REVIEW

UNIT 23-24 EXAM REVIEW 7 T H GRADE

WHEN YOU DUMP OILS AND CHEMICALS ON THE GROUND, WHERE DOES IT END

UP GOING?

In the ground and pollutes ground water

or

Pollutes a lake or ocean from run off

IF THE NUMBER OF ORGANISMS INCREASED BUT THE NUMBER OF SPECIES DECREASED, WHAT HAS

HAPPENED TO BIODIVERSITY?

Biodiversity has decreased as well

IF A SMALL METEOR CRASHED INTO EARTH AND

DUST CLOUDED A LARGE AREA FOR A FEW MONTHS, WHAT WOULD HAPPEN TO LIFE AND CLIMATE IN THAT

AREA?Life would diminish without sunlight –

producers can’t produce, consumers starve.

Climate – gets colder

IF POLLUTION MOVES THROUGH THE GROUND

AND INTO THE ROCK, WHAT TYPE OF WATER IS

BEING AFFECTED?

Groundwater (water being used as wells)

WHAT FORCE CONTINUES TO CHANGE THE

COASTLINE OF TEXAS?

Wave Action – water from waves

RIVERS MOVE SEDIMENT TO THE OCEAN. WHAT CHANGE

WOULD BUILDING A DAM HAVE ON THE DEPOSITION OF

SEDIMENT?

Sediment would deposit in the lake formed from the dam

WHAT NEGATIVE AFFECT DOES FERTILIZER HAVE ON THE ENVIRONMENT?

*It can be washed into streams

*Causes an overgrowth of algae

WHAT IS MOST LIKELY TO HAPPEN WHEN IT RAINS ON A

SLOPE WHICH HAS LITTLE VEGETATION ?

Mudslide. A great amount of erosion

WHAT CATASTROPHIC EVENT WOULD HAVE THE BIGGEST

CHANGE ON THE AMOUNT OF WATER AVAILABLE TO PEOPLE WHO RELY ON GROUNDWATER

AS A DRINKING SOURCE?

A DROUGHT. No water for a long period of time.

SOIL EROSION IS A COMMON PROBLEM ON RIVER BANKS. WHAT

SHOULD BE DONE TO HELP PREVENT SOIL EROSION?

WHY DO THIS?

Plant something so the roots can hold the soil back.

WHAT WOULD A LANDSLIDE DO TO THE ENVIRONMENT AND WHAT WOULD

ANIMALS NEED TO DO IN ORDER TO SURVIVE?

A landslide would destroy habitats and bury food sources so the animals would need to move to a new location.

WHAT IS THE MOST COMMON CAUSE OF POLLUTION IN

STREAMS, RIVERS, LAKES AND OCEANS?

Run off from yards, farm fields, streets, and paved roads.

WHAT LANDFORMS IN TEXAS WOULD TAKE MORE THAN A WEEK TO BE MADE

IN NATURE?

Beaches, canyons, valleys, mountains

WHAT BIOME IN TEXAS IS TO BE MOST AFFECTED BY EROSION CAUSED BY

WIND?

Desert

WOULD IT BE A GOOD IDEA TO BURY CHEMICALS UNDERGROUND TO

PREVENT CONTAMINATION OF OUR LAKES, RIVERS AND OCEANS? WHY?

No because it can contaminate ground water which many people use to drink

SAN ANTONIO HAS VERY HILLY TERRAIN, WITH SPARSE VEGETATION. WHAT NATURAL DISASTER WILL MOST LIKELY OCCUR IF A SLOW MOVING THUNDERSTORM DEPOSITS HEAVY RAIN IN A SHORT PERIOD OF TIME?

A Flash Flood

IF GASOLINE LEAKS FROM AN UNDERGROUND STORAGE TANK, WHAT AFFECT COULD THIS

HAVE ON THE WATERSHED?

Ground Water could be contaminated

Note: Gas is the most toxic substance found in groundwater

VOLCANIC ERUPTIONS DEPOSIT LAVA ON THE SURFACE OF THE EARTH. WHAT ACTION IS A

GOOD BALANCE TO THIS DEPOSITION?

Weathering

Note: lava cools down and becomes rock