Which gas is the primary cause of global warming?

Which layer of the atmosphere contains the ozone layer?

What is the main source of energy for Earth?

Deforestation primarily contributes to which global issue?

Which of the following is a renewable resource?

What do we call the variety of life on Earth?

What is the process of plants making their own food called?

Which of the following is a greenhouse gas?

Which human activity is a major cause of air pollution?

The gradual increase in Earth’s temperature is known as:

What is the largest source of freshwater on Earth?

Which term refers to species no longer found anywhere on Earth?

Which practice helps reduce waste?

Acid rain is mainly caused by which pollutants?

What do you call the water cycle process where water vapor becomes liquid?

Which ecosystem has the greatest biodiversity?

Soil fertility can be improved by:

What is a habitat?

Which of the following is an example of pollution?

The process of breaking down organic matter is called:

Overfishing mainly affects:

What is the main cause of ozone layer depletion?

A food chain always begins with:

What is sustainable development?

What is the main cause of water pollution?

Which is an example of a nonrenewable resource?

What is the smallest unit of an ecosystem?

Which activity helps conserve water?

What is the natural warming effect of Earth’s atmosphere?

Which layer of Earth contains the tectonic plates?

What is a community in ecology?

Which of the following is an abiotic factor?

Planting trees helps reduce:

Which disaster is caused by excessive rainfall and poor drainage?

What is the main cause of species extinction?

What is the term for water beneath Earth’s surface?

The energy flow in an ecosystem is best represented by:

What is composting?

Renewable resources are those that:

What is the purpose of recycling?

Oil spills mainly affect:

Which of the following is a decomposer?

What do we call rainwater that cannot enter the soil and instead flows over land?

Which country is most affected by coral bleaching?

Which of the following is an example of climate, not weather?

What is the main cause of smog in urban areas?

What is the process through which plants release water vapor?

Coral reefs are often called:

Which practice protects natural resources for future generations?

What is the variety of life on Earth called?

What is the maximum number of individuals an environment can support?

What do we call the study of relationships between living things and their environment?

Which term refers to a group of organisms that can interbreed and produce fertile offspring?

The highest reproductive capacity of an organism under ideal conditions is called:

What limits population growth when resources become scarce?

Which of the following is an example of a biotic factor?

Ecological succession that occurs after a volcanic eruption is called:

An ecosystem with high biodiversity is generally:

Which of the following is a pioneer species?

Which factor increases population size?

Secondary succession begins in an area where:

Which ecosystem has the greatest biodiversity?

What is the final, stable stage of succession?

Which factor does NOT affect carrying capacity?

What happens when a population exceeds its carrying capacity?

Which of the following increases biodiversity?

What is a population?

Plants and animals that naturally live in an area are called:

Which is an example of secondary succession?

Biodiversity hotspots are areas with:

A species that is at risk of extinction is called:

Biotic potential is affected by:

An ecological community and its physical environment is called an:

Which of the following reduces biodiversity?

A species that is not native and harms the ecosystem is called:

Carrying capacity can be decreased by:

The first species to colonize a disturbed area are called:

Which is NOT a type of biodiversity?

The number of individuals in an area is called:

What happens to biodiversity during primary succession?

A keystone species is important because it:

When resources are abundant, a population grows:

What type of succession happens after a landslide removes vegetation but leaves soil?

Which of the following is an abiotic factor?

A climax community is typically:

The potential for a population to grow without limits is:

Species that play a major role in nutrient recycling are:

Which human activity reduces carrying capacity for wildlife?

The sequence of changes in plant and animal life over time is known as:

Which of the following increases ecosystem stability?

What is an example of a limiting factor?

A group of ecosystems with similar climates is called a:

Which of the following is increased by conservation efforts?

The introduction of invasive species usually leads to:

What factor reduces biotic potential?

A population crash occurs when:

Species richness refers to:

Which of the following is a natural cause of succession?

The ability of an ecosystem to recover after disturbance is called:

What is the largest animal in the ocean?

Which of the following is a mammal?

What part of the ocean do most coral reefs occur?

Which marine animal has eight arms and no bones?

What is the term for animals that live on the ocean floor?

Which ocean zone receives sunlight and supports photosynthesis?

What do sea turtles primarily eat?

Which fish can inflate its body to ward off predators?

What is the largest species of shark?

Which of the following is bioluminescent?

Which is an example of a filter feeder?

Marine plants that form underwater meadows are called:

Which animal is known for its ink defense mechanism?

Coral reefs are mainly made up of:

Which marine mammal is known for its intelligence and communication?

What type of fish lays eggs in the sand or coral?

What is the term for tiny drifting organisms in the ocean?

Which of these animals is a crustacean?

What is the main threat to coral reefs worldwide?

Which marine animal can regenerate lost arms?

What is the fastest fish in the ocean?

Which whale species is known for its long baleen plates used for filtering food?

Which marine animal carries its eggs in a pouch?

What is the primary diet of most baleen whales?

Which is NOT a type of coral?

What is the largest cephalopod?

Which ocean zone is pitch dark and extremely deep?

Which marine mammal is commonly called a “sea cow”?

Which of the following is a predator of the ocean?

Which of the following is a planktonic animal?

What is the main function of gills in fish?

Which fish is known for its ability to mimic other species?

Which marine reptile is critically endangered?

Which of these animals is an echinoderm?

Which marine animal uses echolocation to navigate?

What is the primary role of phytoplankton?

Which fish is known as the “clown of the sea”?

What type of symmetry do starfish exhibit?

Which shark is filter-feeding instead of hunting?

Which marine animal has a hard external shell and jointed legs?

Which of these is a venomous marine animal?

What type of fish can live both in fresh and saltwater?

Which marine animal builds homes out of sand and shells?

Which of the following is considered a keystone species in coral reefs?

Which ocean has the greatest number of species?

Which marine mammal is capable of deep dives exceeding 2,000 meters?

What is the primary threat to whales?

Which type of coral forms branching structures resembling antlers?

Which of these is the fastest marine mammal?

Which marine ecosystem is known as the “rainforest of the sea”?