Unit 1 - Bio Midterms

Scientific Method:

A five step process that scientists always follow

step 1

Ask questions

step 2

Form a testable hypothesis

step 3

Conduct a controlled experiment

step 4

Record 3 analyze results to test the hypothesi

step 5

Develop conclusions -> use data from experiments to conclude if it supports the hypothesis

Observation

First step of the scientific method which includes gathering information about events, or processes in a careful orderly way

Controlled Experiment

a scientific test where researchers change only one variable at a time, while keeping all other conditions constant

Data

information you collect by making observations, and it means multiple pieces of information

Quantitative Data

data expressed by numbers obtained by counting or measuring

Qualitative Data

Data that are descriptive and involve characteristics that cannot easily be measured. It is less accurate than quantitative data.

Inference

A logical Interpretation based on prior knowledge.

Hypothesis

A proposed scientific explanation for a set of observations. They must be testable using a controlled experiment. If the hypothesis is supported enough it may lead to a theory

Theory

a well tested explanation that unifies a broad range of observations

Controls

the element in an experiment that is held the same at a constant. It is so you can test your independent variable.

Variables

the thing that you can keep the same, change, or measure when you are testing a hypothesis

Independent Variable

The variable you change to see if there is an affect to your answer also known as manipulated

Dependent Variable

the variable that changes in response to the independent variables also known as responding

Eight Common Characteristics of Living

All 8 are required to be a living thing they are

Grow and Develop

Reproduce

Metabolism

DNA

Maintain Homeostasis

Evolve

Respond to the environment

made of cells

Grow & Develop

Cells grow and develop until they get bigger and they come together to make humans

Reproduce

Multi-cellular structures, all living things can make more of what they are.

Metabolism

Materials and energy which is what breaks down your food.

DNA: DNA codes for who we are and what we are

Evolve

As a group, they change and develop over time adaptation to the environment

Maintain Homeostasis

Constant temperature of pH, to hot or to cold.

Respond to the Environment

Stimuli, hunger, responds to danger

Made of Cells

Cells are the smallest , most basic unit of life

Levels of Organization

Yayaya

Atoms: Smallest unit of living things

Molecules

Atoms that make up living things

Cells

Smallest working unit of life

Tissues

Groups of similar types of cells

Organs

Groups of different tissues that have a common function

Organs Systems

Several organs working together

Organism

Individual living thing

The 3 Levels of Organization

Population: Group of (type of organism) living in the same place at the same time

Community: Different population living in the same place at the same time

Ecosystem: Community & its nonliving (abrotic) surrounding