Q2 ULTIMATE EXAM REVIEW- 8th GRADE 24-25

Front

What is the strongest acid among the following: orange juice (pH 4), bleach (pH 12.5), lemon juice (pH 2), oven cleaner (pH 13)?

Back

Lemon juice (pH 2) is the strongest acid.

Front

How is lemonade classified if it consists of several substances that are not chemically combined?

Back

Lemonade is classified as a mixture.

Front

What is the main difference between homogeneous and heterogeneous mixtures?

Back

In homogeneous mixtures, the ingredients are so evenly mixed that they cannot be visibly distinguished, while in heterogeneous mixtures, the ingredients are visible.

Front

What happens to the mass of a box and crystal after the crystal is broken into pieces?

Back

The mass remains the same.

Front

What is the difference between iron and brass?

Back

Brass is a compound, while iron is not.

Front

Define a mixture.

Back

A mixture is a combination of two or more substances that are not chemically bonded.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the components are uniformly distributed and cannot be distinguished.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components are not uniformly distributed and can be distinguished.

Front

What is an element?

Back

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

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.