NEW
Font size
WorksheetsVQ Humans and ecosystem and Carbon cycle
Total questions: 20
Worksheet time: 15mins
Which process scrubs atmospheric carbon dioxide eventually storing carbon as organic compounds while releasing Oxygen as a waste/by product?
Cellular respiration
Photosynthesis
Carbon fixation
Pollution
80% of all carbon is trapped as inorganic carbonates as part of the
lithosphere
hydrosphere
biosphere
atmosphere
Fossil fuels--coal, petroleum and natural gas make up ___ of carbon
0.006%
20%
80%
5%
One way carbon is cycled back into the atmosphere is by ___
Photosynthesis
the greenhouse effect
burning fossil fuels
carbon fixation
Before photosynthetic organisms populated earth, earth's atmosphere contained ammonia, nitrogen, carbon dioxide and
oxygen
methane
silver
glucose
Global warming is caused by trapped _________ in earth's atmosphere
inorganic carbonates
natural gas
fossil fuels
greenhouse gases
Glucose + Oxygen → Carbon dioxide + Water + Energy
is the equation for this process
photosynthesis
cellular respiration
evaporation
carbon fixation
One contributing factor to human impact on the ecosystem is population size. In Los Angeles county the human population has doubled over the last 50 years. The world population is ____over 100 years
4 times larger
2 times larger
constant
decreasing
After the industrial revolution in the 1800s improved medicine and nutrition helped increase human lifespan from _______________
29 years to over 70 years today
50 years to 60 years today
20 years to 40 years today
70 yeas to 80 years today
Water, trees, minerals and air are examples of ____
pollution
nonrenewable resources
surplus goods
natural resources
Humans have hunted species to extinction. The Bison population was almost near extinction when its population dropped from > 30 million to < 1000. Protective laws were written and preserves set aside causing
an increased population to 300,000 today
fewer bison to survive to maturity
a decrease in bison population to 300
no change in the bison population
Crude oil usage today is 30 times higher today than it was 30 years ago. This is problematic in that crude oil is___
a renewable resource
a nonrenewable resource
a surplus good
plentiful
_______________ is a/are possible solution(s) to the crude oil crisis.
Solar energy
Biodiesel
Public transportation and not idling
All of these
In addition to reducing, reusing and recycling, One solution to the growing plastic usage and pollution is
bioplastic made from plants
biodiesel
biosphere reduction
hunting monk seals
Of all water on earth, ____ is fresh water. Humans use 4 times the amount of fresh water than used 50 years ago.
<1%
10%
5%
25%
The process used to convert salt water to fresh water is called _______
filtration
evaporation
reverse osmosis
hydrolysis
The process by which CO2 is converted into carbon compounds like sugar
condensation
cellular respiration
carbon fixation
combustion
The amount of carbon dioxide and other carbon compounds emitted due to the consumption of fossil fuels by a particular person, group, etc.
greenhouse effect
aurora borealis
carbon footprint
carbon dating
To prevent the pollution and contamination caused by seagulls feeding continuously in the landfills as they have done historically, one Los Angeles landfill
uses a falconer and a hawk
covers the landfill with a net
recycles gases
does nothing
A career that protects both plant and animal species, habitats, and ecosystems and focuses on human impact on the environment and possible solutions
chemical engineer
ecologist
conservation biologist
biology teacher
