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4.1 Energy in Systems
By Jared Newton
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Last updated over 2 years ago
16 questions
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Question 1
1.
Define energy.
Question 2
2.
Define kinetic energy.
Question 3
3.
Define mechanical energy.
Question 4
4.
How do living things and machines use chemical energy?
Question 5
5.
How do living systems cause changes in energy?
Question 6
6.
What happens when energy moves to different organisms in an ecosystem?
Question 7
7.
Question 8
8.
Question 9
9.
Question 10
10.
Question 11
11.
Question 12
12.
Question 13
13.
Question 14
14.
Question 15
15.
Question 16
16.
Classify each item as either a model, matter, or energy.
Hints: There are 3 in each category. They are only used once in each category.
electrical
a food web
a bicycle
a rock
sound
a food chain
a tree
motion
the water cycle
Model
Matter
Energy
What will most likely happen if an animal consumes more food than it needs for the work it will do?
The extra chemical energy will be stored in its body.
Its body will change the extra chemical energy in the food into heat energy.
It will pass the extra chemical energy on to another animal that needs it.
The extra chemical energy will be removed from the body as waste.
What forms of energy does a lawnmower change the chemical energy from gasoline into?
light and fumes
heat and motion
sound and electrical
nuclear and light
A human changes chemical energy into heat and ___________________.
motion
molecules
light
nuclear energy
What happens to energy within a system?
it is used up
it changes form
it is increased
it remains unchanged
The initial source for all energy in a food chain is
plants
the sun
fruits
herbivores
Long distance runners often eat special snacks partway through their run. What is the most likely reason for this?
Their bodies do not convert chemical energy into motion energy very efficiently.
They need to stay hydrated because they have sweated so much water out.
They cannot eat before they run because it will make them sick.
Much of the chemical energy in their bodies has been used up and must be replaced for them to continue working.
The chemical energy from plants is changed to _______________________ in animals.
nuclear energy
light and heat
heat and motion
sound
What kind of energy does an organism receive from eating food?
electrical
solar
chemical
mechanical
Which system changes light energy to chemical energy?
car
cat
cannon
a cabbage plant