20172018 1 In the diagram above where is light energy converted to chemical energy Sun Grass Grasshopper Hawk Page 2 GO ON 2 What happens to the solar energy absorbed ID: 687586
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Slide1
Science Grade 7 Unit 6 Test 2017-2018Slide2
1
In the diagram above,
where
is
light energy converted to chemical energy?SunGrassGrasshopperHawk
Page
2
GO ONSlide3
2 What happens to the solar energy absorbed
by
plants during photosynthesis?
It is recycled
by the plant and returned to the atmosphere.It is converted into oxygen and glucose.It is stored as heat within the plant for cellular functions.
J. It is
transformed into chemical energy.Slide4
3 Fruit and
vegetable scraps can
be
put into
compost bins. Water is also needed for composting to be effective. With frequent turning, the compost will turn into soil after about three months.
Refer to the information and diagram
above. What is occurring in the compost bin?
Decaying causes the food to become
cold.
The amount
of matter
is
doubled.
Decomposers break
down the organic matter.All the microbes in the food die.
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4
GO ONSlide5
4 A student researching
a
northern forest
ecosystem
learns the following information about feeding relationships in the ecosystem.Which food web best represents the flow of energy in these feeding relationships?
Page
5
GO ON
F
G
H
JSlide6
5
Analyze the food
web
above. Which animal receives the most energy originally produced by the plants in the food web?RabbitFrogOwl
Snake
Page
6GO
ONSlide7
6 Different organisms have
specific roles in cycling matter within
an
ecosystem.
Which type of organism has the role of recycling nutrients within the system?ProducerDecomposerPredatorJ ConsumerSlide8
Page
8
GO
ONWhich of the following statements best describes the flow of energy in the pyramid above?A
As you go higher in the pyramid, the amount of energy
increases. B There
is less energy in a producer level than a consumer
level. C
There
is
no
energy
above the level of producers in the system. D Each group receives only a small amount of the energy from the level below it. Slide9
Phytoplankton
consists mainly of single-celled algae.
They
live
in aquatic ecosystems and conduct photosynthesis. Which is the role of phytoplankton in an ecosystem?consumerdecomposerparasiteJ producer
Page
9
GO
ONSlide10
9 Animals are consumers, meaning
they
need
to eat food for energy because they
cannot make their own. Which energy transformation is taking place when an animal eats food so it can keep warm?A Mechanical to thermal B Mechanical to radiant C
Chemical to thermal
D Radiant to chemicalSlide11
When energy is
passing through
a
food
web, some of the energy is lost as heat. How much of the energy is passed from one level to the next?F 1%G 10%
H 50%
J 90%Slide12
A
group of students are investigating the transformation of energy
during
digestion. The initial temperature of hydrogen peroxide in a beaker is measured and recorded. Small pieces of liver are placed into a beaker of hydrogen peroxide and the temperature is measured and recorded every 30 seconds over
a two minute time period. The final temperature was
higher than the initial temperature.
What energy transformation is
under investigation in the scenario above?
Thermal energy transformed
into chemical
energy
Chemical
energy transformed into thermal energyChemical energy transformed into mechanical energy
Mechanical energy transformed into thermal energy
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12
GO
ONSlide13
12 Which of the following represents the correct order for the levels of organization of plants
and
animals?
cell, cell,cell,J
. cell,
o
rgan,
tissue,
organism
,
organ
system organ system, organ, tissue
,
tissue,
tissue,
organism
,
tissue
,
organ
,
organ
system
,
organism
organ
system
organism
Page
13
GO
ONSlide14
13 There are many processes
and systems
at
work
in the human stomach. The stomach is a part of which larger system?A respiratory B circulatory C digestive D nervousSlide15
14
Why
is it
necessary to
havein this equation? Sunlight
uses carbon dioxide and water to form sugar.
The arrow represents the specific direction of sunlight.
H The
process cannot occur without energy from the Sun. J
The
arrow tells the equation to
yield.Slide16
15 Which of
the
following organisms can undergo
photosynthesis?I. Animals II. PlantsIII. Fungi I and II
I and
III C II and
III D II
only
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