Scientific Explanation Rubric:



Scientific Explanation Practice 1 Worksheet

Use the rubric and outline below to practice writing a Scientific Explanation. Once you understand the process you will need to move up to the Practice 2 worksheet. Eventually, you should be able to write a Scientific Explanation independently using the Mastery Worksheet.

Components:

There are three main components to a complete scientific explanation:

1. Claim: The claim makes a statement or conclusion that addresses the original testable question.

2. Evidence: The evidence supports your claim using scientific data. This data can come from an investigation or from another source like observations, readings or someone else’s data, It needs to be both appropriate and sufficient to support the claim. Appropriate data is relevant to the problem and helps determine and support the claim. Sufficient means you have enough data to convince someone else of the claim. Sufficient evidence might require multiple pieces of data.

3. Reasoning based on scientific principle(s): The reasoning links the claim and evidence and shows why the data count as evidence to support the claim. This usually includes one or more scientific principles.

Scientific Explanation Rubric: For each component you need to reach a score of 3.

|Component |Score 3 |Score 2 |Score 1 |

|Claim: A conclusion |Makes an accurate and complete claim |Makes an accurate but incomplete claim.|Makes an inaccurate or unclear claim. |

|that answers the original question. |using clear language and complete |Language could be clearer but uses |Doesn’t use complete sentences. |

| |sentences. |complete sentences. | |

|Evidence—Scientific |Provides appropriate |Provides appropriate but insufficient |Provides inappropriate |

|data that supports the claim. The data |and sufficient evidence to support |evidence to support claim. May include |evidence |

|needs to be appropriate |claim. |some inappropriate evidence. |(evidence that does not support claim).|

|and sufficient to support the claim. | | | |

|Reasoning—A justification |Provides reasoning |Provides reasoning |Provides reasoning |

|that links the |that links evidence |that links the claim |that does not link evidence to claim. |

|claim and evidence. |to claim. Includes |and evidence. Repeats the evidence | |

|It shows why the data |appropriate and |and/or includes some—but not | |

|count as evidence |sufficient scientific principles. |sufficient—scientific principles. | |

|by using appropriate | | | |

|and sufficient scientific principles. | | | |

Source: Science as Inquiry in the Secondary Setting Edited by: Julie Luft, Randy L. Bell, and Julie Gess-Newsome

1. Claim: Use your testable question to format your claim into a statement that answers it.

For example:

Testable Question: How does the amount of sunlight affect the growth in height of a bean plant?

Claim: Bean plants with the most hours of sunlight grow taller than bean plants with less hours of sun.

Testable Question:

Your Claim:

2. Evidence: Summarize each piece of data supporting your claim in one or two sentences.

For example:

Plants grown in 7 hours of sunlight each day grew an average of 3 cm taller than the plants grown in 5 hours of sunlight and 5cm taller than those grown in 3 hours of sunlight. Plants grown in the dark did not grow at all and their leaves turned yellow after 3 days.

3. Reasoning: Connect the claim and supporting evidence to a known scientific principle or idea.

For example: Plants use sunlight to make food through photosynthesis and the more light they get the more food they are able to make and use to grow tall.

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