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6A Formative.Carry -A
By Caleb Guesno
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Last updated over 5 years ago
27 questions
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1. An ecosystem can only support a _______ number of species before _____ begin happening
wide; adaptations
limited; problems
population; decline
infinite; advantages
Sometimes a healthy ecosystem can be damaged when..
parasites are introduced into the ecosystem at various places
too many of a certain species eats all the food
humans get involved
animals start to attack each other too much
The carrying capacity
Is the capacity (ability) of an ecosystem to be able to carry or support a healthy number of a certain species
Is the ability an ecosystem to rebound from an ecological disturbance like a fire, tornado, flood, or any other natural disaster.
What variables (limiting factors) can effect the carrying capacity
Sustainability (lasts a long time) of food sources
Abundance (a lot) of resources
Competition for food from other species
Habitat
Natural disasters
Sturgeons eat __________ and gizzard shads
Chicken
Phytoplankton
Lake flies
What would limit the sturgeons growth or carrying capacity <2 answers>
The presence of competitors like the wall-eyed eating too much shad
The lack of sunlight and space in the lake
Eating so much sturgeon that they have trouble reproducing
Biologists help regulate the number of sturgeon
By filtering the lake of sturgeon
By issuing licenses for hunters to kill sturgeon or wall-eyed species of fish
By introducing predators
By setting the lake on fire
A thousand years ago there was only ______ people
½ of a billion
1/8 of a billion
1/3 of a billion
¼ of a billion
In 2011, the population grew to ___
9 billion
8 billion
10 trillion
7 billion
Drips of water being added to the glass represents
Food being eaten
Mates
People dying (deaths)
People being born (births)
As water drips out of the glass, it represents
Food being eaten
Mates
People dying (deaths)
People being born (births)
Today most people live in... <select all that apply>
India
Russian
Africa
America
the rest of Asian
China
For centuries the population size stayed the same mainly because
births
were canceled out by...
Food being eating
People being born (births)
People dying (deaths)
Mates
True or false: centuries ago most women that had babies would die before they could start families
True
False
The worlds human population reaches 1 billion at
1804
2011
1992
1805
Better agriculture and better medicine slow
People dying (deaths)
People being born (births)
Mates
Food being eaten
After 1804 people still die but
More babies grow up to have families
Less babies grow up to have families
We grew from 1 billion to 7 billion and it only took
7 years
20 years
200 years
The UN says our population will level out or reach carrying capacity at..
9 billion
10 billion
11 billion
15 billion
The question is if our earth can hold all those people. This depends on how well we can manage our..
food
water
energy
Sharks are essential to a healthy marine ecosystem because
they eat sick, weak, and injured animals
they eat healthy thriving fish
This keeps populations
Healthy and unbalanced
Healthy and balanced
Sharks are being killed at 2-3 sharks every _______
minute
hour
second
___ to ____ million sharks are killed per year
70 to 100
70 to 80
70 to 60
Sharks are killed for their ___ which is used for soup
Teeth
Tails
Fins
Without sharks it's like living without an immune system
Fisheries suffer
The ecosystem will collapse from disease and sickness and reefs start to degrade
The ecosystem will survive from immunity