As more people have moved to the beach, the sea turtle population has
decreased. Which is most likely the cause of this decrease?
A tropical storms
B increase in predators
C habitat loss
D warmer temperatures

C.  Habitat loss

Which process allows green plants to control the amount of water stored in their
leaves?
A photosynthesis
B condensation
C respiration
D transpiration

D.  Transpiration

In a grassland ecosystem, if the population of eagles suddenly decreased, what
will most likely be the effect on the rest of the ecosystem?
A The ecosystem will become overpopulated with snakes.
B There will be a decrease in the population of snakes in the ecosystem.
C The nutrition of the soil in the ecosystem will decrease.
D More types of plants will begin growing in the ecosystem.

A.  The ecosystem will become pverpopulated with snakes.

How would the woodpecker population in a forest area most likely be affected if a
housing development is built in that area?
A They would produce more offspring.
B They would change the color of their feathers.
C They would experience a decrease in available food.
D They would experience a decrease in competition.

C.  They would experience a decrease in available food.

Which is most responsible for recycling dead plants and animals in an ecosystem?

A.  water

B.  bacteria

C.  fish

D.  insects

B. bacteria

On a cold, cloudy day, the local weather forecaster predicts that a high-pressure
system will be moving into the area in the next 24 hours. Which weather
conditions will this system most likely bring to the area?
A stormy
B sunny
C snowy
D hot

B. Sunny

The weather forecast indicates that a warm front will be moving into the area in
the next 24 hours. Which type of weather will most likely result?
A clear skies and cold temperatures
B clear skies and hot temperatures
C cloudy skies and rainy weather
D heavy snow and ice

C.  Cloudy skies and rainy weather

Which is most responsible for the uneven heating of the air in the atmosphere?
A radiation
B convection
C conduction
D condensation

B.  Convection

Which best describes why winds at the beach change direction between day and
night?
A because the temperatures over land and over water change
B because warm air over land sinks and stays in place over land
C because cool air rises and is replaced by warm air from the ocean
D because cool air sinks and stays in place over land

A.  because the temperatures over land and over water change

Which will most likely result from a low-pressure weather system?
A warm temperatures
B cloudy conditions
C clear conditions
D cool temperatures

B.  Cloudy conditions

After a rain, a puddle of water remains on a sidewalk.  After a day of sunshine, the puddle is gone.  Which process is most responsible for teh disappearance of the puddle?

Evaporation

What must occur before clouds can form?

A.  Water vapor must get warmer.

B.  Water vapor must lose heat energy.

C.  Precipitation must begin to fall and run off.

D.  Transpiration must add water vapor to the atmosphere.

B.  Water vapor must lose heat energy.

One morning, Jane notices drops of water on the outside of a window. Later in the
day, she notices that the drops have disappeared. What most likely caused the
drops to disappear?
A The water condensed on the plants around the house.
B Energy from the sun caused the water to evaporate.
C The water cooled enough to turn into water vapor.
D Wind blowing on the window turned the water into vapor.

B Energy from the sun caused the water to evaporate.

Explain the process of water turning into water vapor?

The sun heats the water.  The water turns into an invisible gas called water vapor and rises into the atmosphere.

Explain the process of water vapor turning back into water?

Water vapor rises into the atmosphere and cools.  Once it cools, it turns back into a liquid (condenses) and forms a cloud.

Which will most likely cause a decrease in predator populations?
A an increase in prey populations
B a decrease in prey populations
C a decrease in decomposers
D an increase in producers

B.  A decrease in prey populations

Which is an example of a decomposer?
A a hawk
B a mouse
C a flower
D a mushroom

D.  a mushroom

Which organism is a producer?
A frog
B mushroom
C grass
D lizard

C.  grass

A simple food chain includes hawks, lizards, and insects. Which will most likely
happen to the lizard and hawk populations if a pesticide is sprayed to kill the
insects, and the lizard and hawk populations cannot find other food in this
ecosystem?
A Both the lizard population and the hawk population will increase.
B Both the lizard population and the hawk population will decrease.
C The lizard population will increase, but the hawk population will decrease.
D The lizard population will decrease, but the hawk population will increase

B.  Both the lizard population and the hawk pupultion will decrease.

Explain the parts of a food chain?

Producer - Plants

Consumers - Animals that Eat = Herbivores (eat plants), Omnivores (eat both), Carnivores (eat meat only)

Decomposers - Decompose dead plants and animals and put the nutrients back into the soil for producers to use.

Scavangers - Consumers that eat dead animals

Which has the greatest effect on wind speed?
A precipitation
B cloud cover
C wind direction
D air pressure

D.  Air pressure

Andy lives in the southern hemisphere. What season does he most likely
experience in August?
A spring
B summer
C winter
D autumn

C.  Winter

Which best describes a characteristic of the jet stream?
A It forms a boundary between a cold air mass and a warm air mass.
B It creates the high winds around the eye of a hurricane.
C It forces the hot air along the equator to rise to areas in North America.
D It causes high pressure air masses to rotate clockwise.

A.  It forms a boundary between a cold air mass and a warm air mass.

What will most likely result when the jet stream moves south of North Carolina?
A North Carolina will experience tropical weather conditions.
B North Carolina will experience hot, dry weather.
C North Carolina will experience mild weather.
D North Carolina will experience cold weather.

D.  North Carolina will experience cold weather.

What is the cause of rising surface temperatures of the Pacific Ocean, drought in
the western United States, and flooding on the Pacific coast of South America?
A the Gulf Stream
B the jet stream
C La Niña
D El Niño

D.  El Nino (remember El Nino means warmer)