Understanding Fall Foliage and Photosynthesis

What is a deciduous tree?

• A tree that keeps its leaves all year round

• A tree that loses its leaves in autumn

• A tree that produces fruit in winter

• A tree that grows in tropical climates

What role does chlorophyll play in leaves?

• It stores nutrients for the tree

• It makes leaves red

• It helps leaves absorb water

• It gives leaves their green color

What is the main purpose of photosynthesis in plants?

• To produce oxygen

• To change leaf colors

• To absorb carbon dioxide

• To create glucose for growth

Which chemical is responsible for the yellow and orange colors in leaves?

• Glucose

• Chlorophyll

• Carotenoids

• Anthocyanins

What do anthocyanins add to the color of leaves?

• Yellow

• Red

• Blue

• Green

How do trees store nutrients during the fall?

• In their flowers

• In their leaves

• In their branches

• In their roots

What happens to chlorophyll as the seasons change?

• It breaks down and is stored in the roots

• It increases in the leaves

• It turns into glucose

• It evaporates into the air

Why do leaves appear brown and crispy before falling?

• They are covered in dust

• They have lost all their nutrients

• They are damaged by insects

• They are full of chlorophyll

What triggers the change in leaf color during fall?

• Decrease in soil nutrients

• Increase in rainfall

• Decrease in temperature and daylight

• Increase in sunlight

What happens to the nutrients stored in the roots during spring?

• They are converted into flowers

• They remain unused

• They are lost in the soil

• They are used to grow new leaves