7th Grade Science Semester Exam

Front

TRUE/FALSE: A trench can be formed by a convergent plate boundary

Back

True

Front

What are convection currents?

Back

The cycle of heated rock or metal rising, and cooling rock or metal falling.

Front

Which fossil is older: Fossil D or Fossil C?

Back

Fossil D is older than Fossil C.

Front

What causes the Earth's magnetic field?

Back

Moving iron causing electric currents in the Earth's core.

Front

Approximately how old is the Earth?

Back

4.6 billion years.

Front

What is a convergent plate boundary?

Back

A tectonic plate boundary where two plates collide, often forming trenches or mountains.

Front

Define sedimentary rock.

Back

Rock formed by the accumulation of sediment, often containing fossils.

Front

What is the rock cycle?

Back

The continuous process of rock formation, breakdown, and reformation.

Front

Explain the theory of plate tectonics.

Back

The theory that Earth's outer shell is divided into several plates that glide over the mantle.

Front

What is the significance of fossils in rock layers?

Back

Fossils help determine the relative ages of rock layers and the history of life on Earth.