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Life Science Midterm Review
Transcript of Life Science Midterm Review
Steps of the scientific process
Ask a question
Formulate a hypothesis
Conduct an experiment
Types of Cells
Atoms Molecules Cells Tissue
Organ Organ System Organism
Unicellular vs Multicellular
has one cell only,
are usually smaller, less specialized, and
are usually larger, more specialized, and
Different types of living things are put into groups so that it's easier to classify them. This is called classification. The branch in Biology that is to do with classification is called 'taxonomy'. The people that study this are called taxonomist. In 1753, Carolus Linnaeus invented a new way or grouping and naming living things that scientis use today. They are put into 7 groups...
Digestive System: The digestive system breaks down food, absorbs nutrients and eliminates waste.
responsible for eliminating waste from the body
Repetition Vs Replication
Repetition: Occurs when multiple sets of measurements are made during one scientific investigation.
Replication occurs when a scientific investigation is reproduced by another person.
Known as Binomial Nomenclature
made up of the Genus and species name
Life Science Midterm Review
Ready Or Not:
Here it comes! Clear your desks and take out a pencil
Independent Vs. Dependent Variables
Independent: What you can control or manipulate in an experiment
Dependent: The results as a reaction to the controlled or manipulated
Scientific theory is a proposed description, explanation or model of something occurring in nature. These theories have to be testable so that scientists can use the scientific method to see if they work.
Scientific evidence can either support or counter a theory. IF such evidence is found, a new theory may be proposed.
All living things are made up of cells.
Cells are the basic units of structure and function in living things.
Living cells only come from other living things.
The human body is the entire structure of a human organism. By the time it reaches adulthood, the body consists of close to 100 trillion cells.
Beginning of the digestive system
Mechanical process: chewing
Chemical process: Saliva
Connects mouth to the stomach
Mechanical digestion occurs from the smooth muscle of the stomach walls contract.
Chemical digestion occurs as the food mixes with digestive juices.
Chemical digestion by substances produced by liver and pancreas.
Nutrients are absorbed by the villi.
Water is absorbed here
We all know what happens next!!! Waste is eliminated through the rectum.
Parts of the Cell
The skeletal system is responsible for supporting the body, protecting internal organs, storing minerals, allowing movement and producing blood cells.
The muscular system produces movement, circulate blood and move blood through the digestive system.
The skeletal and muscular system work TOGETHER to help the body move.