Energy transfer and cycles of matter

During photosynthesis, what gas do plants release?

• oxygen
• carbon dioxide
• water
• nitrogen

Photosynthesis is important because....

• plants need air to breathe
• it makes the plants green
• it is the process by which plants make their own food
• without it the Earth would all be a desert

How do plants obtain energy for photosynthesis?

• Water is absorbed through the flower
• Soil is absorbed by the roots
• Oxygen is absorbed though the stem
• Sunlight is absorbed by the leaves

Which of the following is produced during cellular respiration?

• Protein
• Oxygen
• Carbon dioxide
• Glucose

The diagram shows the processes of photosynthesis and cellular respiration in relation to each other.  Which statement correctly describes the relationship between photosynthesis and cellular respiration? 

• The reactants and products of both processes are the same. 
• Photosynthesis and cellular respiration occur in all organisms. 
• Products of photosynthesis form the reactants for cellular respiration. 
• All ATP produced during photosynthesis is utilized during cellular respiration. 

How are photosynthesis and cellular respiration related?

• They are the same reaction but backwards

• They both use oxygen to make something

• they both use sugar to make something

• They both need sunlight

What is A?

• Evaporation
• Condensation
• Precipitation
• Runoff

What is B?

• Evaporation
• Condensation
• Precipitation
• Runoff

Organisms that break down dead plants & animals and release nitrogen back into atmosphere...

• bacteria
• plants
• animals
• producers

After plants and animals contain nitrogen, what puts it back into atmosphere and soil?

• decomposition
• precipitation
• condensation
• bacteria