SCIENCEFifth GradeWeek Three

•Constructive processes create landforms. Is a volcanic eruption or weathering a constructive force?

•volcanic eruption

•Destructive processes destroy landforms. Are landslides or deposition an example of a destructive force?

•landslides

•Which is mostly to be caused by an earthquake, a tornado or a landslide?

•landslide

•Most coastal areas of South Carolina can be rapidly changed by severe flooding. Flooding is often caused by which natural disaster a tornado or a hurricane?

•hurricane

•What formation is created at the place where magma escapes from the Earth?

•a volcano

Letter A represents what geological

structure of the ocean floor?

•continental shelf

Letter D represents the deepest part of the ocean basin called

___________.

•trench

• In the center of the highest part of the mid-ocean ridge is a narrow trench called a______________.

•rift

• The steep slope where the continental shelf drops to the bottom of the ocean floor is called____________.

•continental slope

•Trenches, abyssal plains, and rift valleys are all examples of_______________.

•geographic features of the ocean floor

• The barrier islands off the Atlantic coasts are constantly threatened

by___________.

•erosion from tides and storms

• A deep valley with high steep sides is a continental landform called a canyon. What is the same feature called when it is formed on the ocean floor?

• trench

• Land which rises high above the ground on land is called a mountain range. What is it called when it is formed on the ocean floor?

•mid-ocean range

•Which feature of the ocean shore zone is shaped by wind?

•sandy beaches

•What is the area called where fresh water meets salt water?

•estuary

What causes waves?

•Most waves are caused by winds that are blown over the surface of the water.

•What are tides and what causes them?

• The regular rise and fall of the waters in oceans and seas are called tides. They are caused by the pull of the Moon’s gravity on Earth.

• Human activity, garbage dumped at sea , garbage dumped in rivers, garbage dumped down drains and oil spills are all examples of what kind of pollution?

•ocean pollution

•What are natural resources?

• These are the materials that people can take and use from the Earth. (air, water, trees, rocks and minerals, soil, oil and coal)

•What is conservation?

•The wise use of natural resources.