Unit 2 Scientific tables Scientists Cell Theory Characteristics

Unit 2 • • Scientific tables Scientists & Cell Theory Characteristics of Life Microscopes

1. What are the 3 things that should be included in the title? Subject Purpose Unit/measurement

2. What column is the independent variable located? 1 st (far left)

3. What is in the remaining columns? Dependent variables

connect the dots. We draw a 4. We do NOT _______ straight line through the middle to show ____ to show a trend.

5. In scientific writing short and concise sentences are used that are in the _____ form. Active instead of language art type writing that would be considered passive _______writing style.

6. Data tables and graphs should fill approximately how much of the paper space? 75% or 3/4

7. On a graph, what goes on the “X” axis? Independent variable

8. What goes on the “Y” axis? Dependent variable

9. Graphing data should fill most of the graph, how do you calculate the scale? Divide the highest data result by the total number of lines

10. If the data table had the results of 37, 42, 25, & 7 and the graph had 50 lines, what would be the best scale? (. 84 and round up to next. 5)= 1

11. What is the basic/smallest unit of life? cell

12. What keeps a cell small? Surface area

13. What happens to the cell if the volume exceeds the surface area? It bursts

14. How are cells differentiated? -size -shape -Internal organization

15. Pro means_______ nucleus Before and kary means_____.

nucleus 16. Eu means _____ True and kary means______

17. What are the main characteristics of prokaryote cells? -unicellar (bacteria) -composed of DNA, ribosomes, cytoplasm & cell membrane -tiny for a cell

18. What are the main characteristics of eukaryote cells? -multicellular or unicellular -composed of a cell membrane that bounds a nucleus and organelles -Plants, protists, fungi, & animals -larger cells

19. Which cell is larger and by how much? Eukaryote is 1000 x larger than the prokaryote

20. What happened in 1665? Robert Hooke looked at slices of dead cork under a microscope and named the small units “cells”

21. What happened in 1674? Anton van Leeuwenhoek “Father of Microbiology” looked at small living things in pond water under a microscope

22. What happened in 1838? Matthias Schleiden concluded that plants are made up of cells

23. What happened in 1839? Theodor Schwann concluded that animals are made up of cells

24. What happened in 1855? Rudolf Virchow-concluded that new cells are produced from other cells

25. What are the 3 things make up the cell theory? 1 -All living things are composed of cells 2 -Cells are the basic structure and function in living things 3 -New cells are produced from existing cells

26. What are the 8 characteristics of living things? 1 -Made of cells 2 -Reproduce (sexually or asexually) 3 -universal genetic code (DNA & RNA) 4 -obtain & use materials and energy 5 -respond to their environment 6 -grow and develop 7 -maintain stable internal environment (homeostasis) 8 -As a group change over time (evolve)

27. What is homeostasis? Maintain a stable environment (temperature/chemically etc. )

28. Biology is a broad term that covers what? Study of living things

29. What does magnification do? Makes things larger

30. What does resolution do? Makes things clearer

31. What are the advantages and disadvantages of electron microscopes? 2 major advantages- Great resolution and magnification 2 major disadvantages- specimen must be dead & expensive

32. What are the advantages and disadvantages of compound light microscopes? 2 major advantages. Inexpensive and specimens can be alive 2 major disadvantages- poor resolution and magnification

33. What is the most common eyepiece power? 10 X

34. What are the 3 most common objective lenses powers? 4 X, 10 X, & 40 X

35. What is the total magnification when using the 3 different objective lenses? Show your work 4 X 10=40 X 10= 100 X 40 X 10 = 400 X

36. How do you remove bubbles from a wet mount slide? Tap it with an eraser

37. How do you add more water or stain to a completed wet mount slide? • Put a drop on side of slip cover—DO NOT LIFT COVERSLIP!

stain 38. When staining, you add the_____ to one side of the slip cover and draw it across the paper towel specimen by putting _____on the other side of the slip cover.

Know the Microscope parts and functions /mirror/light p. 1070 in book