UNIT 1 NATURE OF SCIENCE AND BIOGEOCHEMICAL CYCLES

WHAT POTENTIAL LONG TERM CONSEQUENCE EMERGES FROM CONTINUOUS DISRUPTION OF BIOGEOCHEMICAL CYCLES

• TEMPORARY ECOSYSTEM CHANGES

• Localized species adaptation

• Minimal environmental impact

• Potential global ecosystem collapse

Which of the following is NOT one of the processes that occurs during the nitrogen cycle?

• nitrification
• nitrogenation
• denitrification
• nitrogen fixation

Accoring to the following graph, what two activities take up 25% of a teenager's day ?

• eating and using the phone
• attending school and studying
• watching tv and using the phone
• eating and watching tv

Fossil fuels form in which cycle?

• Water
• Carbon
• Nitrogen
• Phosphorus

Nitrogen is essential to life because

• It is needed for building the proteins needed for cells.
• It is the molecule around which all the molecules of life are built.
• It is the most common element.

Where does some water from the water cycle collect underground?

• Aqueducts
• Aquatic parks
• Aquifers
• Aquariums

Precipitation that didn’t get absorbed into the soil and made its way downhill along a surface of land is called

• Landslide
• Flood
• Runoff
• Ice-cap

Plants get nitrogen from

• .Breathing it in through their leaves from the atmosphere
• Absorbing it through roots from the ground
• Cellular Respiration

Which statement about decomposition is most correct?

• .Bacteria and fungi carry out the photosynthesis needed for breaking down proteins
• Bacteria put oxygen back into the atmosphere.
• Bacteria break down organic matter to nitrates that plants can use.

Based on the diagram above, which of the following major storage reservoirs of carbon, stored in the form of carbon dioxide, is not represented in this diagram?

• Algae
• Soil bacteria
• The Moon
• The ocean