Living Things and the Environment

An ​ (a)   obtains food, water, shelter, and other things it needs to live, grow, and reproduce from its environment.

• organism
• community
• habitat
• ecosystem

The living parts of a habitat are called ​ (a)  

• biotic factors
• abiotic
• photosynthesis
• oxygen

The process in which plants and algae make food using water, sunlight, and carbon dioxide is called ​ (a)  

• photosynthesis
• homeostasis
• biotic factors
• commensalism

All the different populations that live together in an area make up a(n) ​ (a)  

• community
• population
• ecosystem
• species

List the levels of organization in an ecosystem from the smallest unit of organization to the largest.​ (a)  

• Organism, population, community, ecosystem
• population, organism, community, ecosystem
• organism, population, ecosystem, community
• organism, community, population, ecosystem

Match the type of study with its example

• direct observation

• Counting all the crabs that live in a tide pool.

• indirect observation

• Counting the number of nesting sites in an area.

• sampling

• Counting the number of red maples in a small area to estimate the number in the entire forest.

• mark-and-recapture study

• Counting hawks with and without bands on their legs.

What is the main way that individuals leave a population? ​ (a)  

• dying
• carrying capacity
• birth
• population

Match the term with its definition

Leaving a population - (a)  

Moving into a population - (b)  

• Leaving a population

• Moving into a population

• emigration
• immigration

An environmental factor that causes a population to decrease is called a(n) ​ (a)  

• limiting factor
• abiotic factor
• biotic factor
• carrying capacity

True or false: An area contains only one habitat. ​ (a)  

• false
• true
• maybe