Semester 1 Review

Front

What happens to the potential energy of a rock as it falls off the side of a cliff?

Back

The potential energy decreases as the kinetic energy increases.

Front

What tool is BEST to use to compare the masses of potato slices in an experiment with salt water?

Back

A triple beam balance.

Front

Which elements are in the same period on the periodic table?

Back

F & B.

Front

What is the law of conservation of mass in a chemical reaction?

Back

The mass of the reactants before the reaction is equal to the mass of the products after the reaction.

Front

How do you calculate the mass of an object if a horizontal force is applied and it accelerates?

Back

Use Newton's second law: F = ma, where F is the net force, m is mass, and a is acceleration.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv².

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, often calculated as PE = mgh.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is the formula for calculating density?

Back

Density = mass/volume.

Front

What is the role of a control in an experiment?

Back

A control is a standard for comparison that helps to ensure that the results of an experiment are valid.