Photosynthesis Regents

A student notices pairs of cells with an opening on the bottom of a leaf while looking it under the microscope. The main purpose of these openings and the cells around them is

• removing excess sugars

• synthesis of carbon dioxide

• regulating gas exchange

• purification of water

a student placed a test tube containing a plant near a light source. He then counted the number of bubbles released by the plant in 1 minute. The gas that was produced was most likely

• carbon dioxide

• oxygen

• nitrogen

• all of these

Tags

NGSS.MS-LS1-6

The level of carbon dioxide in our atmosphere has been increasing dramatically. It has been said that growing green plants would help slow this increase. The best explanation for this is that plants

• serve as food for herbivores

• serve as a nonrenewable resource

• remove carbon dioxide from the atmosphere during respiration

• remove carbon dioxide from the atmosphere during photosynthesis

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

the 2 diagrams represent a sugar molecule and a fat molecule that are used by living organisms. Which statement best describes these 2 molecules?

• sugar molecules are inorganic and fat molecules are organic

• sugar molecules are organic and fat molecules are inorganic

• energy for life process can be stored in the chemical bonds of both molecules

• energy for life processes can be stored wihin the chemical bonds on sugar molecules only

Tags

NGSS.MS-LS1-7

over time, a tree that once had a total mass of 300g increased in mass to 3000 kg. This increase in mass comes mostly from

• soil that all plants need to grow

• oxygen that enters through the leaf openings

• chloroplasts that enter the roots and move to the leaves

• carbon dioxide that enters through the leaf openings

Tags

NGSS.MS-LS1-6

Which of the following is the correct equation for PHOTOSYNTHESIS?

• CO₂ + light + H₂O --> O₂ + Sugar
• CO₂ + sugar + H₂O --> O₂ + light
• _O2 + light + H₂O --> CO₂ + Sugar
• CO₂ + O₂ + H₂O --> Light+ Sugar

Tags

NGSS.MS-LS1-6

Which organisms perform Photosynthesis?

• Only Autotrophs
• Only Heterotrophs
• Autotrophs and Heterotrophs

Tags

NGSS.MS-LS1-6

What is the pigment in chloroplasts that performs photosynthesis?

• Chlorosynthesis
• Chlorophyll
• ADP
• Electron Transport

Tags

NGSS.MS-LS1-6

Which gas is removed from the atmosphere during photosynthesis?

• hydrogen
• oxygen
• nitrogen
• carbon dioxide

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What are the products of photosynthesis?

• water and carbon dioxide
• oxygen and glucose
• oxygen and carbon dioxide
• oxygen and water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3