Monday, December 14, 2009
Thursday, December 10, 2009
SCIENCE QUIZ
FRIDAY, December 11, 2009!
only 5 B
study nervous system....
it will be oral quiz, not to everybody, really easy.... I will only ask you to give me examples of how the nervous system works!
only 5 B
study nervous system....
it will be oral quiz, not to everybody, really easy.... I will only ask you to give me examples of how the nervous system works!
Monday, November 30, 2009
PARTS OF THE VEGETAL CELL
Cell Wall
A rigid layer that supports and protects the plant cell.
Cytoplasm
A jelly like substance that contains many chemicals to keep the cell functioning.
Nucleus
The organelle that determines all of a plant cell´s activities and the production of new cells.
Cell Membrane
A covering that holds the plant cell together and separates it from its surroundings.
Vacoule
An organelle that stores food, water or wastes.
Chloroplast
organelles that make food for the plant cell.
Chromosomes
threadlike structure that contain information about the characteristics of the plant.
Mitochondria
organelles that release energy from food.
A rigid layer that supports and protects the plant cell.
Cytoplasm
A jelly like substance that contains many chemicals to keep the cell functioning.
Nucleus
The organelle that determines all of a plant cell´s activities and the production of new cells.
Cell Membrane
A covering that holds the plant cell together and separates it from its surroundings.
Vacoule
An organelle that stores food, water or wastes.
Chloroplast
organelles that make food for the plant cell.
Chromosomes
threadlike structure that contain information about the characteristics of the plant.
Mitochondria
organelles that release energy from food.
THE MICROSCOPE
A little bit of history
The first microscopes were invented in the early 1600s. One scientist who built and used an early microscope was Robert Hooke. In 1665 Hooke observed a thin slice of cork through a microscope. The tiny walled spaces he saw in the cork reminded him of tiny rooms. So he called them cells. Over the next 200 years, scientists learn more and more about the cells. They learn that the cell is the basic unit of structure and function of all living things.
The first microscopes were invented in the early 1600s. One scientist who built and used an early microscope was Robert Hooke. In 1665 Hooke observed a thin slice of cork through a microscope. The tiny walled spaces he saw in the cork reminded him of tiny rooms. So he called them cells. Over the next 200 years, scientists learn more and more about the cells. They learn that the cell is the basic unit of structure and function of all living things.
Subscribe to:
Posts (Atom)
