• 7th Grade Tasks


    Task A-1    9-4

    This is your only science notebook. 

    If you don't have THIS task in THIS book, you are NOT prepared!

    Science uses the SI measurement system, also known as metric.

    SI uses base units to change what you are measuring

    and prefixes to change the amount.


    Length - meter

    mass - gram

    volume - liter


    milli = .001              centi = .01            kilo = 1000


    Task A-2     9-5

    SI uses letters as symbols for units.

    meter = m        liter = L        gram = g

    A prefix changes the amount, it also uses a letter.

    To convert...

    • Write down your problem. ...
    • Find the conversion for one unit. ...
    • Multiply your number by the conversion fraction. ...
    • Cancel out your units. ...
    • Multiply with another conversion fraction the same way. ...
    • Cancel units. ...
    • Repeat until the conversion is done.

    1m=1000mm         1m = 100cm    1km = 1000m     10mm=1cm


    1.   200cm=  _____m       

    2.   500mm = _____ m

    3.  10 km = _______ m


    Task A-3                     9-6

    If the SI symbol is one letter, it is the base unit.

    If there are 2 symbols, the first is the prefix

    and the second is the base unit.

    Units are required for ALL numbers.


    234 mL = _______ L

    56 cg = _________ g

    24km = _______  cm

    Challenge:  How many seconds in a week?


    Task A-5       9-10

    1mL = 1cm3

    Density = the amount of stuff in a space.
    mass/volume = density
    1.  What is the density of a rock that has a
    volume of 4cm3 and a mass of 2g?

    2.  Mass 10g and volume 5cm3?

    3.  Volume of 20mL and mass of 2g?

    1. Which objects above will float in water?

    TASK A-6            9-11

    Scientific Inquiry is the only method humans

    have to be sure they are not wrong.

    Steps of a Lab Report:
    Question or Problem - what the whole experiment is about

    Research - find out what is already known

    Hypothesis - what you think might be an answer to the question

     Finish the saying:

    Less dense floats...  


    Task A-7         9-12

    Procedure - step-by-step directions
    Data - what happened during the experiment
    Data analysis - graphs and calculations

    Conclusion - Hypothesis supported or not, restate data,

    summarize experiment, identify possible errors


    When you are finished copying,

    place a question in the Schoology Discussion

    Task A-8       9-13
    1.  What is the difference between mass and weight?
    2.  What is your weight in space (between planets)?
    3.  Why does science use mass instead of weight?
    4. How do you calculate volume in cm?
    5. How do you measure volume in mL?
    Can you juggle?  
    1. What would you need to do to learn to juggle?
     TASK A-9      9-14

    A variable is something that changes in the experiment.

    Independent (manipulated, experimental) variable - the thing being tested,the scientist changes this (the cause). EMI variable


    Dependent (responding) variable - what changes because the

    independent variable changed (the effect). RD variable


    If we are trying to find "Which detergent removes the most blood stains?"

    1. What is the EMI variable?
    2.  What is the RD variable?


    Task A-10                     9-17

    control group does NOT get the EMI variable.

    controlled variable is anything that can affect the experiment, 

    so we have to keep it the same.

    1.  What do we learn by using a control group?
    1.  In the "detergent" example, what things do we need to keep

           the same when we are washing the clothes?


    TASK A-11                9-18

    A scientist is trying to find out how caffeine affects people's heart rate.

    What could be the:



    EMI variable:

    RD variable:

    Controlled variables:

    Control Group:


    Task A-12          9-19

    quantitative - data you can count

    qualitative - data based on a characteristic like color 

    What does "superstition" mean?

    Humans are superstitious. 

    Write down as many "old wives' tales" as you can think of.

    Example:  Step on a crack, break your mother's back

    • Sitting too close to the television screen is bad for your eyes.
    • Don't go outside with wet hair or you will catch a cold.
    • Don't swallow gum or it will stay in your stomach for seven years.
    • Don't make silly faces or it will make the silly face permanent.
    • Chocolate leads to acne.
    • Eating carrots will improve your vision.
    • Shaving makes the hair grow back thicker.

    Go to https://www.pgsd.org/Domain/9

    Scroll to QuickLinks:  McGraw Hill Science

    Period 7: 2InbXc7b

    Period 8: 7u6kayLB


    Task A-13        9-20

    An observation is something that your senses tell you.
    An inference is a hypothesis about why the observation happened.  
    Circle the observations, underline the inference. 
    An animal print is found in the mud and the cooler's lid
    is ripped off and is empty, a bear must have been here.
    Quiz tomorrow on Inquiry.
    1.  What do you think will be on the quiz?
    2.  How do you prepare for quizzes?
    TASK A-14    9-21

    Pseudoscience uses scientific sounding words

    to convince people of something that is not supported by science.

    It often involves things that cannot be disproved.
    List any examples of pseudoscience that you know about.

    Example:  Horoscopes


    Task A-15         9-24

    Many people "believe" in things that are not supported by science.

    Key words that are often used: 

    energy, healing, crystals, power, detox

    We will be using the textbook on ipad, 

    make sure you can open it!