Photosynthesis and Energy Processes

The video tutorial explains how food is converted into energy through digestion and respiration, and how undigested food is excreted. It contrasts how plants and animals obtain energy, highlighting photosynthesis as the process by which plants synthesize food using light energy. The tutorial details the photosynthesis process, including the conversion of carbon dioxide and water into glucose and oxygen. An experiment is described to demonstrate oxygen evolution during photosynthesis, and a method to test for carbohydrates as a photosynthesis product is explained.

What is the process called that converts food into energy in our bodies?

• Photosynthesis

• Digestion

• Excretion

• Respiration

What happens to the food that is not digested in our bodies?

• It is used for growth

• It is excreted

• It is converted into energy

• It is stored as fat

Why don't plants need to eat food like animals do?

• They do not require energy

• They get energy from water

• They absorb nutrients from the soil

• They can synthesize their own food using light energy

What is the term for organisms that can synthesize their own food?

• Autotrophs

• Omnivores

• Carnivores

• Heterotrophs

What are the main components required for photosynthesis?

• Oxygen and glucose

• Carbon dioxide and water

• Chlorophyll and oxygen

• Nitrogen and sunlight

What is the role of chlorophyll in photosynthesis?

• It absorbs water

• It releases oxygen

• It captures sunlight

• It stores glucose

What is the term for the splitting of water molecules during photosynthesis?

• Hydrolysis

• Thermolysis

• Photolysis

• Electrolysis

What gas is released as a byproduct of photosynthesis?

• Oxygen

• Nitrogen

• Hydrogen

• Carbon dioxide

How can the presence of carbohydrates in a leaf be tested?

• With iodine reagent

• By measuring oxygen levels

• By checking for chlorophyll

• Using a pH indicator

What color change indicates the presence of starch when using iodine reagent?

• Green

• Blue

• Yellow

• Red