STAAR SCIENCE 8TH REVIEW

Front

What is the formula for calculating density?

Back

Density = Mass / Volume

Front

What is the density of an object with a mass of 14g and a volume of 2cm³?

Back

7 g/cm³

Front

What evidence indicates a chemical reaction has occurred when baking a cake?

Back

The cake rises as gas bubbles form in the baking cake.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is an example of Newton's First Law in action?

Back

A magician pulls a tablecloth out from under dishes without disturbing them.

Front

How do you balance a chemical equation?

Back

By ensuring the number of atoms for each element is the same on both sides of the equation.

Tags

NGSS.MS-PS1-5

Front

What is the balanced equation for the reaction of iron and oxygen to form iron(III) oxide?

Back

4Fe + 3O₂ -> 2Fe₂O₃

Tags

NGSS.MS-PS1-5

Front

What is the definition of a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the role of gas bubbles in baking?

Back

Gas bubbles cause the cake to rise, creating a light and fluffy texture.

Front

What is the significance of mass in determining density?

Back

Density is directly proportional to mass; as mass increases, density increases if volume remains constant.