Environmental Science class Chapter 1 Review Environmental Science class

Leaving a population is called ____________. emigration

An environment that provides food, water and shelter to living organisms is called ________________. habitat

What is the formula for density? Population density = number of individuals unit area

What are 3 major interaction between organisms? Competition Predation Symbiosis

A _____________ is a group of organisms that look alike and can mate with each other to produce offspring. species

_____________ is a method in which a scientists count signs of rather than the organisms themselves. Indirect observation

A succession after a fire or hurricane is called ____________ A succession after a fire or hurricane is called ____________. Secondary succession

________________ is a relationship in which one species benefit and the other species is neither helped or harmed. Commensalism

____________ is favorable characteristics that makes an animal survive better in an environment and reproduce. Natural selection

All the different populations living together in an area make up ____________. community

An relationship between tick and cow represents ___________________. Parasitism

There are 5 abiotic factors: _____________, ____________, _____________, ______________ and _____________. Water, sunlight, oxygen, temperature, soil

__________________ is an environmental factor that causes a population to stop growing. Limiting factor

In general, which of the following is a true statement about population size? If birth rate < death rate, population size increases. If death rate < birth rate, population size decreases. If birth rate > death rate, population size increases. If death rate > birth rate, population size increases.

Which one of the following is a biotic factor? Willow tree Soil Water Air

A prairie dog, a hawk, a deer all are members of the same: Niche Community Species Population

A process in where plants make their own food using Sun, water and CO2 is called: Population Habitat Photosynthesis Chemosynthesis

All of the following are examples of limiting factors for populations except: Space Food Time Weather

Which one of the following is an abiotic factor? Worm Rose Water Elephant

Photosynthesis needs 3 materials. What 3 materials are needed? Water, CO2, Sun Water, Sun, O2 Sun, rain, O2 CO2, O2, water, light

What is a species? An individual single living thing All the different populations that live together in an area A group is organisms that are similar and can mate with each other All the members of one species in a specific area

Which one of the following statements reflect predator adaptations? Imitating other dangerous animals Bacteria and algae living together as lichens Jellyfish poisoning water animals to paralyze them Skunk releasing bad smell

A way of counting all the members is called: Direct observation Indirect observation Sampling Mark-and-recapture studies

Which equality is expressed correctly? 23 > -11 0.5 < 0.02 .75 < 1 15- 4 > 15 - 3

Moving into a population is: Immigration Emigration Population density Carrying capacity

Carrying capacity is: The smallest area that can support animals The largest population that an area can support The factor that causes a population to stop growing The birth rate in which animals are born in a specific time frame

There are 39 black labs (dogs) in an area measuring 10m2 There are 39 black labs (dogs) in an area measuring 10m2. What is its population density? 39 black labs/10m2 39 black labs/m2 30 black labs/cm2 3.9 black labs/m2

In sampling method: All members are counted An estimate of population is made Signs of organisms are counted than the organisms themselves A scientists counts animals, marks them, returns and recaptures them again later

The birth rate is: Is the number of immigrated members of populations in a certain amount of time Is the number of births in a populations in a certain amount of time Is the number of deaths in a populations in a certain amount of time Is the number of emigrated members of populations in a certain amount of time

A method in where a scientist use an estimate is called: Direct observation Indirect observation Sampling Mark-and-recapture studies

Why is the primary succession slow? Because it takes more time to break up bare soil by moss, lichens, fungi and algae.

Calculating: Suppose a population of 100 elephant has produced 700 young. If 150 elephants have died, how many mice are in the population now? 100 + 700 = 800 elephants (parents and children) 800 – 150 died = 650 elephants are now in the population

A vampire bat drinks the blood of horses A vampire bat drinks the blood of horses. What kind of interaction is that?. Parasitism- because the bat benefits (drinks blood) and the horses are harmed (hurt).

What is photosynthesis? Why is it so important to living things? Photosynthesis is a process in which plants make their own food using Sun, water and CO2. It’s important because it provides oxygen to animals and people.

Oxpeckers (birds) eat ticks that live on hippo’s skin Oxpeckers (birds) eat ticks that live on hippo’s skin. What kind of interaction is that? Mutualism- oxpeckers get food from ticks on hippo and hippo feels better that there are no ticks on his skin.

Give examples of biotic factors. -dog -cat -horse -worm -bug

What are 4 ways to determine population size? -direct observation -indirect observation -sampling -mark-and-recapture studies

What happens to the population if death rate > birth rate? The population size will decrease (go down).

Which population is higher in 1965? Wolves

Based on the graph, in which year the number of wolves declined sharply? 1980

Explain why water and sunlight are two abiotic factors that are important to most organisms. Water is important for basic life processes like breathing, eating etc. Also, it’s important for photosynthesis. Sunlight is also needed for photosynthesis. Plants will not grow in dark areas.

What are different reasons why a population size decreased? Death Emigration Disease Predation Limited food Overcrowding