SCIENCE FLASHCARD

Front

Why do volcanoes and earthquakes occur in so many of the same areas?

Back

the crustal plates are moving

Front

In what direction does warmer material move in a convection current?

Back

up

Front

Materials found in nature that people and other living things use are ________________________.

Back

natural resource

Front

Waste products that damage an ecosystem is ___________________.

Back

pollution

Front

A ____________________ is the remains or traces of an organism that lived long ago.

Back

fossil

Front

In a sequence of rock layers, the oldest layer of rock is ___________________ of the sequence.

Back

at the bottom

Front

The youngest layer of rock is ____________________.

Back

at the top

Front

The outermost layer of the earth is about 3 to 30 miles thick. It is called the

Back

crust

Front

The second layer of the earth goes down 1800 miles. It is called the

Back

mantle

Front

HUGE slabs of rock called __________ float on molten rock below.

Back

plates