Chemistry Review 2024

Chemistry Review 2024

Assessment

Flashcard

Science

6th - 8th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What happens to atoms during a chemical reaction?

Back

Atoms separate, rearrange, and new bonds form.

2.

FLASHCARD QUESTION

Front

What is a compound?

Back

A substance made of two or more different elements that are chemically bonded, e.g., water (H2O).

3.

FLASHCARD QUESTION

Front

What is evidence of a chemical change?

Back

The reaction produces heat.

4.

FLASHCARD QUESTION

Front

What are reactants in a chemical reaction?

Back

The starting substances that undergo change, e.g., 1 sodium and 2 chlorine in the reaction to form sodium chloride.

5.

FLASHCARD QUESTION

Front

What does the arrow in a chemical equation represent?

Back

It means 'forms', 'yields', or 'produces'; all of the answer choices are correct.

6.

FLASHCARD QUESTION

Front

What is the definition of a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products).

7.

FLASHCARD QUESTION

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded.

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