Nature and Changing Ecosystems

Match

Match the word with its meaning

• Succession

• Ecological

• Climax

• Population

• Primary

Slow change

environmental

Stable

Members of same species

First or initial

• Slow change

• environmental

• Stable

• Members of same species

• First or initial

Poll

Which prediction matches your thinking

• A

• B

• C

• D

​Page 118

​Page 118

Multiple Choice

Both living and nonliving things in ecosystems can change over time.

• True

• False

​Page 119

Multiple Choice

Ecological succession can be noticed in day-to-day life and happens quickly.

• True

• False

Multiple Choice

In ecological succession, a new community _______ the old community.

• destroys

• replaces

​Primary Succession

​New area
No soil

​Lichens from wind settle on rock to make soil.

​Mosses and ferns add to soil when they die.

​Deep soil
Climax community

Multiple Select

How has this system changed initially? (select 2)

• During volcanic eruption, molten lava flows.

• Lichen break down the rock to build soil

• Lava cools and hardens into bare rock.

• A climax community changed.

Multiple Choice

A landside exposes a large rocky outcrop of a mountain.

What kind of succession would occur here?

• Climax community

• Primary succession

• Secondary succession

• Ecological Succession

​Secondary Succession

Multiple Choice

Lichens are present in the second step of secondary succession.

• True

• False

Categorize

Options (9)

New land

Disturbing an ecosystem

Destroying an ecosystem

Starts withouth soil

Starts with soil

Organize these options into the right categories

Primary Succession

Secondary Succession

Plenary - Alef

Learning Objective

Describe how aquatic ecosystems change.

​Vocabulary

• Aquatic: related to water.

• Sediment: broken rock.

• Eutrophication: a body of water becoming nutrient rich.

• Weathering: breaking down rocks to become sediment

• Runoff: moving water from land to water body

• Nutrient: a substance promoting growth and provides energy.

Match

Match the following

• Aquatic

• Sediment

• Nutirent

• Runoff

• Eutrophication

water

broken rock

provide growth, energy

moving water

nutrient-rich water

• water

• broken rock

• provide growth, energy

• moving water

• nutrient-rich water

Multiple Select

What changes might affect an aquatic ecosystem?

• Change of rainfall

• Change of temperature

• A falling tree that blocks a stream

• Sediment build up

​Page 122

​Explore how sediments affect aquatic life

Multiple Select

Sediments are MOSTLY transported by: (select 2)

• water

• wind

• gravity

• runoff

• Mist = ________

• Stream = _________

• Holes = __________

• Mist = rain.

• Stream = storm.

• Holes = flood

​Water bodies become filled with sediment that can clog waterways and cause flooding

​Animals living in water may be covered with sediment and suffocate, and lose their habitat.
Plants living in water will not get enough sunlight.

Multiple Choice

Sediments that are suspended in water can block sunlight and affect aquatic plants negatively

• True

• False

Multiple Choice

Nutrients are a good thing.

• True

• False

Drag and Drop

Based on the video, when there are lots of nutrients in a lake, ​

Placeholder

takes up all of the oxygen, causing the death of ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

algae

fish

fertilizers

nitrogen

Multiple Choice

Eutrophication is caused by _________

• nature

• human activity

• both

Plenary

Search for an example of eutrophication in the UAE and write it in your science notebook

​Lesson Objective

Explore how changing ecosystems affect populations.
Identify how human activity cause disruptions in ecosystems.

​Recall - What are populations and ecosystems?

​Vocabulary

1. Dynamic Equilibrium: the balance between different parts of the ecosystem.

2. Adapt: get used to a new situation

3. Nonnative species: organisms that live outside their natural habitat.

Multiple Choice

Do populations change when ecosystems change?

• Yes

• No

Multiple Choice

Changing ecosystems does not affect populations.

• True

• False

​Natural Disruptions include:

Multiple Choice

Organisms cannot adapt ________ to sudden changes.

• easily

• difficultly

Multiple Choice

Slow changes like mountain formation, can ________ the ecosystem.

• benefit

• harm

Multiple Choice

Some disturbances control the size of population or allow new growth for plant life.

• True

• False

Multiple Choice

Human activity can have a big impact on ecosystems.

• True

• False

Multiple Choice

Humans do not create disruptions in the environment.

• True

• False

​How human activity disrupts ecosystem?

Categorize

Options (8)

Taking resources from nature

Drainage from houses

Living outside their habitat

Deforestation

Drilling for oil

Factories give off harmful gases

Competition

Overcrowding

Organize these options into the right categories

Resource extraction

Pollution

Nonnative species

Categorize

Options (4)

Wildfire

Deforestation to grow crops

Fish dies from pollution

Flood drowns animals in an area

Organize these options into the right categories

Natural disruption

Human disruption