BEC NYC 245 Part 2 Study Guide

Front

Which gas do green plants remove during photosynthesis?

Back

Carbon dioxide

Answer explanation

Plants take in CO₂ and release O₂.

Front

Deforestation in a region would most directly lead to…

Back

Lower oxygen production

Answer explanation

Fewer trees means fewer oxygen‑producing organisms.

Front

Ruminant livestock are significant sources of which greenhouse gas?

Back

Methane

Answer explanation

Ruminants emit methane from digestion.

Front

A heavily industrialized city with minimal trees will most likely experience…

Back

Higher rates of breathing problems

Answer explanation

Emissions + limited vegetation degrade air.

Front

If forests are removed and livestock numbers rise, which air change is most likely?

Back

CO₂ increases, O₂ decreases

Answer explanation

Less plant uptake, more animal respiration.

Front

Which component makes up most of Earth’s atmosphere? Options: Oxygen, Nitrogen, Carbon dioxide, Water vapor

Back

Nitrogen

Answer explanation

Nitrogen ≈ 78%.

Front

The warming due to heat-trapping gases is known as the…

Back

Greenhouse effect

Answer explanation

GHGs absorb and re‑emit IR radiation.

Front

Planting street trees primarily helps by…

Back

Improving local air quality

Answer explanation

Leaves intercept particulates; plants absorb CO₂.

Front

Which group produces a large fraction of Earth’s oxygen? Options: Volcanoes, Oceanic phytoplankton and land plants, Seawater salts, Mineral soils

Back

Oceanic phytoplankton and land plants

Answer explanation

Photosynthetic organisms generate most O₂.

Front

Cutting tailpipe emissions primarily reduces…

Back

CO₂ and particulates

Answer explanation

Vehicles emit CO₂ and PM.