Science Plants Part 1 Leaves Basic parts of

Science- Plants Part 1: Leaves

Basic parts of a plant • Leaves absorbs sunlight to make food for the plant (glucose) • Roots holds the plant in place, absorbs minerals & water • Flowers attract pollinators to help with pollination • The stem holds up the leaves and helps transport things from one part of the plant to another

Intro to leaves • There are different sizes and shapes of leaves • A blade of grass, a pine needle and a cactus thorn are all kinds of leaves • There are 2 MAJOR types of leaves

Intro to leaves • SIMPLE type of leaves • 1 blade: flat and broad part to capture sunlight • 1 petiole: Supports the blade and turns it to the sun • Examples: Grass and on most trees Petiole Blade

Intro to leaves • COMPOUND type of leaves • 1 petiole with many LEAFLETS • Examples: Ferns, evergreens

Main jobs of leaves • Leaves let plants make FOOD • There is something that happens in leaves called PHOTOSYNTHESIS • Leaves take energy from the sun, carbon dioxide from the air and water from the soil • The leaves make OXYGEN and GLUCOSE

Main jobs of leaves - PHOTOSYNTHESIS

Leaves on the outside Green color = chlorophyll traps sunlight Broad shape helps to collect sunlight easily Veins and stem helps carry water Waxy and slippery surface waterproofs the top

Leaves on the inside • Leaves have tiny holes inside on the bottom • These holes are called STOMATA • Stomata help carbon dioxide go into the leaf and help oxygen come out of the leaf

Leaves on the inside • Stomata can open and close • They open and close when cells around them fill up or empty (water) • Full- opens • Empty- closes • These cells are called GUARD CELLS

BILL! BILL! • http: //www. youtube. com/watch? v=VH 3 IFUDk Gt 8