ACT Science Test 5

Front

What is the significance of the %O2 level in relation to paleo wildfires?

Back

The %O2 level is crucial because it determines the flammability of materials; paleo wildfires could only occur when %O2 was higher than 15.

Front

What does 'inconsistent' mean in a scientific context?

Back

Inconsistent means that the data does not support or align with a particular claim or hypothesis.

Front

What is the approximate %O2 level in Earth's atmosphere today?

Back

The %O2 level in Earth's atmosphere today is about 21.

Front

How can we determine the number of paleo wildfires from the rock record?

Back

The number of paleo wildfires can be determined by analyzing geological data and records from specific time intervals.

Front

What is the relationship between %O2 levels and flame duration for different materials?

Back

Higher %O2 levels can lead to longer flame durations for materials like dry paper compared to pine wood.

Front

What time interval during the Mesozoic era had %O2 levels inconsistent with paleo wildfire claims?

Back

The time interval 180-160 mya had %O2 levels inconsistent with the claim that wildfires could only occur above 15%.

Front

At what time during the Mesozoic era was %O2 closest to today's levels?

Back

The %O2 level was closest to today's levels at 200 mya.

Front

How many paleo wildfires are recorded between 95 mya and 85 mya?

Back

There are 4 known paleo wildfires recorded between 95 mya and 85 mya.

Front

What is the flame duration difference between dry paper and pine wood at 17% O2?

Back

The flame duration for dry paper was approximately 6 seconds greater than for pine wood at 17% O2.

Front

What is the Mesozoic era?

Back

The Mesozoic era is a geological time period that lasted from about 252 to 66 million years ago, known for the dominance of dinosaurs.