UNIT 7.
LESSON 1:
If you were to involve grade 3 pupils in protecting our environment, propose plan of what they can do
and how can you get their cooperation.
1. If I were involve in grade 3 pupils in protecting our environment, the plan that I’m able to
propose is the recycling activity. Recycling activity can inspire students to care about the
environment. In this activity the pupils can actively participate and cooperate. They will they
bring some of recyclable materials such as news paper, plastic bottles and some materials that
can be recycled. By recycling those materials, they will show the love and care to our
environment. I will tell them the importance of recycling materials.
SEL-CHECK
Write check mark if the statement is good for the organism, an X mark if not.
1. Soil nutrients for earthworms.
X 2. Dry place for golden soil.
X 3. Foul smelling air for human baby.
4. Dark water in the river for shrimp.
5. Green grass in an open field for goat.
UNIT 7. LESSON 2:
Research on various example of beneficial and harmful interaction of organism in different types of
ecosystem. Design a poster that explains a kind of interaction.
Beneficial interaction. Organism often provide resources or services to each other. The interaction in
mutually beneficial. For example, ants living in a tree which may protect the tree from an organism that
would like to make the tree its next meal and at the same time, the tree provides a safety home for the
ants.
Harmful interaction. Parasitism occurs when one organism lives on or on another causing the first
organism harm. Parasite is an organism that lives in or another organism and uses its host for its own
nutritional needs. While the parasite consumes the parts of its host. It usually does not kill the host.
Sometimes, parasite that can live inside the host can be categorized as pathogens. It means they cause
definite harm to the host such as disease. For example, tapeworm and animals such as cow and human.
Tapeworms are flatworms that attach to the inside of an animal’s intestine to get food for survival. They
eat the host partially digested food. This causes the host nutrients supply to be deprived of vital
nutrients for survival. Eventually the host will die.
SELF-CHECK
What might happen to an ecosystem in which the number of predators was greatly reduced?
If found that the loss of major predators in forest ecosystem has allowed game animal populations to
greatly increase. Crippling the growth of young trees and reducing biodiversity. This also contributes to
deforestation and results in less cartoon sequestration. A potential concern with climate change.
UNIT 7. LESSON 3:
The organisms that live in estuaries or intertidal zone that your fear is in danger of becoming
extinct are fish, shellfish and migratory birds are just a few of the animals that can live in an
estuary. The several different habitats. There are oyster reefs where oyster, mud crabs and
small fish may be found. To save these organisms restrict fishing activities, pay attention to
regulations that limit quantity and size of fish and shellfish that can be taken to prevent
excessive harvesting.
SELF-CHECK
Answer True if the statement is correct and False if it is not correct.
1. A sea grass bed is habitat or algae. - TRUE
2. Mangrove swamps are home for much crabs. - FALSE
3. Mangrove trees provide barriers for erosion of coastal areas. - TRUE
4. Barnacles attach to the rocks as a protection from tides. - TRUE
5. A tide pool in an intertidal zone is home of claims, hermit crabs and small shrimps. - TRUE
UNIT 7. LESSON 4:
Compare the variety of ecosystem in the ocean and land. Suggest reasons why there is greater variety
on land than in the ocean.
1. Most of the extraordinary diversity on land is due to insects, flowering plants, and fungi, groups
with notably few species in the sea. However, one would be mistaken to argue that terrestrial
diversity exceeds that in the sea because, there are so few following plants, insects, and fungi in
marine environment.
How has coral reefs and tropical rainforests been affected by the development of civilization?
2. The commonly observed high diversity of trees in tropical rain forests and corals on tropical reefs is a
non-equilibrium state which, if not disturbed further, will progress toward a low-diversity equilibrium
community. This may not happen if gradual changes in climate favor different species. If equilibrium is
reached, a lesser degree of diversity may be sustained by niche diversification or by a compensatory
mortality that favor’s inferior competitors. However, tropical forests and reefs are subject to severe
disturbances often enough that equilibrium may never be attained.
SELF-CHECK
1. Coral reefs protect coastlines from the damaging effects of wave action and tropical storms.
2. Provide habitats and shelter for many marine organisms.
3. Forest provide oxygen for our lungs.
4. Forest purify and provide clean water.
5. It helps with nutrient recycling.
1. Practice safe and responsible diving and snorkeling. Avoid touching reefs or anchoring your boat
on the reefs.
2. Take a reef friendly approach to sun protection. Some ingredients in sunscreen can be harmful
to or even kill corals.
3. Regulated and planned cutting of trees.
4. Control over forest fire.
5. Reduce storm water runoff.
