Tools of a Biologist.

Slides:

Advertisements

Similar presentations

Tools of a Biologist.

Advertisements

3.1 AS Unit F211: Cells, Exchange and Transport The cell is the basic unit of all living things. How to use a light microscope Why electron microscopes.

Microscopes. Purpose of scopes Magnification – make objects appear larger Resolution – keep the image clear.

Bellwork Why do scientists use Microscopes?

Tools of a Biologist. Microscopes: number one tool of a biologist Micro=Scope= – Small-to view A microscope is an instrument used to view very small objects.

Microscopes Section 3-1.

Microscopes Section 2.2. History and use of the microscope

Microscopes are used to increase the magnification and resolving power of the unaided eye MICROSCOPES.

Microscopes The Discovery of Cells Quiz Number paper from 1-5 Identify the following pictures.

Tooth with plaque Magnification: 10X.

Pages 52 to 54.  Compound Light  Visible light is used to illuminate the specimen  Glass lens bend the light to magnify the image  Magnifies up to.

Cytoplasmic Organelles Plastids Plant organelle that may take many forms. Examples include chloroplast, leukoplasts (which store food), & chromoplasts.

MICROSCOPES F STEREO F COMPOUND LIGHT F TRANSMISSION ELECTRON (TEM) F SCANNING ELECTRON (SEM)

Theory vs Law Law – a fact Theory – an explanation for the fact Example… – Law = If I throw a apple up into the air, it will fall to the ground. – Theory.

Microscopes. Compound Light Microscope – Use lenses to magnify the image of an object by focusing light – Cell structures as small as 1 millionth of a.

Biology 3.1 Looking at Cells.

Compound Light Microscope

Microscopes help us see small objects typically less than 500 nm

Unit One: Matter and Energy Flow in Cells

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 4 Tools and Techniques Chapter 1 Objectives List the function.

The Cell Chapter 4 Microscopes

Microscopes.  Invented by Robert Hooke and Antoni van Leeuwenhoek  One of the most widely used tools in Biology  An instrument that produces an enlarged.

Chapter 3 Section 1 Microscopes. Units of Measure  Metric system of measurement  International System of Measurement SI  Base Unit is the Meter (m)

Unit 2: Day One Microscopes Caylor. Journal 1 On a clean sheet of paper, write down three things you already know about microscopes, making slides, the.

Chapter 3: Cell StructureSection 1: Looking at Cells 1 Cell Structure Chapter 3.

MICROSCOPES A. COMPOUND LIGHT MICROSCOPES. FEATURES Magnification 10X to 400X Formula for determining total magnification – objective lens X ocular.

Sec. 4- Tools and Procedures Metric system-decimal system of measurement whose units are based on certain physical standards –Scaled on multiples of ten.

Introduction to the Microscope. Types of Microscopes The models found in most schools, use compound lenses to magnify objects. The lenses bend or refract.

Tools of the Biologist Chapter 1 Section 1-4. Biology Tools Scientists use many tools in the laboratory and in the field. –Some are used for measuring.

Microscopy. I. Microscopes ENHANCES powers of observation; (LM, SEM, TEM). Microscopy and Measurement.

1.5 Technological Advances of the Microscope (Text pages 17 and 18)

Section 3-1 Looking at Cells.

Microscope Technology

THE MICROSCOPE: SEEING IS BELIEVING (PART 1) SC.912.L.14.4 COMPARE AND CONTRAST STRUCTURE AND FUNCTION OF VARIOUS TYPES OF MICROSCOPES.

Cell Theory and the Microscope SBI3C0 Ms. Manning.

Tools of a Biologist MICROSCOPY Two factors play an important role in microscopy: 1. Magnification compares real size of a specimen with the one viewed.

Microscopes Microscopes. Importance One of the most widely used tools in Biology One of the most widely used tools in Biology Produces enlarged images.

Journal 1 On a clean sheet of paper, write down three things you already know about microscopes, making slides, the cell parts, and photosynthesis/respiration.

Microscopes…... Types….. 1 – Compound Light 2 – Transmission Electron (TEM) 3 – Scanning Electron (SEM)

B-1.2: Use appropriate laboratory apparatuses, technology, and techniques safely and accurately when conducting a scientific investigation.

Microscopes  How can we observe cells?. What technology allows biologists to study microscopic life?  A. Compound Light Microscope 1.Has two lenses.

The Microscope An optical instrument used for viewing very small objects invisible to the naked eye, typically magnified several hundred times.

Tools of Science. Microscopes Magnify, or make the image appear larger than it really is Most important tool of the biologist.

The Compound Light Microscope

Microscopes Section 3-1. History of the Microscope 1590 –first compound microscope.

Prepared By: Ms. Carolyn R. Magat

Introduction to Microscopes

1.4 Tools & Techniques Microscopes– tools that extend human vision by making enlarged images of objects Magnification – power to increase the size of an.

Tools of a Scientist and Introduction to the Microscope

The Microscope.

Tools of a Biologist.

Microscopes How can we observe cells?.

The Microscope.

Do Now How did the invention of the microscope help scientists make advances in Biology?

Microscopes Lesson 4 September 24th, 2010.

Microscopes Lesson 3 September 24th, 2010.

Microscopes Section 4.2.

Microscope What is the most widely used tool in biology? Microscope

Introduction to the Microscope

Tools of the Biologist Microscopes.

Exploring Life 1.3.

Microscopes How can we observe cells? HB p. 31.

Notes: Microscopes Microscope

Presentation transcript:

Tools of a Biologist

Microscopes: number one tool of a biologist Small -to view Function: microscope are instruments used to view very small objects. In biology we will use it to view…. living cells and unicellular organisms.

Compound Light Microscope

There are 3 types of microscopes used in biology: 1. Compound light microscope -Compound- look through 2 lenses at the same time in order to properly magnify the organism.

Compound light microscope: -light must pass through the diaphragm and through the object. -object must be “thin” or transparent so the light can pass through it. -Diaphragm: regulates the amount of light that can pass through. -Best setting of the diaphragm is #2

Total magnification: low power: ocular lens x10 low objective x4 -------------- x40 medium power: low objective x10 x100 high power: low objective x40 x400

Limit of Resolution -is the point at which you see an item most clearly. Any magnification above or below that point will results in the object looking blurry.

Type 2: Stereoscope -Used to view the surface of objects which are too large for light to pass through them. -Uses 2 lights to illuminate the surface of the object. -Stereo means “3 dimensional” -Provides a 3-D detailed look at the surface of an object.

-look through 2 ocular lenses -magnifies between x10 to x60

Type 3: Electron Microscopes Uses electrons to form an image and NOT light Has a very high limit of resolution. -can see items very clearly at any magnification -can magnify up to 500,000x and still be clear Object is placed in a vacuum No air No oxygen Organism is DEAD

Two types of electron microscopes: 1. T.E.M. ~ Transmission Electron Microscope Produces a 2-D, black and white image of inside of a cell.

2. S.E.M. ~ Scanning Electron Microscope Produces a 3-D, black and white image of the surface of an object.

Staining The purpose is to: add color to a cell so that the cell and its structures can be seen more clearly through a microscope.

Additional tools of a biologist: Tool used to separate the components of a mixture by their different densities. Chromatography:

Link to graphing