Lab Report Template

Learn How it works

1. Title: what you tested, e.g. “Effect of Salt on the Boiling Point of Water.”
2. Question / purpose: what you wanted to find out.
3. Hypothesis: an if–then–because prediction.
4. Variables: independent (what you change), dependent (what you measure), and controlled (what you keep the same).
5. Materials and procedure: numbered steps someone could follow.
6. Data: a table with units in the headers, and a graph.
7. Analysis: what patterns does the data show? Include calculations.
8. Conclusion: was the hypothesis supported? Use data as evidence. Name sources of error and next steps (CER: Claim, Evidence, Reasoning).

Examples See it done

Hypothesis: If more salt is added to water, then the boiling point will increase, because dissolved particles make it harder for water molecules to escape as vapor.

Conclusion (CER): Adding salt raised the boiling point of water. With 0 g of salt water boiled at 100.0 °C, and with 30 g it boiled at 101.2 °C, an increase in all three trials. This supports the hypothesis: dissolved salt particles lower the water's vapor pressure, so it must be heated more to boil. A possible error is that the thermometer touched the bottom of the pot.

Try it Fill in your lab report

Data table

Practice Check yourself

Answer, then tap Check. You get an explanation either way.

1. In an experiment testing how fertilizer amount affects plant height, what is the dependent variable?

   Fertilizer amount Plant height Type of pot
   Check

2. Which part of CER uses your data?

   Claim Evidence Reasoning
   Check

3. Where do units belong in a data table?

   After every number In the column headers Nowhere
   Check