Energy from Plants

Chapter 2

Lesson 1

What are the plants’ characteristics?

• Plants are made up of many cells.• These cells all do different jobs in the plant• Plants have special cells they use to

absorb water and nutrients from the soil• Plants contain Chlorophyll, which makes

them green

How Plants Make Food• Photosynthesis – The

process of making sugar

• Plants use sugar as food

• Carbon dioxide is absorbed from the air, water is absorbed from the soil, and chloroplasts trap the sunlight

PHOTOSYNTHESIS

• The plant uses the sugars it makes

• The plant releases Oxygen that we breathe

Chloroplasts

Photosynthesis Song• http://www.kidsinglish.com/newspeak/vide

o_clips/photosynthesis-quiz.htm

Parts of a Plant

Stems• Can be as thick as a tree trunk

or as thin as a blade of grass• Have 2 major functions

– 1. carry water, minerals and food between the roots and leaves

– 2. Support the plant, holding up the leaves so they can get sunlight

Roots• Anchor or hold the plant to the ground• Absorb or take in water and mineral

nutrients from the soil• Fibrous Roots

– Grow away from the plant in search of water• Taproots

– Has a large main root, called the taproot.– It grows straight down– Stores food for the plant

How Plants Reproduce• Petals-colorful outer layer

of flowers that help protect the insides that make new plants

• Sepals- the small, green leaves below the petals. They cover and protect the flower as it grows inside the bud

How Plants Reproduce

• Pistil-small knoblike structures in the middle of the plant

• Stamens-smaller stalks surrounding the pistil. Pollen is made here.

How Do Plants Reproduce?

Pollen on the Move• Pollen has to move from the

stamen to a pistil in order for a seed to form.

• HOW CAN THIS HAPPEN???• Animals help this happen!• Animals are attracted by the

colors of the petals and to eat the nectar deep inside the flower.

• Pollen from the stamen is rubbed off onto the animals body

• The pollen is then rubbed off onto the pistil of the next flower the animal visits.

Pollen in the Move

• Wind also can blow pollen from the stamen of one plant to the pistil of another

• After the fertilization, the flower begins to dry up and fall off

• A seed develops inside

How a Plant Grows from a Seed

Life Cycle of a Plant

Seeds on the Move

• Seeds have to move away from each other to have room to grow.

• If they grew too close to one another they would compete for water, nutrients from the soil, and sunlight.

Animal Helpers

• Animals eat fruit and when they do they eat the seeds also.

• The seed will pass through the digestive system onto the ground in the animal’s droppings.

• The animal will usually carry the seeds far from the adult plant so this helps scatter the seeds

Wind as a Helper• Many seeds have wing-shaped seeds to

carry them far from the adult plant.• When the seeds land, many are buried

and new plants grow

Water as a Helper

• Water can carry seeds from one location to another.

• Coconut seeds can float from one island to another and create new trees.

New Plants from Plant Parts• Some plants grow from

stems, roots, or leaves

• Bulbs are underground stems that grow into new plants

• Potato plants sprout new plants right from the potato