Log: Aug. 16thLog: Aug. 16th

List the six step of the Scientific List the six step of the Scientific Method, describe one. ( uses / notes Method, describe one. ( uses / notes if needed)if needed)

Section 1 Characteristics of Living Things

Living Things Have Cells• All living things are composed of one or more cells.

• A cell is a membrane-covered structure that contains all of the materials necessary for life.

• Some organisms are made up of only one cell and some are made up of trillions of cells. In an organism with many cells, different kinds of cells perform specialized functions.

Chapter 1

Single cell Multi Cell organism

• Homeostasis is the maintenance of a stable internal environment.

Heart Beats Faster

Breathing Harder

But why????

Respond to Change and Surroundings

Chapter 1

Section 1 Characteristics of Living Things

Respond to Change

• A stimulus is anything that causes a reaction or change in an organism or any part of an organism.

• Responding to External Change Organisms must respond to change in the external environment in order to maintain their homeostasis.

Chapter 1

The chemicals of LifeThe chemicals of Life

All cells are made of chemicalsAll cells are made of chemicals The most abundant areThe most abundant are

CarbohydratesCarbohydrates ProteinsProteins LipidsLipids Nucleic acidsNucleic acids

Section 1 Characteristics of Living ThingsChapter 1

Living Things Have DNA

• The cells of all living things contain the molecule deoxyribonucleic acid, or DNA. 1. 1. = deoxyribonucleic acid= deoxyribonucleic acid 2. in every cell2. in every cell 3. specialized molecules which provide3. specialized molecules which provide instructions for making proteinsinstructions for making proteins

•DNA controls the structure and function of cells.

•The passing of traits through DNA is called heredity.

Section 1 Characteristics of Living Things

Reproduction

• Organisms make other organisms similar to themselves.

• In sexual reproduction, •two parents produce offspring •share characteristics of both parents.

• In asexual reproduction, •a single parent produces offspring •identical to the parent.

Chapter 2

Section 1 Characteristics of Living Things

Living Things Use Energy

Chapter 2

• Organisms use energy to carry out the activities of life.

• An organism’s metabolism is the total of all of the chemical activities that the organism performs.

LOW

metabolism

High metabolism

Section 1 Characteristics of Living Things

Living Things Grow and Develop

•Development is the process of change •All living things, whether they are made of one cell or many cells, grow during periods of their lives.

• Living things may develop and change as they grow.

Chapter 2

HomeworkHomework

Page 5-6 Question at the bottom of Page 5-6 Question at the bottom of pagepage

Must answer in complete sentence to Must answer in complete sentence to get credit for answers get credit for answers

The End

Log Log

Use time to studyUse time to study Write 5 quiz questionsWrite 5 quiz questions Star any topic you need help onStar any topic you need help on

Log: Aug.17thLog: Aug.17th

What are the characteristic of living What are the characteristic of living things?things?

Hint 6 specific thingsHint 6 specific things

Cell organization- Made from cellsCell organization- Made from cells Made from chemicals of lifeMade from chemicals of life Use EnergyUse Energy Respond to environment (stimulus/ Respond to environment (stimulus/

response)response) They Develop/ GrowThey Develop/ Grow ReproduceReproduce

Where do living things come Where do living things come fromfrom

All living things come from other All living things come from other living things via reproductionliving things via reproduction

Spontaneous Generation is a false Spontaneous Generation is a false theory which states: nonliving things theory which states: nonliving things can produce living things can produce living things

Redi’s ExperimentRedi’s Experiment Italian Doctor Francesco Redi Italian Doctor Francesco Redi

disproved spontaneous generationdisproved spontaneous generation This was a controlled experiment This was a controlled experiment Read page 9: what factors were Read page 9: what factors were

changed?changed?

Pasteur’s ExperimentPasteur’s Experiment

Log: Aug 18thLog: Aug 18th

What did Reid’s experiment prove.What did Reid’s experiment prove. Explain his experimentExplain his experiment

Log: Aug. 19Log: Aug. 19

Work on paragraphs (Bacteria) Work on paragraphs (Bacteria)

Part 2Part 2

What do Living things need to surviveWhat do Living things need to survive

A. Food A. Food

1. all 1. all organisms organisms need food for need food for energy & energy &

raw materials to perform life raw materials to perform life processes,processes,

build & repair cellsbuild & repair cells

FoodFoodAutotrophsAutotrophs

a. a. = make their = make their own foodown food

b. plantsb. plants

HeterotrophsHeterotrophs

a. a. = eats other = eats other organisms for organisms for energyenergy

b. humans, deer, b. humans, deer, lizardslizards

B. WaterB. Water

1. organisms need 1. organisms need water to water to obtain chemicals from obtain chemicals from

their surroundingtheir surrounding Break down foodBreak down food growgrow Move substances in Move substances in

within their bodieswithin their bodies reproducereproduce

C. AirC. Air 1. oxygen &/or carbon 1. oxygen &/or carbon

dioxidedioxide

2. required in chemical 2. required in chemical process thatprocess that

releases energy releases energy from foodfrom food

Living SpaceLiving Space

All organisms need a place to All organisms need a place to live, get food and water and live, get food and water and sheltershelter

Do to limited space some Do to limited space some organisms must compete for organisms must compete for spacespace

Stable Internal ConditionsStable Internal Conditions

Organism must be able to keep their Organism must be able to keep their internal systems stableinternal systems stable

Homeostasis- the maintenance of Homeostasis- the maintenance of internal conditionsinternal conditions