The u. s. army corps of engineers began constructing in georgia for flood control in the 1940's and 1950's.

a)
dams

b)
levees

c)
storm drains

d)
barrier islands

a circuit connecting the switches, light-bulbs and buzzers must start and end at the power source before the circuit can work. the carries the current throughout the circuit.

a)
battery

b)
light-bulb
eliminate

c)
switch

d)
wire

this graph shows erosion patterns in relation to wind speed over the course of a 24-hour period in an arizona desert. the jagged line represents the wind speed in meters per second (mps) throughout the day, while the bold line containing a small cluster of peaks toward the bottom of the graph represents sand movement. the movement was measured by an instrument called a sensit, which is a sand-movement indicator. look at the movement of sand marked by the red arrow and compare it to the wind speed.

based on the data shown, what general statement can be made about wind speed and the movement of sand in this study?

a)
sand movement decreased as wind speed increased.

b)
sand moved only when winds were greater than 14 mps.

c)
as wind speed increased, the movement of sand increased.

d)
time of day has more affect on sand movement than wind speed.

when magnets come within the magnetic fields of other magnets, they move toward or away from each other, depending on their poles. the door latch shown in the picture is one of many ways magnets can be used in everyday life. how are magnets most likely used in this latch?

a)
magnets with opposite poles are attached to the door and floor, when they come in contact, they attract one another and latch the door.

b)
the magnets are extremely heavy, so when the door is open, the latch on the floor pulls on the magnet, making the door too heavy to close.

c)
the door magnets are turned on and off by the switch on the floor. when the door is over the latch, the magnets turn on, latching the door in place.

d)
magnets with similar poles are placed on the floor latch and on the door, which attract one another when they are close, latching the door in place.

elephants, alligators, lions, oh my! it is your job to group these four animals based on like features. first you group the animals by size: very large and not very large. into the very large group you put the giraffe and elephant. you are left with the lion and alligator. what feature could you use to put these two animals into different groups?

a)
has teeth or has no teeth

b)
eats meat or eats plants only

c)
has four legs or has two legs

d)
lives on land or lives in the water
eliminate