YKSD Biology Chapter 5 Lesson 2 "Protists"

Chapter 5 Lesson 2 "Protists"

Materials:

All About Protists worksheet
Protists Review sheet
The 5X7 Index card for Protozoan.

Objective:

Students will describe the features of several types of algae.
Students will describe the features of several types of protozoans.

Alaska Standards:

SCI A-12 Students will distinguish the patterns of similarity and differences in the living world in order to understand the diversity of life and understand the theories that describe the importance of diversity for species and ecosystems.
SCI A-15 Students will use science to understand and describe the local environment.
SCI B-1 Students will use the processes of science: classifying.

Anticipatory Set: Students will be shown a slide show with the following pictures of protists:

Discuss the similarities and differences of each protist in the pictures. Explain that Protista is the most diverse kingdom in biology. It is the only kingdom that includes organisms that make their own food like plants; that consume food, like animals; and that absorb food, like fungi. The kingdom has both single celled organisms and multicellular organisms. The single celled protists are different from bacteria because they have organelles inside their cells.

Teacher Input: Teacher will work with the students on the first part of the Protozoan Review Sheet. Together all students will research and discuss what the Protists have in common with all the other kindoms.

Teacher Modeling: The teacher will discuss the characteristics of Algae. While looking at a picture either on Page 90 or this one. Topic of discussion are:

Algae, plant-like protists,
Most are found in water and they swim or float.
Produce half of the world's carbohydrates, (a lot of food for other organisms)
Produce half of the world's oxygen supply.
Many different types the picture is the Euglena gracilis.
Another type is these diatoms. (see picture)
Have hard shells made of glass-like material.
Shell deposits that have built up are used for polish, soaps, scouring powders (comet), and toothpast.
Another type is Kelps and other seeweed (see picture) or page 91
It is multicellular.
Grow very big but cells are all alike, little specialization like plants.
Harvested by humans and used to thicken foods.
Other types of Algae can grow on land.

Check for Understanding:

Have students complete the bottom of the worksheet first couple questions on Algae.

Guided Practice: The teacher will discuss the characteristics of protozoans. Start by looking at a picture of an amoeba and discuss:

Protozoans, animal-like protists.
Can live on land, in water, or inside other organisms.
Do not make their own food, they live on other organisms.
Divided by the way they move.

Have the students list the four different types of movement and then tell some key points about each type.Students will fill in the red type spots:

Type of Movement	Use a pseudopod	Use Hairlike cillia	Use Flagella to push or pull themselves around.	No means of movement as adults
Characteristics of this type:	surround and trap food. live on rocks, plants , in ponds.	Live mainly in ponds ingest food through an opening	Can be parasitic and live in animal intestines. Can cause other diseases such as sleeping sickness.	reproduce by forming spores all sporzoans are parasites
Names of members of this type.	Amoebas	Paramecium	typanosomes	plasmodium, anopheles.

Closure: The questions on Page 94 will be divided among the students and each group of students will have to come up with the answer for the questions.

Independent Practice: Students will finish and complete the following.

Duration:

30 minutes + 10-15 for Independent Practice (Could be longer if taken for homework).