Science Final Review

A person introduced a fish from a home aquarium to a pond ecosystem. This new fish
loves to eat tadpoles (baby frogs).
What would happen in this pond ecosystem if all the frogs were removed?

• The fish population would decrease.
• The number of dragonflies would increase
• The grass would grow over the water.
• The squirrels would have nothing to eat.

The saguaro cactus is one physical characteristic of the Sonoran Desert. The cactus
supports the community through all these ways EXCEPT―

• providing a perch for a hawk
• providing food for the jackrabbit
• providing a home for the coyote
• providing shade for the rattlesnake

A massive flood event occurred in Queensland, Australia. In the areas where water rose slowly, wildlife were able to move to safer areas. In areas where water rose
rapidly, animals such as wallabies, mice, snakes and insects perished.
After the floodwaters recede, which organisms will most likely thrive?

• Decomposers
• Predators 
• Producers
• Prey

The animals are included in the physical characteristics of the desert. The jackrabbit
supports the community by ―

• providing energy for the coyote and hawk
• providing companionship for the lizzards
• providing food for the lizards and insects
• providing a pet for the people who live there

The grass in a terrarium environment supports the cricket population in all of the
following ways EXCEPT ―

• providing shelter
• providing nutrition
• providing water
• providing light

A farmer is growing apples to sell at the farmer’s market. As he was watering his
apple trees he noticed a decline in the bee population. The loss of bees changed the
food chain.
These changes affected the ecosystem in all the following ways EXCEPT ―

• The plants produce fewer seeds
• the apple trees did not produce as much fruit
• the apple blossoms were beautiful
• butterflies lost an important food source

Students decided to build their own terrarium so they can study how the physical characteristics of an environment support a community. The terrarium has plants, grass, crickets, water, and a lizard. Which organism in the terrarium starts the flow of energy through the food chain?

• cricket
• water
• grass
• lizzard

Which food chain most accurately demonstrates the flow of energy in a shortgrass prairie ecosystem?

• grasshopper -> bird  -> rodent -> buffalo
• hawk->snake-> mouse ->hawk
• grasshopper-> mouse ->  snake->  hawk
• snake -> hawk -> skunk  mouse 

Which letter shows the adult stage of the frog's development?

• A
• B
• C
• D

Pine trees and many other evergreen trees have thick bark. When will this structure help a tree live longer?

• when there is little sunlight available
• when there is a lot of fog
• when the climate is cold
• when floods wash away the soil