8th Grade Science 1st semester

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What does Newton's Second Law state?

Back

Newton's Second Law states that the force acting on an object is equal to the mass of that object multiplied by its acceleration (F = ma).

Front

What is surface tension?

Back

Surface tension is the tightness across the surface of a liquid that allows it to resist an external force. It is caused by the cohesive forces between liquid molecules.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a type of mixture where the components are not uniformly distributed, and different parts can be seen (e.g., salad, oil and water).

Front

What is adhesion?

Back

Adhesion is the tendency of dissimilar particles or surfaces to cling to one another, such as water molecules sticking to skin.

Front

What is cohesion?

Back

Cohesion is the attraction between molecules of the same substance, which causes them to stick together, such as water molecules attracting each other.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together (e.g., water, H2O).

Tags

NGSS.MS-PS1-1

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each retains its own properties and can be separated by physical means.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout, and the different components are not distinguishable (e.g., saltwater).

Front

What is the formula for calculating force?

Back

The formula for calculating force is F = ma, where F is force, m is mass, and a is acceleration.

Tags

NGSS.MS-PS2-2