Lesson 1.1 and Lesson 1.2 Review

Front

What is a diatomic element?

Back

A diatomic element is a molecule that consists of two atoms of the same or different chemical elements. An example is Oxygen (O₂).

Front

What is adhesion?

Back

Adhesion is the attraction between different substances.

Front

What property of water allows it to be absorbed by a paper towel?

Back

The property of water observed when cleaning a spill with a paper towel is adhesion.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

Which of the following is NOT an example of matter?

Back

Light is NOT an example of matter.

Front

What is the definition of a chemical element?

Back

A chemical element is a pure substance that cannot be broken down into simpler substances by chemical means.

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 surface tension?

Back

Surface tension is the cohesive force at the surface of a liquid that makes it behave like a stretched elastic membrane.

Front

What is a solution?

Back

A solution is a homogeneous mixture of two or more substances, where one substance is dissolved in another.

Front

What is the role of water in biological systems?

Back

Water is essential for life; it acts as a solvent, regulates temperature, and is involved in biochemical reactions.