Dichotomous Keys
Food Webs
Impacts on Env
Invasive species
Random facts
100
A dichotomous key always gives you how many choices at each step?
Two
100
Which of these is the producer?
Carrot
100
How can plastic pollution affect animals in a food web?
Animals may eat plastic or become tangled in it and die
100
What is an invasive species?
An invasive species is a species introduced to an area where it does not naturally belong and causes harm.
100
What is a group of Kangaroos called?
A Mob
200
When making a dichotomous key, should the choices be based on physical characteristics or behavioural characteristics?
Physical
200
Which of these is the primary consumer?
Grasshopper
200
What is one way land clearing can affect a food web?
It removes habitat and food sources.
200
How can invasive rabbits affect an ecosystem?
They overgraze plants and damage soil.
200
What animal can taste with their feet
Butterflies
300
Why is it important to only have 2 choices that are opposite to each other (wings/no wings) or yes or no?
So that the organism can only fit into one choice
300
What do the arrows show in a food web?
The energy moving through the ecosystem
300
What abiotic factors would be impacted by a bush fire?
temperature, light and water
300
Why are cane toads dangerous to some native predators?
Native predators that try to eat cane toads can become sick or die, which can change the balance of the food web.
300
What is the science of grouping living organisms based on their features?
Classification
400
Why do scientists use dichotomous keys?
To identify and classify individual organisms
400
If the number of grasshoppers decreased, what would happen to the snake population?
The number of frogs would decrease and then the number snakes would decrease
400
A drought causes the grass to die, what happens to the animals in the ecosystem?
Grasshoppers may decrease, then frogs may decrease, then snakes may also decrease.
400
Name two control method used to reduce cane toad numbers.
Any of the following: hand collecting, trapping, fencing around breeding areas, removing eggs from water, or community “toad busting” events.
400
Animals with backbones belong to what group?
Vertebrates
500
A student makes this step in a dichotomous key:
1a. Organism is scary
1b. Organism is not scary
What is wrong with this step?
It uses an opinion, not an observable feature
500
Why are food webs more useful than food chains?
Most organisms eat more than one thing and are eaten by more than one predator.
500
Frogs have been removed from this environment. What might one outcome be?
-All the grass would die because too many grasshoppers would be there
- snakes would have no food and die
500
Why can it be difficult to completely remove an invasive species once it has spread?
Because invasive species can reproduce quickly, spread over large areas and be hard to find.
500
If an organism creates its own food it is called a...
Autotroph