Abiotic Factors & Food Webs

Please wait to turn in your homework! Be in your seat when the bell rings!

Question of the Day

Question: What’s an example of an abiotic factor that has affected you today and how has it affected you?

Answer: … … …Food pictures: pile next to trays3’s Turn in: - A.Q. 1a, 2a, 3 on p. 72- 24-hour food list (Inv. 1.2)

• During the video, make a list of all of the interactions between biotic and abiotic factors.

And Then The Rains Came

• Photosynthesis: how light energy is converted to chemical energy

Biosphere Cycles#22.

• Cellular respiration: how energy is released from chemical compounds

Biosphere Cycles#45

Inv. 3.3: Beans & pH

• pH scale- measure of H+ ions (acidity)

Inv. 3.3: Beans & pH

Stomach

Acid: pH 1.1

Inv. 3.3: Beans & pH

Acid Rain

• 3. Question: The word autotroph comes from the Greek words autos, meaning “self,” and trophe, meaning “food or nourishment.” Knowing this, what do you think the Greek word, heteros, as in heterotroph, means?

• 3. The Greek word heteros means “other,” or “different.”

A.Q. 1a, 2ab, 3 on p. 72

Inv. 1.2: Food Web

• Features you and your food log

• Minimum 25% of food cut-outs (collage); rest is colored drawings

• No formal lab write-up required

• 1a. Question: What are the two primary sources of energy that power living systems?

• 1a. The two primary sources of energy that power living systems are solar energy and chemical energy

A.Q. 1a, 2ab, 3 on p. 72

• 2a. Question: Explain how consumers obtain energy.

• 2a. Consumers obtain energy by ingesting other organisms or the remains of other organisms.

A.Q. 1a, 2ab, 3 on p. 72

• 2b. Question: How are detritivores different from decomposers? Provide and example of each.

• 2b. Detritivores are different from decomposers because detritivores feed by eating detritus particles, while decomposers feed by chemically breaking down organic matter on which they live. An example of a detritivore is an earthworm and an example of a decomposer is a fungus.

A.Q. 1a, 2ab, 3 on p. 72

• 3. Question: The word autotroph comes from the Greek words autos, meaning “self,” and trophe, meaning “food or nourishment.” Knowing this, what do you think the Greek word, heteros, as in heterotroph, means?

• 3. The Greek word heteros means “other,” or “different.”

A.Q. 1a, 2ab, 3 on p. 72

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