• Presence of indicator

Where is the most of Earth’s freshwater located?

• In the clouds

• In the ice caps

• In the ocean

• In the ground

Which is most accurate way of determining the age of a fossil?

• Radioactive dating

• Relative dating

• Dating index fossils

• Dating the rock layers above the fossil

Which allows scientists to investigate what Earth’s climate was like over the past 740,000 years?

• Volcanic deposits

• Fossils

• Faults

• Ice cores