Biology I Core Lab Summaries

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Biology I Core Lab Summaries

9-12 SCHOOLS

Biology I

Core Lab Summaries

Revised Summer 2007

BIOLOGY I ACTIVITY 1

Pine Cone Observation (The Powers of Observation)

PURPOSE:

EQUIPMENT:

SUMMARY:

SAFETY:

The student will make qualitative and quantitative observations.

Pinecones

Hand Lens, String, Rulers

Triple Beam Balance

1000 ml Beaker

Students will make as many different observations as they can in a 14 minute time period. Students

then share and “score” their observations. Discussion will help students classify their observations as

quantitative or qualitative and direct or indirect.

Do not eat or drink. Be careful with glassware.

BIOLOGY I ACTIVITY 2

Seed Germination (The Scientific Method at Work)

PURPOSE: Students will design and carry out an experiment. They will analyze and display their results, draw

conclusions and communicate the results to their classmates.

EQUIPMENT: Radish Seeds

Ziploc Sandwich Bags

Paper Towels

Black Permanent Markers

Graduated Cylinder

SUMMARY: Students design an experiment around factors which effect the germination of radish seeds. After a

step by step procedure is approved by the teacher, students will set up the experiment and collect

data. They will present their data in a table or graph in an oral presentation to the rest of the class.

SAFETY: Do not eat or drink. Be careful with glassware. Follow any additional safety guidelines as instructed

by the teacher.

BIOLOGY I ACTIVITY 3

Carbohydrate Lab

PURPOSE: 1) To determine how different carbohydrates react to the Iodine and Benedict’s tests and 2) use the

results to determine the type of carbohydrate found in given unknown materials.

EQUIPMENT: test tubes

boiling water bath

Iodine & Benedict’s solutions

samples of the three types of carbohydrates

unknown carbohydrates

SUMMARY: Students test a monosaccharide, disaccharide and polysaccharide using the Iodine test and the

Benedict’s test. By testing these substances, students will develop a chart for determining the type

of carbohydrate. Students will then test various unknown substances and use the chart developed in

the first part of the lab to determine the type(s) of carbohydrates present in each.

SAFETY: Do not eat or drink. Be careful with glassware. Report all spills to teacher. Use caution with hot

materials.

Science Curriculum: Summer 2007 Lab Summaries: Page 1 of 5 Biology I


9-12 SCHOOLS

Biology I

Core Lab Summaries

Revised Summer 2007

BIOLOGY I ACTIVITY 4

Enzyme Activity in Liver

PURPOSE:

EQUIPMENT:

SUMMARY:

SAFETY:

To observe the effects of adding organic and inorganic catalysts to hydrogen peroxide.

beakers or disposable cups

H 2 O 2

raw liver and potato

cooked liver and potato

manganese dioxide

tweezers

thermometer

pH paper

wooden splints

Students will observe the reactivity of hydrogen peroxide when the following items are added:

manganese dioxide, raw liver, raw potato, cooked liver, cooked potato. Using this information, they

will try to develop an explanation for the observed reactions.

Do not eat or drink. Use caution with manganese dioxide.

BIOLOGY I ACTIVITY 5

Microscope Lab

PURPOSE: Students will be able to develop skills in using the microscope (adjustment in focusing, directional

movement of slide during observation, determination of actual size of specimen, etc.).

EQUIPMENT: microscope

slides

cover slips

newspaper

scissors

eye dropper

probe

Various prepared slides

SAFETY: Proper procedures in using the microscope.

BIOLOGY I ACTIVITY 6

Observing Cells

PURPOSE: Students will observe a variety of living cells and become familiar with basic cell structures.

EQUIPMENT: toothpicks

glass Slides

cover slips

methylene blue

onion

Lugols iodine solution

paper towels

compound microscopes

SUMMARY Students will observe cheek cells and onion cells, practice staining techniques and observe

differences between plant and animal cells.

SAFETY: Lugol’s iodine solution is poisonous if ingested. Iodine solution can be an irritant to skin and eyes and

will stain clothing.

Science Curriculum: Summer 2007 Lab Summaries: Page 2 of 5 Biology I


9-12 SCHOOLS

Biology I

Core Lab Summaries

Revised Summer 2007

BIOLOGY I ACTIVITY 7

Egg Osmosis

PURPOSE:

EQUIPMENT:

SUMMARY:

SAFETY:

To use a model to observe transport across a cell membrane.

cups

vinegar

distilled water

corn syrup

eggs

electronic balance

graduated cylinders

food coloring

Students will place eggs in vinegar, corn syrup, and distilled water. They will observe and measure

the liquid volume and egg mass. The results will be recorded and an explanation of the results will

be developed.

Wash hands after handling eggs.

BIOLOGY I ACTIVITY 8

Mitosis and Cytokinesis

PURPOSE: Students will identify the stages of mitosis.

EQUIPMENT: compound microscopes

prepared slides of Allium onion root tip

SUMMARY: Students observe cells in varying stages of mitosis and cytokinesis, draw representative diagrams of

each stage, and list the major events which occur during each stage.

SAFETY: Use caution with glass slides and microscopes.

BIOLOGY I ACTIVITY 9

Yeast Lab

PURPOSE: To determine the materials necessary for yeast to live and reproduce.

EQUIPMENT: plastic snack bags

yeast

flour

sugar

water

salt

warm water bath

balance

graduated cylinder

SUMMARY: Students will design an experiment using provided materials to determine which items are necessary

for the survival and reproduction of yeast cells. After teacher approval, students will set up the

experiment and make observations about gas production.

SAFETY: Do not eat or drink. Use caution around warm water bath.

BIOLOGY I ACTIVITY 10

Biologica

PURPOSE: To discover the relationship between genes, chromosomes, and external appearance.

EQUIPMENT: Laptops

Biologica software

SUMMARY: Students use the software to investigate genes and chromosomes in a fictional dragon species.

SAFETY: Use caution with electrical equipment, especially cord tripping hazards.

Science Curriculum: Summer 2007 Lab Summaries: Page 3 of 5 Biology I


9-12 SCHOOLS

Biology I

Core Lab Summaries

Revised Summer 2007

BIOLOGY I ACTIVITY 11

Plier Birds

PURPOSE:

EQUIPMENT:

SUMMARY:

SAFETY:

To use a model to demonstrate adaptation.

various pliers

various hard shelled nuts

calculators

Students will simulate different beak sizes with pliers and determine the most efficient beak in

utilizing a limited food source. Each student in the group chooses a pair of pliers to use as a beak.

Each is given a minute to try and pick up as many food items as possible. After the first round,

students collect food simultaneously to simulate competition.

Do not eat or drink. Use caution with pliers, especially during competition.

BIOLOGY I ACTIVITY 12

Dichotomous Key

PURPOSE: To learn how a dichotomous key is constructed and to become proficient in using a key.

EQUIPMENT: paper and pencil

copies of the fictional organisms

SUMMARY: Students develop a key using the provided fictional organisms.

SAFETY: None

BIOLOGY I ACTIVITY 13

Population Growth

PURPOSE: The student should gain a working knowledge of carrying capacity, doubling time, exponential growth

and how each of these effect population growth and resources.

EQUIPMENT: calculator

graph paper

SUMMARY: Students interpret a case study of reindeer population over a period of 40 years. They interpret

graphs of the reindeer population and then construct a similar graph using a data table of human

population. Finally, the student will form conclusions based on interpretation of graph data.

SAFETY: none

BIOLOGY I ACTIVITY 14

Food Chain

PURPOSE: To determine the minimum number of organisms that can survive in an aquatic ecosystem.

EQUIPMENT: laptop computers

Food Chain software

SUMMARY: Students use the software to develop and test hypotheses about the minimum number of species

required in an aquatic ecosystem. Students must explain at least one supported hypothesis and one

unsupported hypothesis.

SAFETY: Use caution with electrical equipment, especially cord tripping hazards.

Science Curriculum: Summer 2007 Lab Summaries: Page 4 of 5 Biology I


9-12 SCHOOLS

Biology I

Core Lab Summaries

Revised Summer 2007

BIOLOGY I ACTIVITY 15

TerrAqua Column

PURPOSE:

EQUIPMENT:

SUMMARY:

SAFETY:

To determine the effect of one variable on an enclosed ecosystem.

2 liter pop bottles

potting soil, sand or garden soil

radish seeds

distilled water, vinegar or pond water

fertilizer stakes or Miracle Gro

clear packing tape

scissors

graduated cylinders

laptop computers

graphing software

Students design an experiment to test the effect of a single variable on the growth of radish seeds in

a closed ecosystem. After teacher approval, students construct two closed ecosystems (experimental

and control groups). Students measure pH, height of water in bottle, number of seedlings growing,

and height of seedlings over a period of 3 to 4 weeks. At the conclusion, students use computers to

create a graph of the collected data and write a concluding paragraph about the results of the

experiment.

Do not eat or drink. Use caution with chemicals and sharp objects. Use caution with electrical

equipment, especially cord tripping hazards.

BIOLOGY I ACTIVITY 16

Fetal Pig Dissection

PURPOSE: Students will develop dissection and identification skills.

EQUIPMENT: fetal pigs

dissection kits

dissection trays

disposable gloves

paper towels

goggles

string

SUMMARY: Students work in groups to dissect a fetal pig. Students will become familiar with the major systems

of the fetal pig (corresponding to the same systems in humans).

SAFETY: Students must wear goggles and gloves at all times (preserving fluid could be an irritant).

Science Curriculum: Summer 2007 Lab Summaries: Page 5 of 5 Biology I

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