Photosynthesis and Plant Functions

The lecture covers the importance of the sun as a natural resource, focusing on its role in providing energy and supporting life on Earth. It explains how sunlight is crucial for photosynthesis in plants, which in turn supports the food chain. The lecture also discusses various uses of solar energy, such as solar cookers, dryers, and cells. The importance of sunlight in maintaining Earth's temperature and enabling visibility is highlighted. The session concludes with a detailed explanation of the photosynthesis process and assignment instructions.

What is the main source of energy on Earth?

• The Moon

• The Sun

• The Stars

• The Ocean

Which process do plants use to make food with the help of sunlight?

• Photosynthesis

• Evaporation

• Transpiration

• Respiration

What devices work with the help of solar energy?

• Nuclear reactors

• Hydroelectric dams

• Solar cookers and dryers

• Wind turbines

How does the sun help us see things around us?

• By heating the atmosphere

• By causing rain

• By providing light

• By reflecting off the moon

What would happen to Earth without sunlight?

• It would have more life

• It would be covered in water

• It would be a dark and cold place

• It would be a bright and warm place

What are the essential components needed for photosynthesis?

• Minerals, sunlight, and oxygen

• Sunlight, carbon dioxide, and water

• Oxygen, nitrogen, and sunlight

• Water, soil, and oxygen

What does 'photo' mean in the word photosynthesis?

• Plant

• Light

• Water

• Growth

What do plants take in from the soil for photosynthesis?

• Nitrogen and phosphorus

• Sunlight and heat

• Water and minerals

• Carbon dioxide and oxygen

What is the function of the stem in plants?

• To absorb sunlight

• To store food

• To transport water and minerals

• To produce seeds

What do the tiny holes in leaves do?

• Capture sunlight

• Store water

• Absorb carbon dioxide

• Release oxygen