🌍 Unit 1 Flashcards

How many continents are there?

7

Name the 7 continents.

Africa, Antarctica, Asia, Oceania, Europe, North America, South America

Which continent do we live on?

North America

How many oceans are there?

5

Name the 5 oceans.

Atlantic, Pacific, Indian, Arctic, Southern

Which ocean are we closest to?

Atlantic

What does GNI per capita mean?

Total income of a country divided by its population

What is used to classify countries by income level?

Gross National Income (GNI) per capita

What is sustainability?

Using resources at the same rate they are replenished

Another definition of sustainability?

Meeting present needs without harming future generations

Give an example of sustainability.

Spending less money than you earn

What are non-renewable resources?

Resources that take millions of years to replenish

Name some renewable resources.

Light, air, soil, forests, energy

Give 3 ways to live sustainably.

Save energy, recycle, use reusable items

What does the hydrologic cycle show?

Movement of Earth's water

What % of water is in oceans?

97.5%

What % is usable freshwater?

0.024%

What powers the water cycle?

Solar energy and gravity

What is residence time?

Time water stays in one place

How long does water stay in oceans (avg)?

~3,000 years

What is groundwater stored in?

Aquifers

What is a watershed?

Land that drains water to a common outlet

What separates watersheds?

Divides

What is the atmosphere?

Layer of gases surrounding Earth

What does the atmosphere protect us from?

UV radiation

Main gases in atmosphere?

Nitrogen (78%), Oxygen (21%)

Where does weather occur?

Troposphere

Where is the ozone layer?

Stratosphere

What is shortwave radiation?

Energy from the sun

What is longwave radiation?

Heat emitted by Earth

What is the greenhouse effect?

Heat trapped by gases warming Earth

Name greenhouse gases.

CO₂, methane, water vapor, nitrous oxide

What happens if greenhouse gases increase?

Global warming

What are abiotic factors?

Non-living (water, air, soil)

What are biotic factors?

Living organisms

What is carbon?

Element essential for life

What processes move carbon?

Photosynthesis, respiration, decomposition, combustion

What does photosynthesis do?

Plants take in carbon

What does respiration do?

Releases carbon

Human impact on carbon cycle?

Burning fossil fuels increases CO₂