Claim
A statement that answers a question
What is a claim?
What is evidence?
Data, observations, or facts that support a claim.
What is reasoning?
Why the evidence supports the claim.
MYTH OR REAL: Humans only use 10% of their brains.
Myth
What planet is known as the Red Planet?
Mars
Claim, evidence, reasoning
What does CER stand for?
Which is evidence?
A. “The plant grew because it received sunlight.”
B. “The plant grew 12 cm in 10 days.”
B
Reasoning should connect evidence to what?
The claim using scientific ideas/concepts.
MYTH OR REAL? Lightning can strike the same place more than once.
Real
What force pulls objects toward Earth?
Gravity
Where does your claim go in your CER?
At the beginning
Give two examples of scientific evidence.
Measurements, observations, data tables, graphs, experimental results, etc.
A student claims that increasing the amount of sunlight helps plants grow taller. Their data shows that plants receiving 8 hours of sunlight grew 10 cm, while plants receiving 2 hours grew 4 cm. What reasoning best connects the evidence to the claim?
A. Plants need water to survive.
B. The plants were different sizes at the beginning.
C. More sunlight provides plants with the energy they need for photosynthesis, which can support greater growth.
D. The plants were measured at the end of the experiment.
C
MYTH OR REAL? Heavier objects always fall faster than lighter objects.
MYTH
What organ pumps blood throughout your body?
Heart
Which is a stronger claim?
A. “I think plants need sunlight.”
B. “Plants exposed to sunlight grow better than plants kept in darkness.”
B “Plants exposed to sunlight grow better than plants kept in darkness.”
A student says, “The heavier object falls faster.” What evidence would you want to see before accepting the claim?
Data comparing the fall times of objects with different masses.
What is missing in this reasoning?
“The temperature increased from 20°C to 35°C.”
Reasoning explaining why the temperature increased.
MYTH OR REAL? Seasons are caused mainly by Earth's tilt on its axis.
Real
What gas do plants take in during photosynthesis?
Carbon Dioxide
Create a claim for this question:
Does increasing the amount of sunlight affect plant growth?
Answers my vary
A student claims that plants grow better with fertilizer. Which piece of data would best support the claim?
A. The plants were all green.
B. The fertilized plants grew an average of 12 cm, while the unfertilized plants grew an average of 7 cm.
C. The student thought fertilizer would help.
D. The plants were placed in the same room.
B
Why isn't simply repeating the evidence considered good reasoning?
Repeating evidence doesn't support your claim, you must explain WHY the evidence is important.
MYTH OR REAL? Water always boils at exactly 100°C.
MYTH — boiling point depends on atmospheric pressure.
What is the process called when water changes from a liquid into a gas?
Evaporation