Tuesday, September 10, 2013

Unit 1 Scientific Method: Day 19 - Scientific Method Unit Review



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Scientific Method Day 19: Unit Exam Review
Learning Goal 1: Testability

1) Write if the following questions are testable. Label them and write “T” for testable and “NT” for testable.
                                                                        
______ How many ants live in an anthill?

______ How do different amounts of caffeine affect student’s energy levels?

______ What happens when you mix gasoline with acetone?

______ Why do fish float when they die?

______ Which substance has a lower melting point: iron or tungsten?

2) Do the same for these hypotheses.

______ If I change between three different brands of battery, then Energizer will last the longest.

______ If I test the acidity of certain substances, then I will clean up afterwards.

______ Dogs make the best pets.

3) Make the following questions testable.

“Why can’t ostriches fly?“

Subject: ____________________

How are you going to change it? ___________________

Question:

“Does ______________________________________________ affect __________________________________________________?”

“What is the best cereal?”

“_____________________________________________________________________________________________________________?”





Learning Goal 2: Observations

4) Label the observations as Quantitative (QNT) or qualitative (QL).

______ The scoopula holds 4 grams of powder.

______ The organism looks like a sponge.

______ There are four children in the restroom.

5) Which of the following is an example of an inference?

a)    The substance looks and feels like gelatin.
b)   The substance has a sticky texture.
c)    The substance must be modeling clay.
d)   The substance weighs 6.2 grams.

6) Make three observations about the picture. One observation must be quantitative and one observation must be a comparison.

Description: http://www.pizzahutpizza.com/menu/_images/three_hand_tossed_pizzas.jpg
·      _______________________________________________________


·      _______________________________________________________

·      ________________________________________________________





7) Measure the length of this object. Write your answer in centimeters and millimeters.


_________ cm
_________ mm



8) How many centimeters is 80 millimeters?






Learning Goal 3: Lab Safety and Equipment

9) Fill in the missing parts of the table.
Equipment
Function
Picture
Erlenmeyer flask





Most common for holding and carrying liquids


Pipette
Transfers small amounts of liquid


Funnel




Test tube
Holds small amounts of different liquids


Burner





10) Explain/restate the following lab safety rules in your own words:

Protect your eyes and nose
_________________________________________________________________________________________________________________

Wait for permission
_________________________________________________________________________________________________________________

Handle with care
_________________________________________________________________________________________________________________

11) As part of an experiment, Julio is taking samples of pond water. He needs to hold several different samples of pond water and work with them at the same time. He is removing small amounts of the pond water and looking at it for tiny microorganisms.
·      He will need ______________________ because ________________________________________________________
___________________________________________________________________________________________________________.

·      He will need ______________________ because ________________________________________________________
___________________________________________________________________________________________________________.

·      He will need ______________________ because ________________________________________________________
___________________________________________________________________________________________________________

Learning Goal 4: Variables

12) Why are constant variables important? (One sentence)



13) Write how you figure out each variable. One is done for you.

Independent Variable: ___________________________________________________________________________

Dependent Variable: ___________________________________________________________________________

Constant Variable: The variable that you want to keep the same.

14) Find the variables in this testable question.

“How does different humidity affect the amount of mold in a house?

IV: __________________________________                     DV: ___________________________________________

15) Find the variables in this experiment.

To train her dog, Marlene decides to perform an experiment. She offers her dog three different types of treats – a hard biscuit, a piece of bacon, and a tomato. She then records how many times her dog performed an action (sitting down) in order to get the treat.

IV: __________________________________                     DV: _____________________________________________

Constants (at least 2):

_____________________________________________

_____________________________________________


16) Why can’t you have two independent variables in one experiment?









Learning Goal 5: Measuring Sense

17) Write the benchmark for each unit.



Grams ______________________________________

Milligrams _________________________________

Kilometer __________________________________

Meter ______________________________________

Centimeter ________________________________

Liter _______________________________________

Milliliter ___________________________________



18) T/F: Mass is the amount of space an object takes up. ______________________________________

19) T/F: An object with a large volume must have a large mass. _________________________________

20) Write the base unit that measures –

Volume: ________________________________

Mass: ___________________________________

Length: _________________________________

21) What unit would you use to measure…

The mass of a dresser? ________________________________________

The height of your uncle? _____________________________________

The mass of a single sticky note? _____________________________

The mass of a glue stick? ______________________________________

The volume of a bathtub? ______________________________________

22) How many grams are in a kilograms?


23) How many centimeters are in a meter?


24) How many millimeters are in a meter?



Learning Goal 6: Data

25) Work the data table and answer the questions.

Original Question: “How does the type of liquid affect its boiling point?”

Liquids and their Boiling Points

Liquid
Starting Temperature
Boiling Point
Oil
30° C
92° C
Salt Water
30° C
100° C
Vinegar
30° C
121° C

What was the boiling point of vinegar? ____________________

What was the difference between the boiling point of vinegar and the boiling point of salt water, in degrees Celsius? _________________

IV: _______________________________________                          DV: _____________________________________

The data shows that _________________________________________________________________________________.
This means that _____________________________________________________________________________________.

26) Find the missing average in the data below.

Mouse 1
6 cm
Mouse 2
13 cm
Mouse 3
11 cm
Average:
???????

_____________ cm

27) Look at the data and answer the questions.

Sport
Average Weight of Player
Football
76 kg
Soccer
68 kg
Baseball
78 kg
Basketball
72 kg
Tennis
70 kg

What is the average weight across all sports?


What sport has the lowest average weight?

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