Energy Flow Through Ecosystems

Multiple Select

What are the names of the nitrogenous bases?

• adenine

• cytosine

• thymine

• guanine

Multiple Choice

Adenine always pairs with...

• thymine

• cytosine

• guanine

• adenine

Multiple Choice

Cytosine always pairs with...

• thymine

• cytosine

• guanine

• adenine

Multiple Choice

What is the shape of DNA?

• double helix

• single helix

• squiggle

• twisty step looking thing

Energy Flow Through Ecosystems

• Producer - organisms that make their own food.

  • They are also called autotrophs.

• Consumer - organisms that obtains energy from eating other organisms.

  • They are also called heterotrophs.

Producers and Consumers

Multiple Choice

Producers are generally found at the beginning of a

food chain. Which statement best explains why this

is true?

• Producers are usually smaller in size than

  consumers.

• Producers do not rely on other organisms for

  food.

• There are always more consumers than

  producers in food chains.

• Consumers are always more complex

  organisms than producers.

Multiple Choice

In the food chain below, which is the producer?

grass --> mouse --> snake --> hawk

• grass

• mouse

• snake

• hawk

Photosynthesis - process of plants using solar energy to produce their food.

Photosynthesis

Multiple Choice

Which process do plants use to turn sunlight into food energy?

• photosynthesis

• cellular respiration

• transpiration

• evaporation

Cellular Respiration - cells release stored energy to make ATP.

Cellular Respiration - cells break down glucose to make energy.

Multiple Choice

Cellular respiration is...

• the process by which cells break down glucose into energy.

• the process by which cells break light down into energy.

• the process by which cells communicate with other cells.

• Food chain - models energy flow through an ecosystem.

• Shows feeding relationships.

• Producers - plants and algae that perform photosynthesis.

• Primary consumers - eats producers; also called herbivores.

Food Chains

• Secondary Consumers - eats primary consumers; also known as carnivores.

• Tertiary Consumers - eats secondary consumers.

• Decomposers - breaks down the remains of plants and animals

Food Chains

Match

Match the following:

• Producer/Autotroph

• Secondary Consumer

• Tertiary Consumer

• Apex Predator

• Herbivore

Plant

Bird

Snake

Owl

Grasshopper

• Plant

• Bird

• Snake

• Owl

• Grasshopper

Multiple Choice

Which of the following is a primary consumer in a food chain?

• predators

• herbivores

• carnivores

• omnivores

Ecological Pyramid - models that show the flow of energy through trophic levels and feeding relationships in an ecosystem.

Ecological Pyramid

• Energy Pyramid - shows the total amount of energy stored in organisms.

• Not all energy stored in producers is passed on to the next trophic level.

• Only 10% of the matter and energy and energy in the organisms of each trophic level transfers to the next level.

Energy Pyramid

Multiple Choice

How much energy is passed from one trophic level to the next?

• .1%

• 1%

• 10%

• 100%