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WorksheetsPhotosynthesis, food chains and cycles
Total questions: 20
Worksheet time: 22mins
Name
Class
Date
1.
When animals break down glucose to create energy, they release water and carbon dioxide. How can carbon dioxide be reused within the food web?
a)
It can be used by animals as a source of oxygen.
b)
It can be used by both plants and animals to produce energy.
c)
It can be used by plants during photosynthesis to create glucose.
2.
Which group in a food web is most likely to change atmospheric nitrogen into forms that are usable?
a)
consumers
b)
decomposers
c)
producers
d)
scavengers
3.
Which shows the correct flow of energy through this simple food chain?
a)
fox → grass → rabbit
b)
grass → fox → rabbit
c)
grass → rabbit → fox
d)
rabbit → grass → fox
4.
Which best explains the role of bacteria in an ecosystem?
a)
They break down organic matter into necessary nutrient components.
b)
They release energy from the decomposition of atmospheric gases.
c)
They convert carbon dioxide and water into simple carbohydrates.
d)
They absorb energy from the synthesis of inorganic compounds.
5.
Which molecule is necessary in order for respiration to occur in plants and animals?
a)
nitrogen
b)
oxygen
c)
sulfur
d)
water
6.
Which best describes the role plants serve in the oxygen cycle?
a)
They absorb oxygen during photosynthesis.
b)
They absorb oxygen during decomposition reactions.
c)
They release oxygen as a waste product of photosynthesis.
d)
They release oxygen as a waste product in cellular respiration.
7.
The diagram shows an example of what kind of organism
a)
Autotroph
b)
Heterotroph
c)
Decomposer
d)
Herbivore
8.
The animals in this image are examples of _________________________ .
a)
Autotrophs
b)
Herbivores
c)
Producers
d)
Heterotrophs
9.
This giraffe is an example of a _______________________________.
a)
Carnivore
b)
Omnivore
c)
Autotroph
d)
Herbivore
10.
As a predator this lion is also an example of a ______________.
a)
Producer
b)
Autotroph
c)
Carnivore
d)
Herbivore
11.
These mushroom are heterotrophs and must therefore get nutrients from other organic matter. Mushroom aslo act as ____________________ in many food webs.
a)
Herbivore
b)
Decomposer
c)
Carnivore
d)
Omnivore
12.
In this image, the grass is the ______________.
a)
Primary Consumer
b)
Secondary Consumer
c)
Heterotroph
d)
Producer
13.
The primary consumer in this food chain is the ____________.
a)
Frog
b)
Eagle
c)
Grasshopper
d)
Python
14.
Which organism is NOT a heterotroph?
a)
Grass
b)
Python
c)
Frog
d)
Eagle
15.
On average how much energy is passed to a higher level in the food web?
a)
90%
b)
25%
c)
10%
d)
50%
16.
The smallest part of the ecosystem is always the ____________.
a)
Primary Producers
b)
Secondary Consumers
c)
Primary Consumers
d)
Tertiary Consumers
17.
The diagram below is an example of _______________
a)
Food Web
b)
Food Chain
c)
Food Pyramid
d)
Food Buffet
18.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
19.
What molecule absorbs sunlight for photosynthesis?
a)
chloroplast
b)
thylakoid
c)
grana
d)
chlorophyll
20.
What is the name of the simple sugar that is produced in photosynthesis?
a)
Sucrose
b)
Dextrose
c)
Glucose
d)
Lactose
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