PMA 2 review 2023

Front

What is a balanced force?

Back

A balanced force occurs when two forces acting on an object are equal in size but opposite in direction, resulting in no change in motion.

Front

What is an unbalanced force?

Back

An unbalanced force occurs when two forces acting on an object are not equal, causing the object to accelerate in the direction of the larger force.

Front

What does a climate graph represent?

Back

A climate graph shows the average monthly temperatures and precipitation levels for a specific area over a period of time.

Front

What are the four main Earth systems?

Back

The four main Earth systems are the geosphere, hydrosphere, atmosphere, and biosphere.

Front

What is the hydrosphere?

Back

The hydrosphere includes all the water on Earth, including oceans, rivers, lakes, and water vapor in the atmosphere.

Front

What is the biosphere?

Back

The biosphere is the part of Earth where life exists, including land, water, and the atmosphere.

Front

What is igneous rock?

Back

Igneous rock is formed from the cooling and solidification of magma or lava.

Front

What is the process of melting sediments to form igneous rock?

Back

Sediments must be subjected to high temperatures to melt and form magma, which can then erupt as lava and solidify into igneous rock.

Front

What happens to light waves when they interact with an object?

Back

When light waves interact with an object, they can slow down and bend (refraction) if they enter at an angle.

Front

What is diffraction?

Back

Diffraction is the bending of waves around obstacles or through openings, which can occur with light waves.