4.4 Bioaccumulation

• Bio
• Secondary Education
• Age 13

Lesson 2.5 

Bioaccumulation

15 / 09 / 2022

Choose an emoji to tell us how you feel today.

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• I can define (give the meaning of) ‘bioaccumulation’.
• I can state 2 ways how 'bioaccumulation' impacts or affects the organisms in an ecosystem.

GOALS

Lesson 2.5 

Bioaccumulation

15 / 09 / 2022

Key words

• " Bio " means life or living organisms.

Key words

• " Accumulate " means gather together or get an increasing number or quantity of.

Key words

• " Bioaccumulation " means getting an increasing number of harmful chemicals in the bodies of living organisms.

Key words

• " Biodegradable " means can be decomposed or broken down into tiny pieces by bacteria or other living organisms so that we prevent pollution

Key words

• " Insecticide " means any toxic substance that is used to kill insects.

Key words

• " Decomposers " means organisms that break down dead or decaying organisms.

00:16

What does a decomposer do to dead, decaying organisms?

1. makes it alive
2. breaks it down

Lesson 2.5 

Bioaccumulation

14 / 09 / 2022

DDT

• (dichloro-diphenyl-trichloroethane) was the first of the modern synthetic insecticides in the 1940s. It was initially used to prevent malaria, typhus, and the other insect-borne human diseases

DDT

• a persistent chemical (it stays in the environment for many years). 
• This chemical CANNOT BE broken down by decomposers.

Lesson 2.5 

Bioaccumulation

15 / 09 / 2022

Is the number of DDT in our body MORE than in one of the three fishes we eat? Why?

Question Goal

If we eat 3 fishes with 1 DDT each, then we will have ________ DDT than ONE fish because _________.

Hypothesis

If we eat 3 fishes with 1 DDT each, then we will have ________ DDT than ONE fish because _________.

Lesson 2.5 

Bioaccumulation

15 / 09 / 2022

= DDT

= DDT

?

How many ppm (parts per million) of DDT is in the shark after eating two tuna fish?

1. 16
2. 15
3. 14
4. 12

REFLECTION

15 / 09 / 2022

I THINK I NEED MORE PRACTICE ON:
1 - I can define (give the meaning of) ‘bioaccumulation’.
2 - I can state 2 ways how 'bioaccumulation' impacts or affects the organisms in an ecosystem.

1

2

1 and 2

I am now confident.

HOW WELL DID YOU PARTICIPATE TODAY?
1 - I need to participate more! ⚠️
2 - I have participated and I will do more next time! ☺️
3 - I did an excellent job today! 🏆

13