Unit 1 Scientists at Work Lesson 1 What

  • Slides: 7
Download presentation
Unit 1 Scientists at Work

Unit 1 Scientists at Work

Lesson 1 What is science? science • study of the natural world investigation •

Lesson 1 What is science? science • study of the natural world investigation • procedure used to observe, study, or test something scientists • • (date) make observations plan & conduct investigations (repeated) analyze evidence draws conclusions (use inferences, not opinion) Scientists perform investigations that are testable, can be repeated, and are based on evidence.

Lesson 3 What are some types of investigations? scientific methods observations (date) • planned

Lesson 3 What are some types of investigations? scientific methods observations (date) • planned investigations • methods depend on question asked • types of investigations: – experiment – control all conditions – model – used when can’t use real thing – repeated observation – study processes of nature that can’t control • used when things too big, too far or uncontrollable; repeated lesson continued on next slide

Lesson 3 (continued) • models • physical model – created to simulate real object/event

Lesson 3 (continued) • models • physical model – created to simulate real object/event • computer simulation – used to see what might happen in future or in past • drawing diagrams & flow charts – 2 dimensional models show ideas related Scientists use a variety of scientific methods, observations, and models to study the natural world. lesson continued on next slide

Lesson 3 (continued) • Scientific method • Ask a question • Form a hypothesis

Lesson 3 (continued) • Scientific method • Ask a question • Form a hypothesis – an educated guess that can be tested • Design an experiment – variables: anything in experiment that can be changed; only 1 tested – control: variable that is not changed • Carry out procedure – steps followed – repeated • Record analyze data – accurate • Draw conclusion and evaluate hypothesis – supported by evidence – decide if hypothesis supported or not

Lesson 5 What are some science tools? • Tools (date) • microscope – magnify

Lesson 5 What are some science tools? • Tools (date) • microscope – magnify things too small to be seen • dropper – used to suck up liquids • thermometer – measures temperature • balance – measures mass (kilograms) • spring scale – measures force (newtons) lesson continued next slide

Lesson 5 (continued) • volume • amount of space a solid, liquid or gas

Lesson 5 (continued) • volume • amount of space a solid, liquid or gas takes up • volume of – rectangular object = length x width x height – liquid = use a cup, beaker, or graduated cylinder – irregular object – use graduated cylinder • • record amount of liquid before measuring drop in object record volume again ending volume – beginning volume = object’s volume How you calculate volume depends on the shape of the object.