ECOSYSTEM

​Review of the past lesson

Multiple Choice

Sponges

• Are plants

• Are plankton

• Are found in cold waters

• Are filter feeders

Multiple Choice

Which of these animals is not a crustacean?

• lobster

• crayfish

• crabs

• clam

Multiple Choice

A squid is a member of what family that have soft bodies.

• Sponges

• Crustaceans

• Mollusks

• Coelenterates

Multiple Choice

Which group are all the same classification?

• lobster, coral, hermit crab

• Shrimp, jellyfish , bluebottle

• mussel, octopus, scallop

• Sea cucumbers, starfish, pipi

Multiple Choice

A butterfly is a type of vertebrate.

• True

• False

Multiple Choice

Dragonflies, stink bugs, and lady bugs are __________.

• arachnids
• mollusks
• crustaceans
• insects

Multiple Choice

What types of organisms can be found in a peaceful-looking environment?

• Moss

• Tall trees

• Small animals

• All of the above

Open Ended

What are the unique characteristics of ecosystems that enable life forms to thrive?

​PRE-ASSESSMENT

Multiple Choice

Which of the following best describes an ecosystem?   

• Composed of living things only 

• Characterized by interactions of living things

• Characterized by interactions within living things and their environment

• Composed of nonliving things only

Multiple Choice

Which of the following does not belong to the group?

• caterpillar

• lion

• tiger

• snake

Multiple Choice

Which of the following is true of autotrophs?   

• They are known as consumers. 

• They are known as decomposers.

• They depend on other organisms.

• They can manufacture their own food.

Multiple Choice

Which of the following best describes a keystone species?  T

• They support big ecosystems.

• They are the top predators in the food chain.

• They are the producers in the ecosystem.

• hey are the carnivores in the ecosystem.

Multiple Choice

Which of the following has the highest amount of biodiversity?

• Temperate forests
• Deserts
• Tropical rainforests
• Grasslands

Multiple Choice

Which of the following best describes recycling?

• Recycling is the process of storing waste in landfills.
• Recycling involves burning waste materials for energy.
• Recycling is the act of throwing away old products.
• Recycling is the process of converting waste materials into new products.

Multiple Choice

Which of the following kinds of wastes do household wastes belong to?

• Hazardous waste
• Industrial waste
• Biodegradable waste
• Municipal solid waste

Multiple Choice

Which of the following best describes eutrophication?

• Eutrophication is the process of water evaporation in lakes.
• Eutrophication refers to the cooling of ocean waters.
• Eutrophication is the depletion of nutrients in soil.
• Eutrophication is the enrichment of water bodies with nutrients, causing algal blooms and oxygen depletion.

Multiple Choice

Which of the following could reduce biodiversity?

• Increased habitat variety
• Sustainable farming practices
• Natural disaster recovery
• Habitat destruction, pollution, climate change, overexploitation, invasive species.

ECOSYSTEMS

Ecosystems such as in tropical rainforests, estuaries, and coral reefs are among the most productive environments.

ECOSYSTEMS

This is due to the presence of high biodiversity in the said environments. Due to the presence of varied organisms, different interactions are present as well.

ECOSYSTEMS

These interactions can be traced in the food chain or in the food web.

​any questions?

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Organisms that depend on other organisms for their nutrition.

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Composed of all the organisms living in a community, together with the nonliving things with which they interact.

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Consumers that eat both plants and animals.

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Consumers that eat mainly meat.

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Law stating that matter cannot be created or destroyed but is recycled in ecosystems.

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The top predator in the Philippine food chain mentioned in the lesson.

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Organisms like caterpillars, cows, and sheep are examples of this type of consumer.

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Consumers that mostly eat plants.

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Consumers that mostly eat plants.

Multiple Choice

A millipede feeds on decaying leaves in the forest. What role does it play in the ecosystem?

• Decomposer
• Predator
• Parasite
• Herbivore

Multiple Choice

Sunlight allows plants to produce their own food through photosynthesis. What are these plants considered?

• Saprophytes
• Heterotrophs
• Decomposers
• Autotrophs

Multiple Choice

All of the living and nonliving things in an area that interact with each other are called a/an ______.

• community
• habitat
• population
• ecosystem

Multiple Choice

Plants can capture sun's energy, which they use for food making or ____________.

• Metamorphosis

• Photosynthesis

• Hibernation

• Estivation

Multiple Choice

What gas is absorbed by the plants?

• Oxygen

• Argon

• Carbon dioxide

• Helium

Reorder

Put this food chain in the correct order

• Grass

• Rabbit

• Snake

• Hawk

1

2

3

4

• 1
• 2
• 3
• 4

Reorder

Put the following organisms in the correct order to create a food chain

• Grass

• Cricket

• Frog

• Snake

• Hawk

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

KEYSTONE SPECIES & ENERGY PYRAMID

Keystone species are known as organisms that are vital to the balance of an ecosystem. An example of these are the bees, which serve as the primary pollinator of a lot of plants.

any questions?

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The first level of the food chain that produces its own food using sunlight.

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Energy that is lost from an ecosystem as heat during transfers between trophic levels.

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A species that plays a vital role in maintaining the balance of an ecosystem.

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The total amount of energy available in one trophic level of an ecosystem.

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The rule that states only about 10% of energy is passed from one trophic level to the next.

Multiple Choice

A large bird of prey that sits at the top of the food chain.

• primary consumer

• secondary consumer

• tertiary consumer

Multiple Choice

Organisms like cows, sheep, and deer that feed on plants.

• primary consumer

• secondary consumer

• tertiary consumer

Multiple Choice

A mammal that eats both berries and insects in a forest ecosystem.

• primary consumer

• secondary consumer

• tertiary consumer

Multiple Choice

The level in the energy pyramid that receives the least amount of energy.

• primary consumer

• secondary consumer

• tertiary consumer

Multiple Choice

A small insect that eats plants and is eaten by a frog in a pond ecosystem.

• primary consumer

• secondary consumer

• tertiary consumer

Multiple Choice

This question is confusing! Look CAREFULLY at the image. What trophic level is the PRIMARY consumer?

• 1st

• 2nd

• 3rd

• 4th

Multiple Choice

In this food chain, what will happen if the frogs become extinct?

• The snakes will increase.
• The grasshoppers will decrease.
• The eagles will remain the same.
• The grasshoppers will increase.

Multiple Choice

All energy on Earth ultimately comes from what source?

• Water

• Consumers

• Sun

• Oxygen

Multiple Choice

An organism that needs to eat other organisms to obtain energy is known as a:

• Autotroph

• Consumer

• Producer

• Mutualist

Multiple Choice

An organism that uses sunlight to create its own food is known as a:

• Producer

• Heterotroph

• Consumer

• Decomposer

Multiple Choice

What does a food chain represent?

• How all living organisms within a ecosystem are connected.

• All of the things that a particular animal eats.

• How plants create their own food.

• A single path of energy transfer within a ecosystem.

Multiple Choice

Corn in a field is an example of

• producer

• consumer

• decomposer

• heterotroph

Multiple Choice

Cows are an example of

• autotroph

• herbivore

• carnivore

• decomposer

Multiple Choice

A lion is an example of

• producer

• decomposer

• carnivore

• autotroph

Multiple Choice

Organism that eats both producers and consumers

• carnivore

• omnivore

• herbivores

• autotroph

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident