Cell Theory & TimelineCell Theory & Timeline

6th Grade Science Kyrene Middle School

Students Will:Students Will:Summarize the contributions scientists have made toward the cell theory Understand Cell Theory.

Cell TheoryCell Theory1. All living things are made of cells.2. Cells are the basic units of structure and function in living things. (structure = form; function = purpose)3. Living cells only come from other living cells.

Early Scientists’ ContributionsEarly Scientists’ Contributions

Cell Timeline #1Cell Timeline #1

334 B.C.E. Aristotle observed nature directly. He classified all known organisms as either plants or animals.B.C.E.= Before Common Era

Cell Timeline #2Cell Timeline #2

1590Hans & Zacharias Janssen produced the first compound microscope by lining up 2 lenses.

Cell Timeline #3Cell Timeline #3

1665Robert Hooke observed lining matter (cork cells) through a compound microscope, which reveals empty cells. He is the first to call the spaces in the cork “cells” which means little rooms.

Cell Timeline #4Cell Timeline #4

1680sAnton van Leeuwenhoek observed lining cells through a simple microscope.

Cell Timeline #5Cell Timeline #5

1838Matthias Schleiden discovered that plants were made of cells.

Cell Timeline #6Cell Timeline #6

1839 Theodor Schwann states “all animals are made of cells.”

Cell Timeline #7Cell Timeline #7

1856William Henry Perkin develops an intense purple dye, which is used to stain slides.

Cell Timeline #8Cell Timeline #8

1858Rudolph Virchow states, “Cells are the last link in a great chain that forms tissues, organs, systems, and individuals. Where a cell exists, there must have been a preexisting cell.”Cells can only arise from pre-existing cells

Create a Cell TimelineCreate a Cell TimelineLabel the timeline with the dates, scientist names, and details of the important discoveries.The earliest date should be on the left and the most recent on the right.Show a reasonable amount of elapsed time between dates.8 events & 8 picturesGraded on neatness, accuracy, and use of color.List Cell Theory and the 3 parts of the Cell Theory.

CellsCells

1. The cell is the basic unit of life

2. Technology furthered the development of cell theory because the invention of the microscope allowed cells to be discovered.

3. The tiny structures that make up cells are called organelles which means little organs.