Name: ______________________
Unit 3 Review:
Microscopes and the Characteristics of Living Things
1. What are the 5 characteristics all living things share?
Made up of cells
that contain DNA
Reproduce
Obtain and Use
Energy
Characteristics of
Life
Sense and respond
to stimuli in their
environment to
maintain
homeostasis
Grow and
Develop
2. How are cheek (animal) cells and onion (plant) cells similar and different?
Similarities
Differences
1. Many cells
2. Have a nucleus
3. Microscopic
1. Different Shapes (cheek cells are oval, onion cells square)
2. Dark line (cell wall) around onion cells
3. Onion cells all together, Cheek cells spread apart
3. How do you calculate magnification of a microscope?
(Explain how)
Ocular lens (eye piece) multiplied by the objective
being used (low, medium or high)
Calculate the magnification.
Low: _4___X__10___=__40___
Medium: _10__X_10__=_100_
High:_40___X_10____=_400__
4. When moving your microscope, one hand should be on the __Arm_________ and the other hand be
supporting the ___
Base_______________ .
5. What power of lens should you always begin with when using a microscope?
Circle: Low
WHY? To
Medium
High
view the most of the slide and to get the object into focus more easily
6. What three ways does an object appear to change when using a microscope?
1)
2)
3)
_ Upside down____________________
_ Flipped backwards_______________
__ Larger (magnified)______________
7. Draw the letter e in the field of view below as you see it with the naked eye and under a microscope.
e
Microscope
e
Naked eye
8. Write the biological level of organization and an example of each level below.
Biological level:
A
M
C
T
O
O
O
P
C
E
B
Atom____________
Molecule_________
Cell______________
Tissue____________
Organ____________
Organ System_____
Organism_________
Population________
Community________
Ecosystem_________
Biosphere_________
Example of each level:
Atom of Oxygen___
Glucose Molecule__
Blood Cell_________
Muscle Tissue______
Heart_____________
 Digestive System___
 Tree_____________
 Herd of Elephants__
 Different fish in a coral reef_
 A mountain range__
 The Earth_________

9. What is the difference between an autotroph and a heterotroph?
Autotrophs can make their own food (plants) heterotrophs must consume
food to live (animals)._____________
10. How many major groups do scientists classify all living organisms into? Five
What are they? Draw an example of each.
Animals
Plants
Fungi
Protista
Bacteria
What makes all of these organisms different? Why do scientists put them into different groups?
They are put in groups based on how they obtain energy (heterotroph or autotroph), how many cells
they have (unicellular or multicellular) and other characteristics. Organisms are put into different
groups based on their characteristics so scientists can learn more about them.
11. What are the steps of the scientific method in order?
Make an observation
Ask a question
Form a hypothesis
Experiment/investigate
Collect and Analyze the data
Communicate the results
12. In which year was there likely an abundance of bluegill food?
1996 This is when the population was the highest
In which year was likely an increase in bluegill predators?
1996 That is when the number of bluegills started to decline
13. What is an investigable question you could ask about Bluegill?
How does an increase in bluegill predators effect
the population of bluegills?
14. Find the mean median and mode of the following data set:
12, 5, 17, 0, 22, 6, 2
Mean:__9.1_______
Median: __6_________
Range: _22__________
15. Is the following collected data qualitative or quantitative?
Qualitative
The wall is orange
The wall is 17 meters in length
The wall is smooth
There are 15 blocks on the wall
Quantitative
X
X
X
X
16. True or False
Cubic centimeters is a unit of measure used for volume.
17. True or False
A balance is a tool used to measure the volume of a liquid.
18. True or False
A triple beam balance is used to measure weight.
19. True or False
Kilometers are a unit of measure for length.
20. True or False
Kilograms is a unit of measure for mass.
21. How can the pictures below be labeled using the vocabulary:
Matter
Atom
Element
Molecule
Compound
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
22. The picture to the right is a picture of an
Label the following particles:
Atom___.
What makes this atom different than
Electron
every other atom? The
number of
protons in the nucleus___.
Proton
This is a picture of an atom of what
Neutron
element? Carbon___.
Carbon in the
only atom with 6 protons in its
nucleus ___.
How do you know?
23. Use the words on the right to fill in the Venn diagram.
Physical Change
FryingBoiling
Chemical Change
Condensing
Burning
Crumpling
Corroding
Meting
Rusting
Crushing
Rotting
Freezing
Photosynthesis
Grindnig
Sublimation
Boiling
Burning
Condensing
Corroding
Crumpling
Melting
Rusting
Crushing
Freezing
Grinding
Rotting
Photosynthesis
Sublimation
Frying
24. Using the words Elements and Compounds, describe what is happening in the following chemical reaction
Two different elements are combining to make a two new compounds.
+
O2
25.
26.
27.
28.
True or False:
True or False:
True or False:
True or False:
2H2
2H2O
In a chemical reaction, brand new atoms are created to make new substance.
In a chemical reaction, atoms are destroyed to create new substances.
In a chemical reaction, atoms are only rearranged to create new substances.
In a chemical reaction, the substances only change states; no new substances are created.