Three possible observations are proposed to test these claims, as shown in the chart. Indicate If each observation would support each Claim 1 or Claim 2 by selecting the check boxes in the chart.
Claim 1: The loss of energy is due to the air pushing back on the train as it moves down the track.
Claim 2: The loss of energy is due to the friction of the train wheels with the track.
Answers:
The train moved faster after the cars are streamlined.
The tracks are warmer after the train has passed.
The train moves faster after oil is applied to the wheels and tracks.
Observation 1: The train moved faster after the cars are streamlined.
- Supports: Claim 1
Observation 2: The tracks are warmer after the train has passed.
- Supports: Claim 2
Observation 3: The train moves faster after oil is applied to the wheels and tracks.
- Supports: Claim 2