Earth Science Ch 1-5 1st Sem. test

Front

What is data in scientific observation?

Back

Data refers to the information gathered from observations or experiments, such as measurements or descriptions.

Front

What layer of soil contains humus?

Back

The A Horizon, also known as the topsoil, contains humus, which is decomposed organic matter.

Front

What is a key characteristic of most rocks?

Back

Most rocks are a mixture of minerals, rather than being composed of only one mineral.

Front

What are the particles in the nucleus of an atom?

Back

The particles in the nucleus of an atom are protons and neutrons.

Front

What happens to a rock during chemical weathering?

Back

During chemical weathering, a rock changes into one or more new compounds due to chemical reactions.

Front

Define humus.

Back

Humus is the organic component of soil formed by the decomposition of plant and animal matter.

Front

What is the difference between the A Horizon and B Horizon in soil?

Back

The A Horizon is the top layer rich in organic material (humus), while the B Horizon is the subsoil that accumulates minerals leached from the upper layers.

Front

What is the definition of a mineral?

Back

A mineral is a naturally occurring, inorganic solid with a definite chemical composition and a crystalline structure.

Front

Explain the process of weathering.

Back

Weathering is the breakdown of rocks into smaller pieces through physical, chemical, or biological processes.

Front

What is the role of protons in an atom?

Back

Protons are positively charged particles found in the nucleus of an atom and determine the element's identity.