PS & CR Practice #1

What is the ultimate ORIGINAL source of energy for living things

• Sugar
• Sun
• Moon
• Carbon Dioxide

Which of the following is the correct equation for PHOTOSYNTHESIS?

• CO₂ + light energy + H₂O --> O₂ + Sugar

• CO₂ + sugar + H₂O --> O₂ + light energy

• _O2 + light + H₂O --> CO₂ + Sugar

• CO₂ + O₂ + H₂O --> Light+ Sugar

Which action would increase the amount of oxygen in a fish tank?

• adding more fish

• adding more plants

• placing food in the tank

• placing a water heater in the tank

Chloroplasts are...

• Structures of animal cells to produce ATP

• Organelles where waste is stored

• Specialized structures of plants where food is made

• Organelles where lipids are made

What are the products of photosynthesis?

• water and carbon dioxide

• oxygen and glucose

• oxygen and carbon dioxide

• oxygen and water

Which statement accurately describes an interaction between plants and animals?

• Animals release oxygen, required for plant survival.

• Plants provide humans with atmospheric nitrogen.

• Plants provide humans with carbon dioxide for respiration.

• Animals release carbon dioxide, required for photosynthesis.

What is photosynthesis?

• The process in which humans eat their food
• When a photographer takes a photo.
• To get your pictures from the photo lab.
• The process in which plants make their food.

How will cutting down forests affect the level of carbon dioxide in the atmosphere/

• It will decrease because of decreased cellular respiration.

• It will remain constant as respiring animals remove the carbon dioxide.

• It will increase because of decreased photosynthesis.

• It will decrease because of decreased photosynthesis.

Through which activity do animals get the carbon that is needed for their bodies?

• breathing

• running

• eating

• sleeping

In the human body, cellular respiration breaks down sugar molecules after they enter the cell. What results from this process?

• growth of bacteria

• release of energy

• activity of enzymes

• production of oxygen