Biology Notes
Biology Notes
1.02
Sometimes a practice or belief claims to be science but does not follow the scientific method or cannot be proven reliable through experimentation. These practices are examples of pseudoscience, which literally means "fake science." Charms, astrology = stars, and phrenology= reading the bump on skull
1.03
* In the mid 1600s in the Netherlands, the scientist Antonie van Leeuwenhoek developed the first known microscope using a single magnifying lens. He was the first person to observe microscopic cells that we now know to be bacteria and blood cells. Leeuwenhoek shared the designs of his microscope, as well as his observations, with the scientific community.
* Around 1655 the English scientist Robert Hooke used van Leeuwenhoek's ideas and made the first compound light microscope, which used more than one lens to magnify an object. He examined thin slices of cork, a dead plant material, and saw that the cork was made up of thousands of empty chambers. Hooke named these small chambers "cells" after the rows of small rooms found in a monastery.
* With each advance in microscope technology, biologists are better able to examine the microscopic cells that make up living organisms. Let’s explore some of the microscopes commonly used today.
* Light microscopes were the first invented and are still the most commonly used in biology laboratories today. In these microscopes, light travels through the specimen or bounces off the surface of the specimen and then passes through glass lenses. The lenses bend the beam of light to magnify the image viewed through an eyepiece.
* A dissecting microscope is one type of light microscope. It is used for examining organisms at relatively low power, magnifying the image up to 40 times the size of the specimen. A beam of light is produced above the stage and reflects off of the specimen’s surface, passing through the glass lenses that magnify the image.
* The dissecting microscope is useful for examining
1.02
Sometimes a practice or belief claims to be science but does not follow the scientific method or cannot be proven reliable through experimentation. These practices are examples of pseudoscience, which literally means "fake science." Charms, astrology = stars, and phrenology= reading the bump on skull
1.03
* In the mid 1600s in the Netherlands, the scientist Antonie van Leeuwenhoek developed the first known microscope using a single magnifying lens. He was the first person to observe microscopic cells that we now know to be bacteria and blood cells. Leeuwenhoek shared the designs of his microscope, as well as his observations, with the scientific community.
* Around 1655 the English scientist Robert Hooke used van Leeuwenhoek's ideas and made the first compound light microscope, which used more than one lens to magnify an object. He examined thin slices of cork, a dead plant material, and saw that the cork was made up of thousands of empty chambers. Hooke named these small chambers "cells" after the rows of small rooms found in a monastery.
* With each advance in microscope technology, biologists are better able to examine the microscopic cells that make up living organisms. Let’s explore some of the microscopes commonly used today.
* Light microscopes were the first invented and are still the most commonly used in biology laboratories today. In these microscopes, light travels through the specimen or bounces off the surface of the specimen and then passes through glass lenses. The lenses bend the beam of light to magnify the image viewed through an eyepiece.
* A dissecting microscope is one type of light microscope. It is used for examining organisms at relatively low power, magnifying the image up to 40 times the size of the specimen. A beam of light is produced above the stage and reflects off of the specimen’s surface, passing through the glass lenses that magnify the image.
* The dissecting microscope is useful for examining