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.
- 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?
- 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
Can you juggle?1. What would you need to do to learn to juggle?TASK A-9 9-14
- What is the difference between mass and weight?
- What is your weight in space (between planets)?
- Why does science use mass instead of weight?
- How do you calculate volume in cm?
- How do you measure volume in mL?
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?"
- What is the EMI variable?
- What is the RD variable?
Task A-10 9-17
A control group does NOT get the EMI variable.
A controlled variable is anything that can affect the experiment,
so we have to keep it the same.
- What do we learn by using a control group?
- 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:
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 9-20An 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 lidis 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.
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!