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Chapter 1

Scientific methods

are organized ways to answer questions and solve problems

hypothesis

is a possible answer to your questions

evidence

observations and facts gained from experiments

2-dimensional

describe objects that have length and width but not height

3-dimmensional

describe objects that have length, width and height

inference

is a conclusion drawn from data and observations

procedure

is a step by step instructions on how to perform a test

investigation

is a careful way of looking for something

inquiry

process of asking questions and searching for answers

tool

is an object or device used to perform a task

Scientist

first study what other scientist have already learned about the answers to thier questions.

observations are made

with senses and tools

Research study references

encylopedias books, magazines or journals, Interent and more.

Telescope

to help you see objects that are far away

thermometer

to measure temperature

computer

to anaylsis data

microscopes

use several lenses to make objects appear much larger

safety

Read activity carefully,clean work area,

scientific methods include

experiments, observations, survey, and sampling

variables

things that change

independent variable

is the thing that you changed

dependent variable

the thing you must measure or observe

controlled variable

the things you keep the same

models

are objects or ideas that represent other things

procedure

keep records , organize your data, presenting data(bar or line graph)

bar grqph

uses rectangular bars to compare data

line graph

connect points of data on a graph with straight lines

line graphs

are used to show patterns of data over time.

reasonable answer

should not favor one opinion over another unless its supported by evidence.

Technolgy

is the knoledge, process, and products that solve problems and make life easier

science and technology

solve problems with health, transportation, construction, communication.

technology

helps sciencist and others extend their senses(hearing, seeing, touch)

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