Download Life Science Final Review

Name;_______________________
Life Science Final Review
1. What’s the purpose of an experiment?
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2. After collecting data from an experiment, what is a helpful thing to do to analyze the data more easily?
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3. Lisa loves paper airplanes with winglets. For an experiment she makes:
One plane with a blunt nose and winglets (#1)
One plane with a pointed nose and no winglets (#2)
She throws both planes 10 times and #1 flies farther every time. She concludes that winglets help paper planes fly
farther. Give a possible alternative explanation for why #1 flew farther?
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4. You are trying to answer the question: do winglets help paper airplanes fly farther. You conduct an experiment
and get the results below.
Fig 1
What would be the best conclusion?
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5. For a science project Susie wants to compare the densities of different types of wood. She gets a block of pine and
the same size block of oak. She finds two of the same sized nails, (but one is made of steel and the other is made of
aluminum). She finds two of the same hammers. Then she recruits her younger brother to help her. It takes Susie 10
strikes to pound the steel nail all the way into the pine. It takes her younger brother 23 strikes to hammer the
aluminum nail into the oak. Susie concludes that the oak is denser. Why is her conclusion unreliable?
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6. Why do cells (of a multicellular organism) divide? Give two main reasons.
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7. Give four differences between animal cells and plant cells.
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8. List three differences between prokaryotic cells and eukaryotic cells, including what kinds of organisms are made
up of each of these types of cells.
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9. Describe the function of DNA.
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10. What is a gene?
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11. Analyze the follow graph. What are two inferences can you make about the predator-prey cycle.
Fig. 2
- - - - = Predator
____ = Prey
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12. Biological organization helps explain how all life on earth is organized. List the 9 levels of organization from
smallest to largest.
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13. The human body contains approximately 300 different types of cells. Each of those cells looks different. Explain
why Nerve cells and Red blood cells look so different.
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14. Describe 3 ways that human activities can change the number of populations in an ecosystem and then
explain what would happen if our actions destroyed one entire population, what effect would that have on
other populations found there?
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15. Using the following food web. Identify an example of roles the following organisms could play in the
ecosystem.
Decomposer:
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Producer:
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Primary Consumer:
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Secondary Consumer:
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Tertiary Consumer:
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Fig. 3
16. Using Fig. 3, give an explanation why the Fox has less energy available to him than the squirrel does.
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17. Scientists use layering of the earth to determine age of organisms. The further down in the earth, the older they
are. Using figure 4. put the following organisms in order from oldest to youngest.
Youngest:
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Oldest:
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18. Fill in the following table. Mark an ‘X’ if an organism has each trait.
Hair
Four Limbs
Amniotic egg
Eggs with Shells
Bones
Amphibians
Primates
Rodents & Rabbits
Crocodiles
Birds
Which group of animals are the rodents and rabbits most closely related to? ________________________
Which group of animals are the crocodiles most closely related to? ___________________________
Which characteristic do all five types of animals have in common? ______________________________
19. The human body requires several systems functioning together to maintain homeostasis, the bodies
maintenance of a stable internal environment. Match each system to the reason why it is vital to the body’s
ability to maintain homeostasis.
Digestive System _____
A.
Skeletal System_____
B.
Respiratory System_____
C.
Nervous System_____
D.
Circulatory System_____
E.
Provides all of the body’s cells with fresh oxygen and
removes the waste product carbon dioxide
Responds to the body’s internal and external
environment by using a series of electrical and
chemical signals
Breaks down our food and provides all of the body’s
cells with nutrients
Provides protection, support and structure along with
making our bodies blood cells.
Transport system for our body. Circulates oxygen
and nutrients to all the cells of our body.
20. If an organism is born with traits that help it survive or attract mates what will happen? What is this called?
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21. Selective breeding is the process of breeding plants and/or animals for particular genetic traits. Which traits
would farmers look for when raising corn?
A.) Bigger ears of corn
B.) Disease resistant corn
C.) Sweeter corn
D.) All of the above
22. Write true if the statement is TRUE or FALSE if the statement is false.
________ The skin is not an important defense the body has.
________ Sneezing removes pathogens from your nose.
________ Sweat, mucus, tears, and saliva are all types of barriers used to protect you.
________ The immune system cannot protect you from cancer cells
_____ ___White blood cells fight infections and get rid of debris.
________ Only bacteria and viruses can infect our bodies and make us sick.
________ Vaccines inject living viruses into your body and have a high chance of making you ill.
23. Use the following vocab words to fill in the diagram below.
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Glucose
Energy
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Water
Carbon Dioxide
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Oxygen
24. Use the follow four elements to answer the questions below.
2
He
Helium
4.003
5
B
Boron
10.81
11
Na
Sodium
22.990
17
Cl
Chlorine
35.453
What is the atomic number for Chlorine? __________
What is the atomic mass for Boron? ___________
How many protons are in an atom of Na? _________
How many neutrons are in an atom of He? ___________
How many electrons are in an atom of Cl? _________
25. Fill in the venn diagram below to compare and contrast elements and compounds.
Elements
Compounds
26. What are the products and reactants in this equation?
2H2 + O2
→
2H2O
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_______________ are the reactants____________ is/are the products
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In this reaction, there ________ hydrogen atoms and ________ oxygen atoms react to produce
_________molecules of water.
27. Match up the following pieces of lab equipment to the tasks below.
Holding 50 mL of boiling water ____
Weighing out 120 grams of sodium chloride_____
Measuring exactly 43 mL of water_____
Measuring the length of a lab table______
Viewing microscopic organisms_____
A.
B.
C.
D.
E.
Beaker
Graduated cylinder
Balance
Microscope
Meter Stick