Observation Station
“The powder is blue.”
Is this qualitative or quantitative?
Qualitative
Which variable does the scientist change on purpose?
Independent
Which variable usually belongs on the x-axis?
Independent variable
Which part of CER answers the question being investigated?
Claim
What is the largest planet in our solar system?
Jupiter
A student sees a puddle outside and says, “It must have rained last night.”
Observation or inference?
Inference
A student tests whether the amount of sunlight affects plant height.
What is the dependent variable?
Plant height
A graph's scale goes:
0, 5, 15, 20, 25, 30
Is this an appropriate scale?
NO missing 10
Which part of CER uses facts, data, or observations?
Evidence
What animal has fingerprints so similar to humans that they can be difficult to tell apart?
Koala
“The rock is rough and has a mass of 24 g.”
Which observation is quantitative?
mass of 24 g
A student tests whether the amount of water affects how tall a plant grows.
Name THREE controlled variables.
Type of plant, soil, pot size, sunlight, length of experiment, etc.
Students compare the number of clothespin squeezes using their left hand vs. right hand.
Bar graph or line graph?
Bar graph
“Plants with fertilizer averaged 17 cm, while plants without fertilizer averaged 11 cm.”
Claim, Evidence, or Reasoning?
Evidence
What is the only mammal capable of true flight?
BAT
Which statement is an inference?
A. The liquid is bubbling.
B. The liquid is 45°C.
C. A chemical reaction caused the bubbling.
D. The liquid is clear.
C. A chemical reaction caused the bubbling.
A student tests whether water temperature affects how long a tablet takes to dissolve.
Identify the IV and DV.
IV = water temperature / DV = dissolving time
A student tests whether hours of sunlight affect plant height.
Their graph has:
X-axis: Plant Height (cm)
Y-axis: Hours of Sunlight
What is wrong?
Axes are switched.
“The plants with fertilizer grew 6 cm taller on average, so the results support the claim.”
Claim, Evidence, or Reasoning?
Reasoning
What food can stay edible for thousands of years when stored properly?
Honey
A student writes:
“The candle is 8 cm tall, the wax feels soft, and it must have been burning for a while.”
Identify each as QL, QN, or I.
8 cm = QN / soft = QL / burning for a while = I
A student gives identical plants different amounts of fertilizer and measures their height after 3 weeks.
Which is correct?
A. IV = height / DV = fertilizer
B. IV = fertilizer / DV = height
C. IV = plant type / DV = fertilizer
D. IV = height / DV = plant type
B. IV = fertilizer / DV = height
Name 4 components a graph must have.
X & Y labels, Title, Appropriate Scale, Data
Two soils were tested:
Soil A = 16 cm average
Soil B = 10 cm average
Which is the best claim?
A. Soil A averaged 16 cm.
B. Soil A helped the plants grow taller.
C. Soil A plants were 6 cm taller, supporting the results.
D. The plants were measured in centimeters.
B. Soil A helped the plants grow taller.
You have 3 apples and take away 2.
How many apples do you have?
2