Grade 7 Module 2 Dynamic ecosystem revision

Grade 7 Module 2 Dynamic ecosystem revision

by shahir babu

Multiple Choice

All food chains begin with a ____________.

• primary consumer
• secondary consumer
• producers
• scavengers

Multiple Choice

What is the term used to describe all living things in an ecosystem?

• Biotic Factors
• Abiotic Factors
• Environmental Factors
• Population

Multiple Choice

all the snakes in the area 

• organism 
• ecosystem 
• population 

Multiple Choice

Limiting factors are sometimes helpful because they can keep the population from getting too large.

• True
• False

Multiple Choice

Food, water, sunlight, shelter, and space are resources that are  __________.

• limiting factors
• wet
• messy
• found in rocks

Multiple Choice

A snake is eaten by a hawk. The hawk is the _______.

• prey
• parasite
• predator
• all of these

Multiple Choice

An organism that lives in an ecosystem naturally.

• Native species
• Invasive species
• Introduced species
• Non-Native species

Multiple Choice

What happens if a population grows past its carrying capacity?

• The population keeps growing

• The population starts to die off

• The entire species will go extinct

• The carrying capacity just increases

Multiple Choice

Why can ecosystems only support a limited number of organisms?

• limited resources

• human activity

• changing climate

• too much diversity

Multiple Choice

Define mutualism

• One organism benefits, one is unaffected

• Both organisms benefit

• One benefits, one is harmed.

Multiple Choice

Clownfish- home & protection

Sea anemone- Clownfish lures prey into the sea anemone and the sea anemone gets food.

• Parasitism

• Mutualism

• Commensalism

Multiple Choice

Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not.

• mutualism
• commensalism
• competition
• parasitism

Multiple Choice

A tapeworm lives in the intestine of a cat absorbing nutrients through its skin. A tapeworm and a cat have this type of relationship.

• mutualism

• parasitism

• commensalism

• competition

Multiple Choice

What type of symbiosis?  Skunks often live in burrows that have been dug and abandoned by woodchucks.  

• commensalism
• mutualism
• parasitism
• predation

Multiple Choice

When a mosquito bites you, you are the __________ and the mosquito is the  ____________.

• host, hostess
• parasite, host
• host, parasite
• prey, predator

Multiple Choice

Which experiences the least change over time?

• Pioneer Species

• Primary Succession

• Aquatic Succession

• Climax Community

Multiple Choice

Breaking News! A new island has formed off of Hawaii! What must occur for it to become an ecosystem?

• Secondary Succession

• Aquatic succession

• Primary Succession

• Ferns must grow

Multiple Choice

succession that occurs in an area where soil is already present

• ecological succession 
• primary succession 
• secondary succession
• pioneer speciles

Multiple Choice

ends in a climax community

• primary succession 
• secondary succession
• both types of succession

Multiple Choice

Living and non-living things in a place

• Ecosystem

• Habitat

• Disrupt

• Adapt

Multiple Choice

To change an ecosystem

• Ecosystem

• Habitat

• Disrupt

• Adapt

Multiple Choice

If there is a drought with no rain, birds cannot get _____.

• Food

• Water

• Shelter

• Space

Multiple Choice

Any species that occurs outside its native range as

a result of deliberate or accidental introduction by

humans.

• Native species

• Non native species

• Keystone species

• Invasive species

Multiple Choice

Is this good for us?

• yes

• no

Multiple Choice

What is Pollution?

• an unhealthy diet

• global warming

• lands, people and plants

• harmful substance introduced to the environment