IB ESS

What is a limiting factor?

• any factor that helps a living thing grow

• the opposite of multiplication

• any factor that limits population growth

• any factor that makes a population grow

Roughly what percentage of incoming solar energy is converted into chemical energy by producers?

• 10 percent

• between 5 and 20 percent

• 1 percent

• 99 percent

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following processes is also known as ammonification

• nitrogen fixation

• nitrification

• assimilation

• mineralization

Tags

NGSS.MS-LS2-3

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water

• Atmosphere

• Sun

• Air

How do living organisms return carbon to the atmosphere in the carbon cycle?

• respiration and photosynthesis

•  decomposition and respiration

What are fossil fuels made from?

• Plants and animals that are buried underground for millions of years.

• They absorb it from the atmosphere.

• Water

• Wind

Carbon can be found in...

• The atmosphere

• Soil

• Fossil fuels

• All of the above

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Carbon dioxide is created by 

• Burning fossil fuels 

• Cellular respiration

• Decomposing organic matter

• All answers are correct

Tags

NGSS.MS-LS2-3

Which nitrogen cycle process is occurring when plant roots absorb ammonium ions and nitrate ions for use in making molecules such as DNA, amino acids, and proteins?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

Which of these correctly shows the reservoirs where most of Earth's carbon atoms and nitrogen atoms are residing at any given time?

• 
• 
• 
• 
• 

Tags

NGSS.MS-ESS2-1

NGSS.MS-LS2-3