bio (characteristics of life and the first chem unit ) review

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198 Terms
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Observation

Using your senses to gather information

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Predicting

guessing the most likely outcome of a future event based upon a pattern of evidence

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classifying

grouping or ordering objects or events into categories based upon their characteristics

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measuring

using the standard measuring units to gather a type of quantitative data (Ex: volume, length, width)

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inferring

making assumptions based on observations that could potentially explain something

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communicating

using words, symbols, to describe an object, action or event to share information

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predicting, classifying, observation, measuring, inferring, communicating

what are the 6 basic science process steps? (P.COMIC)

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biology

what is the scientific study of life?

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science

what is an approach to understanding that is based on inquiry

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exploration

what does biology begin with (like other sciences)

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data

recorded observations, information you have gathered from your experiment

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hypothesis

a proposed explanation or educated guess for your experiment

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testable and falsifiable

a hypothesis must be BLANK and BLANK

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phenomena

scientists seek natural causes for natural BLANK

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results

BLANK will support or not support the hypothesis

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peer review

In order to publish something the writing must be evaluated by an anonymous scientist, this process is known as a BLANK

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theory

An explanation of phenomena that was based off of many hypothesis and experiments from valid scientists

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hypothesis, theory

a lot of BLANK leads to a BLANK

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fact

a BLANK is a piece of information considered TRUE based off all current evidence

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variables

BLANK are factors that change in an experiment

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control group

what group will NOT be affected by the independent variable

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experimental group

what group WILL be affected by the independent variable

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controlled experiment

a BLANK is a type of experiment that tests one factor at a time

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x

what axis is the independent variable on

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y

what axis is the dependent variable on

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placebo

something which has a positive mental effect, but no physical effect

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double blind controlled study

what is the gold standard for a medical trial.

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pseudoscience

A fake or false science that makes claims based on little or no scientific evidence.

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anecdotal evidence

what type of evidence is opinion based and is based off one or little examples? usually is used in pseudoscience

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all organisms are made up of one or more cells

what is the 1st characteristic of life?

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displays organization

what is the second characteristic of life?

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grows and develops

what is the 3rd characteristic of life?

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responds to stimuli

what is the 4th characteristic of life?

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requires energy

what is the 5th characteristic of life?

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maintains homeostasis

what is the 6th characteristic of life?

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adapts and evolves over time

what is the 7th characteristic of life?

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it reproduces

what is the 8th characteristic of life?

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independent variable

the factor that changes during the experiment and is being tested

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dependent variable

the outcome of the independent variable, the thing that's being measured

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sources of error

unexpected errors that can be made in. your experiment

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bias

a prejudice or opinion someone has through life experiences

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stimulus

a trigger that sets off physical or behavioral differences

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sexual reproduction

the process of organism combining genetic information

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asexual reproduction

reproduction without the fusion of living organisms

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homeostasis

a balance created by the body in order to survive and function

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metabolism

when the body converts what you consume into energy

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cells

a small unit of life in every living thing

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evolve

when the species change due to the environment

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biosphere

the parts of Earth that contain living organisms

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what is matter

It is anything that has mass and takes up space

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what is mass

the amount of matter in an object

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What is a element?

a substance that cannot be broken down to other substances by chemical reactions

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what is the atomic number?

number of protons and electrons

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What is the atomic mass?

mass of the atom

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STARRED: of the BLANK naturally occurring elements, 25 are essential to people

92

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STARRED: BLANK are required in only very small amounts and are essential for life

trace elements

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Elements can combine to form BLANK, substances that contain two or more elements in a fixed ratio.

compounds

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what are the most common elements in a living organism?

carbon, hydrogen, oxygen, nitrogen

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what is a fixed ratio?

a ratio is used to compare the amount of elements in a chemical formula

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atom

the smallest unit of matter

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a proton is

positively charged

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an electron is

negatively charged

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a neutron is

electrically charged

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how many atomic mass units does a proton have? (AMU)

1 amu

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how do you get the number of neutrons?

subtract the atomic number from the atomic mass number

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what is an isotope?

same number of protons, different number of neutrons

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what is a radioactive isotope?

an isotope that is unstable and the nucleous decays spontaneously

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what is a chemical bond?

the force that holds two atoms together

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what are atoms that are electrically charged as a result of gaining and losing electrons

ions

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what is formed between oppositely charged ions

ionic bonds

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what are cations

positively charged ions

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what is anion?

A negatively charged ion

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What is a covalent bond?

A chemical bond formed when two or atoms share electrons.

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covalent bonds hold together atoms in BLANK

molecules

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What is a non-polar bond?

a covalent bond in which electrons are shared equally

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What is a polar covalent bond?

unequal sharing of electrons

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Is water polar or non-polar?

polar

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hydrogen bonds

weak attraction between water molecules

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REMINDER: you must draw the H20 in a model for the test (type: ok)

ok

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what are chemical reactions?

the making and breaking of chemical bonds

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reactants

the input of a chemical reaction

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products

the output of a chemical reaction

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what percentage of matter are our cells made up of?

70-95%

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water molecules stick together as a result of BLANK

hydrogen bonding

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