Download WS 2.4 How Scientists Classify Living Things

Scaffolding Master 2.4
Name: _________________________________ Date: ________________________
Section 2.4: How Scientists Classify Living Things
Key Question: How do scientists classify living things?
BEFORE YOU READ
Look at the headings in Section 2.4. How will they help you understand how scientists
classify living things?
WHILE YOU READ
Write brief notes as you read this section.
One Cell or More
1. Using microscopes, scientists discovered that organisms had different internal features.
Some organisms, such as _________________________, are only one cell.
• _________________________________________________________________
• _________________________________________________________________
Other organisms, such as _________________________, are more complex.
• _________________________________________________________________
• _________________________________________________________________
• _________________________________________________________________
Plant and Animal Cells
2. Use the following Venn diagram to list the features found in plant and animal cells.
Only in
Plant Cells
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Chapter 2 Scaffolding Master 2.4
Only in
Animal Cells
Copyright © 2006 by Thomson Nelson
Scaffolding Master 2.4 (continued)
Name:
_________________________________________
Date: ________________________
Section 2.4: How Scientists Classify Living Things (continued)
The Five-Kingdom Model of Living Things
3. The names of the five kingdoms are _____________________________________
________________________________________________________________ .
4. The kingdom with only unicellular organisms is ___________________________ .
5. The kingdom with both unicellular and multicellular organisms is
________________________________________________________________ .
6. The kingdoms with multicellular organisms are
________________________________________________________________ .
An International Classification System
7. Why do scientists classify organisms into smaller groups?
________________________________________________________________ .
________________________________________________________________ .
8. What are the seven categories that are used in Linnaeus’ classification system?
________________________________________________________________ .
________________________________________________________________ .
9. What can organisms that belong to the same species do?
________________________________________________________________ .
________________________________________________________________ .
AFTER YOU READ
Use what you’ve learned to classify each of the following organisms into one of the five
kingdoms:
(a) This organism has four sharp claws so that it can climb trees and capture its prey.
(b) This organism is smaller than the tip of a pin, but its cells can do everything it needs to stay
alive.
(c) This organism cannot move around by itself, but it can make its own food.
(d) This organism attaches to and feeds off other organisms.
(e) This organism is only one cell, but it is just as important as other living things.
Create a memory helper that will help you remember either
• the order of the seven categories in Linnaeus’ classification system, or
• the five-kingdom classification of living things
Share your memory helper with a classmate.