2nd 9 WK Mid Assessment CORRECTIONS

Front

What is a chemical reaction?

Back

A process where substances (reactants) undergo a transformation to form new substances (products), often involving changes in energy and properties.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What is a divergent plate boundary?

Back

A tectonic plate boundary where two plates move away from each other, often resulting in the formation of new crust.

Front

How many atoms are in an oxygen molecule (O2)?

Back

2 atoms.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is acceleration?

Back

The rate of change of velocity of an object, often measured in meters per second squared (m/s²).

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of the substance.

Front

What is the role of energy in chemical reactions?

Back

Energy is required to break bonds in reactants and is released when new bonds form in products.

Front

What are tectonic plates?

Back

Massive slabs of Earth's lithosphere that move and interact at their boundaries, causing geological activity.

Front

What is the significance of observing processes in nature?

Back

Observing natural processes helps scientists understand the laws of physics and chemistry that govern the natural world.