Homeostasis Review

Homeostasis Part 1 Review!

Ecosystems, food webs, symbiosis, predation, competition, and laws of conservation

Ecosystems

Ecosystems include all the interacting biotic and abiotic factors in a region. The scientists that study ecosystems are called ecologists.

The parts of an ecosystem:

• organism: one member of a species

• population: all the members of that species

• community: all the different interacting populations in that region

• ecosystems: the living things (community) and nonliving things in a region

Multiple Choice

biotic means..

• living or part of a living thing

• non-living

Multiple Choice

abiotic means...

• living or part of a living thing

• non-living

Multiple Select

Check all the items that are biotic factors

• flamingo

• grass

• mineral

• stick

Multiple Select

check all the items that are abiotic factors

• temperature

• minerals

• air

• precipitation (rain)

Multiple Choice

An ecosystem includes...

• just biotic factors

• just abiotic factors

• abiotic and biotic factors

Multiple Choice

Which organism in this food web gets its energy DIRECTLY from a producer?

• fox

• frog

• hawk

• rabbit

Multiple Choice

Which of the following describes BOTH the rabbit and the mouse in this diagram?

• Both are primary consumers

• Both are consumed by the fox

• Both are producers

• Both are decomposers

Multiple Choice

What type of organism always starts the food chain?

• primary consumers

• the producers

• the secondary consumer

• decomposers

Multiple Choice

What type of organism helps recycles biotic factors into abiotic factors like nutrients in the soil.

• producers

• primary consumers

• secondary consumers

• decomposers

Multiple Select

What does an arrow in a food chain show? (check ALL that apply)

• The direction the energy flows in

• arrows point in the direction that matter and energy is transferred through living things

• arrows point to the organism that is eaten

• arrows point to the organism that is eating

Multiple Choice

Which organisms would MOST LIKELY be connected by an arrow on a food chain, according to their trophic levels

• marsh grass and meadow grass

• marsh grass and hawk

• meadow grass and snail

• meadow grass and frog

Community Interactions

• Competition

• Predation

• Symbiosis: mutualism, commensalism, and parasitism

Multiple Choice

Describe mutualism.

• One organism hunts and eats a different organism.

• Two organisms compete for the same resource.

• One organism benefits and the other is harmed.

• Both organisms benefit from their interaction.

Multiple Choice

Which of the following is the BEST classification of the relationship between humans and mosquitoes

• mutualism

• commensalism

• parasitism

• competition

Multiple Choice

Woodpeckers and squirrels both nest in trees. What kind of relationship do they have?

• mutualism

• commensalism

• parasitism

• competition

Multiple Choice

A remora gets a ride on a shark. The shark is unaffected. What kind of relationship is this?

• mutualism

• commensalism

• predation

• competition

Multiple Choice

Commensalism, mutualism, AND parasitism are all examples of:

• predation

• competition

• symbiosis

Multiple Choice

A bear eats salmon. This is an example of:

• mutualism

• predation

• symbiosis

• competition

The law of conservation of energy

Energy is neither created nor destroyed, but can transform and transfer (move)

This is a scientific law because we can observe this (in a closed system)

The law of conservation of mass

According to this law, the total amount of mass in a closed system will always be the same. Matter is neither created nor destroyed, but it can under physical and chemical change.

Multiple Select

Check all that apply. A scientific law...

• is supported by observation and evidence

• describes something we can observe under set conditions

• is voted on

• tells us right from wrong

Multiple Choice

True or False: Carbon atoms found in current living things are the same carbon atoms that have always been a part of living things, they are just recycled.

• True

• False

Multiple Choice

A student places a seed in a wet paper towel in a sealed jar. They measure the mass. After two weeks, the seed sprouts. What do you predict happened to the mass of the jar with the seed?

• it increased

• it decreased

• it stayed the same