Chemistry and Matter Review

What is the primary role of chlorophyll in photosynthesis?

• To absorb carbon dioxide

• To absorb light energy

• To release oxygen

• To produce glucose

Which of the following is a product of photosynthesis?

• Carbon dioxide

• Water

• Oxygen

• Nitrogen

During cellular respiration, glucose is broken down to release energy. What is the main byproduct of this process?

• Oxygen

• Carbon dioxide

• Nitrogen

• Chlorophyll

Which of the following best describes cellular respiration?

• Conversion of light energy into chemical energy

• Breakdown of food to release energy

• Absorption of water and minerals

• Production of chlorophyll

What is the main purpose of the carbon cycle in an ecosystem?

• To produce oxygen

• To transfer energy and matter

• To absorb sunlight

• To create water

Which of the following processes is part of the carbon cycle?

• Photosynthesis

• Evaporation

• Precipitation

• Erosion

The Law of Conservation of Mass states that mass is:

• Created during chemical reactions

• Destroyed during physical changes

• Conserved in both physical and chemical changes

• Variable depending on the reaction

Which of the following is an example of the Law of Conservation of Mass?

• Burning wood and losing mass

• Dissolving sugar in water and maintaining mass

• Melting ice and gaining mass

• Rusting iron and losing mass

Which statement best describes the Law of Conservation of Energy?

• Energy can be created and destroyed

• Energy is always lost in chemical reactions

• Energy is conserved and can change forms

• Energy is only conserved in physical changes

Which of the following provides evidence for the Law of Conservation of Mass in a closed system?

• Mass increases after a chemical reaction

• Mass decreases after a physical change

• Mass remains constant after a chemical reaction

• Mass is unpredictable after a reaction