Do Now - 6.12a 7.12a 8.12bc - STAAR Review

What is the difference between the biotic and abiotic factors?

• Biotic factors are living things and abiotic factors are nonliving things.

• Biotic factors are nonliving things and abiotic factors are living things.

What is the main difference between primary and secondary ecological succession?

• Primary begins WITHOUT soil; Secondary begins WITH soil

• Primary is the first state and secondary is the second stage

• Primary builds plant community; secondary builds animal community

• Primary begins WITH soil; Secondary begins WITHOUT soil

Why is only about 10% of the energy passed up trophic levels?

• Because 90% of the energy is used in life process and transformed into heat.

• It is not; 100% of the energy is passed up the trophic levels.

• Because water absorbs 90% of the energy.

Tags

NGSS.MS-LS2-3

In trophic levels, which direction does the energy flow?

• Producer, Primary Consumer, Secondary Consumer, and Tertiary Consumer

• Producer, Secondary Consumer, Primary Consumer, and Tertiary Consumer

• Tertiary Consumer, Secondary Consumer, Primary Consumer, and Producer

• Primary Consumer, Tertiary Consumer, Producer, and Secondary Consumer.

Tags

NGSS.MS-LS2-3

Which organisms are primary consumers?

• Deer Mouse & Black-tailed Jackrabbit

• Ragweed & Grama Grass

• The Sun

• Coyote & Red-tailed Hawk

Tags

NGSS.MS-LS2-2

The ecological niches of three bird species are shown in the diagram to the right. What is the advantage of each bird species having a different niche?

• Predators are less likely to feed on birds in a variety of locations.

• More abiotic resources are available for each bird.

• As more birds feed higher in the tree, available energy increases.

• There is less competition for food.

Tags

NGSS.MS-LS2-1

Students in a science class visited four local ecosystems. The students observed the species present in each ecosystem and recorded their observations in the table.

Based on these observations, which ecosystem is likely to be the LEAST sustainable?

• A. Ecosystem 1, because it has the fewest species.

• B. Ecosystem 2, because it includes both aquatic and terrestrial species.

• C. Ecosystem 3, because it has few predators.

• D. Ecosystem 4, because it supports many animals.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Match these terms

• one organism harms the other

• Parasitsm 
• one benefits; the other doesn't care

• Commensalism 
• both organisms benefit

• Mutualism 

Tags

NGSS.MS-LS2-2