Transcript Claims, Evidence & Reasoning

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April 2, 2013
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◦ TEXT . . . .
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What is reasoning in a scientific explanation?
How do I help my students with reasoning
when making a scientific explanation?
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I understand the difference between evidence
and reasoning at the middle school level.
I have ideas and a plan to require students to
do some reasoning when making a scientific
explanation.
I know the homework assignment to be
completed before April 23rd (at the Stanford
Center)
What do you now know about the “Reasoning”
element of the CER framework? (Record your
ideas.)
What do you now know about the “Reasoning”
element of the CER framework? (Record your
ideas.)
Read the 7th Grade Vignette on page 1 – 3.
Mark (**) places where students are using
reasoning to support their claims.
Be ready to share an idea – I may call
on you if I don’t get any volunteers.
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Read pages 24 – 25 on REASONING
Underline the most important sentence in
that section related to student reasoning
Be ready to share . . .
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Identify a recorder/reporter and a time
keeper
Discuss:
1. Where is the reasoning in our assigned student
sample?
2. What is the quality of the student reasoning in our
assigned student sample?
3. What did you know about “reasoning” but now see
in a different light?
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What type of pulley system requires the least force to
move the block?
A pulley system with two moveable pulleys and one
fixed pulley required the least amount of force to
move the block. This system took an average of 0.82
Newtons to move the block. We tried three other
systems, but the closest one was still 0.23 Newtons
more, because it required 1.05 Newtons. (Evidence)
The fixed pulleys just change the direction of the
force, while moveable pulleys reduce the amount of
force. Using one fixed, let us have two moveable
pulleys, which decreased the force more than just
having one moveable pulley.
What will happen to the shark population if the
Phytoplankton populations die out?
The shark population will die out. The shark eats
other fish such as the ocean fish and the lantern
fish. The ocean fish and the lantern fish eat other
organisms such as shrimp and copepods. The
shrimp and copepods eat the phytoplankton. All
of the other organisms in the food web depend
on the phytoplankton, even if they do not directly
eat them. Organisms are affected by other
organisms in a food web even if they are not
directly linked to them.
Mr. Garcia: Do you think the climate is changing? Make
sure you support your idea with evidence and reasoning.
Olivia: I think the climate is changing because this fall has
been really warm.
Mariela: Does being warm just one fall count as evidence
for climate change?
Nate: No, climate is long term changes. It is just weather if
it is one day or a month or a season. So I agree with Olivia
that the climate is changing. But I think it is changing
because the air temperature has slowly gotten warmer
over a long time. The average temperature has increased
like 2 degrees in the last 100 years.
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Group 1: Physics Example
◦ Phone number: 712-429-0690
◦ Participant code: 899847#
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Group 2: Biology Example
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Group 3: Environmental Science Example
◦ Phone number: 712-429-0690
◦ Participant code: 288019#
◦ Phone number:712-429-0690
◦ Participant code: 991094#
Pulley: By Sai K shanmugam,shanmugamstudio,Kollam (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via
Wikimedia Commons
Shark: By TANAKA Juuyoh (田中十洋) (Shark) [CC-BY-2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
Climate Change: By Victor Korniyenko (From Wiki.) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
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Group 1: Physics Example
Group 2: Biology Example
Group 3 : Environmental Science Example
Assignment: Write a scientific explanation that _______________________
Claim:
(Write a statement that responds to the original problem about ________)
Evidence:
(Provide scientific data to support your claim about __________________)
Reasoning:
Write a statement that tells why your data counts as evidence to support
your claim about ____________________________________________________
Your statement should include scientific principles that defend your
claim and evidence.
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Write a scientific
explanation that states
whether new substances
were formed after
combining baking soda,
powdered sugar, rock
salt and phenol red.
 3 – Learnings (or things you see differently)
 2 - Ideas to take away
 1 – The most important thing that we
discuss during our next ONLINE follow-up
event