ES: Ch 5.3 Ecological Communities

Which of the following best describes an ecosystem?

• all the living organisms in an area and their physical surroundings
• a region with a distinct climate
• all the living organisms of the same species throughout the world
• all the living organisms in an area

What is the ultimate source of energy for all ecosystems?

• the Sun
• plants
• secondary consumers
• primary consumers

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of the following interactions is an example of symbiosis?

• an insect acts as a pollinator for a plant species
• a population of hummingbirds migrates during the summer
• a tropical bird performs a courtship dance for a mate
• a mother bear feeds and protects her cubs

The energy pyramid below shows a possible amount of energy, in kilocalories, available in the organisms at each trophic level in an ecosystem.  According to the law of conservation of energy, energy can neither be created nor destroyed.  If this is true, why is there less energy in the top of the energy pyramid than there is in the bottom of the energy pyramid?

• Energy is lost between each trophic level as heat.
• The law of conservation of energy does not apply to ecosystems.
• Organisms in the top of the energy pyramid use up energy the fastest.
• The extra energy in the bottom is slower to reach the top.

Tags

NGSS.MS-LS2-3

Which of these food chains would be the most efficient?

• Producer > Primary consumer

• Producer > Primary consumer > Secondary consumer > Tertiary consumer

• Producer > Primary consumer > Secondary consumer

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

Which of these is NOT a way that energy is wasted by animals in a food chain?

• Photosynthesis

• Respiration

• Movement

• Keeping warm

A difference between photosynthesis and chemosynthesis

• Photosynthesis doesn't use light and chemosynthesis does

• Photosynthesis makes sugar and chemosynthesis doesn't

• Photosynthesis uses light and chemosynthesis doesn't

• Photosynthesis doesn't make sugar and chemosynthesis does

Tags

NGSS.MS-LS1-6

What is a similarity in chemosynthesis and photosynthesis

• they both produce carbon dioxide

• they both use light

• the both are used by plants

• they both produce energy and sugar

Tags

NGSS.MS-LS1-6

The Greek work "trophikos" means ________________.

• To feed

• To bluff

• To triumph

• To be or not to be

Answer explanation

The important root word to remember is "Troph". Anytime you see this root word, you know that it's related to food. So a trophic level is an organisms level in the food chain.

Organisms that make their own food are called _____________

• Consumers

• Herbivores

• Autotrophs

• Heterotrophs

Answer explanation

"Auto" = self

"Troph" = to feed

Autotrophs are self-feeders.