Midterm 24-25 Study Guide

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It occurs when two surfaces come into contact with each other.

Front

What does it mean for an object to be in motion?

Back

An object is in motion if it changes its position relative to a reference point over time.

Front

What is work in physics?

Back

Work is done when a force causes an object to move. It is calculated as the product of the force and the distance moved in the direction of the force.

Front

What is displacement?

Back

Displacement is the shortest distance from the initial to the final position of an object, along with the direction.

Front

What indicates a chemical change has occurred?

Back

The production of bubbles is a common indicator of a chemical change.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include oxygen and carbon.

Front

What is the chemical formula for ammonium acetate?

Back

The chemical formula for ammonium acetate is NH4C2H3O2.

Front

How many atoms of nitrogen are in NH4C2H2O2?

Back

There is 1 atom of nitrogen in the chemical formula NH4C2H2O2.

Front

How many atoms of hydrogen are in NH4C2H2O2?

Back

There are 6 atoms of hydrogen in the chemical formula NH4C2H2O2.

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.