Colegio Cordillera
Natural Science
SCIENCE TEST 1
Name: ____________________________________________ Class: 6th _____ Date: ___________2023
I . Food webs and food chains
Answer the questions
1)
What is the difference between a Food Chain and A Web Chain? What do each of them
represent?
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Look at the following diagram and answer:
2.- What trophic levels (producer, consumer, decomposer) do letters A and C represent?
A______________________________________________________________________
C______________________________________________________________________
3.- Draw a Food Chain using the diagram above as reference
The following image shows a hypothetical food web. Answer the following questions
according to this diagram.
4. Complete with increase or decrease.
a) If the quantity of organisms 1 decrease, the organisms in 3, 4 and 5 would ______________.
b) If organisms 4 decrease in quantity, the organisms 5 and 6 would ____________________.
c) If organisms 3 and 5 increase in quantity, the organisms 6 would _____________________.
5. Which organisms represent each trophic level?
Trophic level
Primary consumer
Secondary consumer
Tertiary consumer
Producer
Example (organism)
6. Look at the picture above. Considering the organisms in the other trophic
levels, what would happen if:
I.
The quantity of krill increased?
a) Phytoplankton would disappear
b) Seals would disappear
II.
The quantity of krill decreased?
a) Phytoplankton would disappear
b) Seals would disappear
II. Photosynthesis
1. Plants require diverse elements to carry out photosynthesis; these elements
are obtained through different structures of the plant. Write down the
element(s) that these structures capture.
2. Look at the diagram that summarizes the process of photosynthesis and
write down the missing elements where they correspond.
Requirements
Carbon dioxide + ___________ + Light
Products

___________ + Oxygen
3. Look at the picture and fill in the blanks with the words at the bottom of the
page.
Photosynthesis is a process where plants use ___________________ from the sun
to transform ________________________ from the air and
___________________ from the soil into _________________ to feed the plant
and ___________________ is released into the air.
Water – glucose – carbon dioxide – light - oxygen