Food Chains
Food Web
Mixed Bag
Force and Motion
Simple Machines
100
What is the main energy source for life on earth?
A. Electricity
B. Soil
C. Sunlight
D. Water
c. Sunlight
100
A system of OVERLAPPING FOOD CHAINS in which the flow of energy branches out into many direction is called what?
A. Food web
B. Sunlight
C. Habitat
D. Food chain
A. Food web
100
Algae -> Small Fish -> Catfish
In the food chain above, which organism(s) are consumers?
small fish and catfish
100
A book is sitting on a table. This is an example of...
a. unbalanced forces
b. balanced forces
c. friction
d. force
b. balanced forces
100
What simple machine is this?
Wedge
200
In the food chain, a PRODUCER is?
A. Plant that makes its own food
B. A plant that consumes other organisms for energy
C. A plant breaks down dead organisms
D. Always at the end of the food chain
A. Plant that makes its own food
200
When the food source for an animals becomes scarce, what could happen to the animal?
a. The animal thrives.
b. The animal moves.
c. The animal becomes extinct.
b. The animal moves.
200
Flies and worms are ___________________ because they eat the remains of dead plants and animals. They help dead things "break down" into nutrients.
A. Herbivores
B. Decomposers
C. Producers
D. Omnivores
B. Decomposers
200
Alan and Enrique are pulling on a rope on one side. Esther is pulling on the rope on the other side.
What would describe the forces?
a. balanced forces
b. unbalanced forces
c. gravity
d. friction
b. unbalanced forces
200
A heavy object could be rolled up this simple machine, instead of lifting it straight up. Using this simple machine can save effort, although the object must usually cover more distance if this simple machine is used...
a. lever
b. incline plane
c. wheel and axle
d. wedge
b. inclined plane
300
In the food chain above, which organism has the role of producer?
Grass
300
Create one food chain (words and arrows) from the food web.
Ex: Plants -> rabbit -> Owl
Ex: Plants -> deer -> mountain lion
300
Work has happened if...
a. the object moves position
b. the object has more mass
c. the object has more speed
d. the object has a new direction
a. the object moves position
300
Jack throws a ball in the air at recess. What force is it that pulls the ball towards the Earth?
a. friction
b. mass
c. gravity
d. direction
c. gravity
300
What simple machines hold two objects together?
Screw
400
What do the arrows represent in the food chain above?
Energy (the flow of energy from one organism to the next)
400
What are the TWO producers in this ecosystem?
Seaweeds and Phytoplankton
400
Using the graph above, what is true of the deer population?
a. They did not have enough organisms to consume.
b. They were being overly hunted by predators.
c. The deer had their needs met, and were thriving.
d. The fox and mountain lion population is declining.
c. The deer had their needs met, and were thriving.
400
Two cars are pushed down the same ramp at the same time. The red car is 100 grams. The blue car is 50 grams. Which car will go the furthest?
a. Red car, because it is more mass.
b. Blue car, because it is more mass.
c. They will travel the same distance.
d. Red car, because it has less mass.
a. Red car, because it is more mass.
400
In a lever, how where can the fulcrum be placed to best lift a heavy load?
a. Closest to the load reduces the effort.
b. Closest to the effort reduces the effort.
c. Closest to to the load increases the effort.
d. Closest to the middle reduces the effort.
a. Closest to the load reduces the effort.
500
What would happen to the shrew population if the grass were to be destroyed?
a. The shrew would not change.
b. The shrew population would decrease, because the grasshoppers would decrease.
c. The shrew population would decrease, because the owl population would decrease.
d. The shrew population would increase, because there would be an increase in grasshoppers.
b. The shrew population would decrease, because the grasshoppers would decrease.
500
Select which two will happen to the producers and top level consumers if there is an over-abundance of rabbits?
a. Producers will increase, because there is a greater need.
b. Producers will decrease, because more rabbits will be consuming the producers.
c. Top-level consumers will increase, because of the availability of prey.
d. Top-level consumers will decrease, because of being hunted by rabbits.
b. Producers will decrease, because more rabbits will be consuming the producers.
c. Consumers will increase, because of the availability of prey.
500
Which organisms provide energy for the plants?
The Sun
500
If Evelyn is trying to push a box across her room, but cannot move the box. Which would help her move the box?
a. Evelyn can try to pull the box.
b. A friend can push the box in the same direction as Evelyn.
c. A friend can push the box in the opposite direction as Evelyn.
d. She can add more mass to the box.
b. A friend can push the box in the same direction as Evelyn.
500
Max must help his brother move their new stove into the house. He must help unload stove from the moving truck, put it on a moving cart, prop open the front door of the house and unload the stove in the kitchen.
What three simple machines did he use?
Max will need to use an inclined plane to unload the stove from the truck, a wheel and axle for the moving cart, and a wedge to prop open the front door.