Question

does the length of the pendulum affect the period of the pendulum?
identifying components of cer
use the following information to answer the question about claim, evidence, and reasoning.

experiment:
a period can be thought of as the length of time required to complete one swing of a pendulum.

four pendulums with different lengths of string, but the same mass, are dropped from the same angle. the number of swings in 30 seconds is measured for each pendulum.

data table:
length (m) | swings (in 30 sec)
0.2 | 28

which of the following would be a claim for a cer?

• the length of the pendulum does not affect the period
• the length of the pendulum affects the mass
• the length of the pendulum affects the period

Explanation:

Identify the scientific question

The experiment investigates: "Does the Length of the Pendulum Affect the Period of the Pendulum?"

Define a scientific claim

A claim must directly answer the research question being investigated.

Evaluate the given options

• Option 1: "The length of the pendulum does NOT affect the period" directly answers the question.
• Option 2: "The length of the pendulum affects the mass" does not answer the question about the period.
• Option 3: "The length of the pendulum affects the period" directly answers the question.

Since the physical reality is that pendulum length does affect its period (longer length increases the period, resulting in fewer swings), the correct claim answering the question is that the length of the pendulum affects the period.

Answer:

• The length of the pendulum does NOT affect the period
• The length of the pendulum affects the mass
• The length of the pendulum affects the period (Correct answer)