Thomas Q2 Midterm Practice Assessment

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What is an electron?

Back

An electron is a subatomic particle with a negative charge that orbits the nucleus of an atom.

Front

How does increasing temperature affect the rate of a chemical reaction?

Back

Increasing temperature increases the reaction rate because faster moving particles collide more often, leading to more chances for a reaction to occur.

Front

What are repeated trials in an experiment?

Back

Repeated trials are multiple attempts to conduct the same experiment to ensure the results are valid and reliable.

Front

What is the arrangement of particles in a liquid?

Back

In a liquid, particles are closer together than in a gas but farther apart than in a solid, and they have more energy than in a solid.

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties.

Front

What is a proton?

Back

A proton is a positively charged subatomic particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A neutron is a subatomic particle with no charge (neutral) that is found in the nucleus of an atom.

Front

What is the difference between a solid, liquid, and gas in terms of particle arrangement?

Back

In a solid, particles are closely packed and vibrate in place; in a liquid, they are close but can move past each other; in a gas, they are far apart and move freely.

Front

What is the significance of conducting multiple trials in experiments?

Back

Conducting multiple trials helps to minimize errors and increases the reliability of the results.