Chemistry STAAR Questions

What is the left part of a chemical equation called?
H_{2 +} O → H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

Why are the noble gases such as helium (He) and neon (Ne) grouped together in the periodic table?

• They are nonreactive gases.

• They are highly reactive metallic solids.

• They are dangerous gases when combined with water.

• They are liquid at room temperature and have high boiling points.

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

• During a chemical reaction, the total amount of matter stays the same.

• During a chemical reaction, matter is destroyed.

• During a chemical reaction, one or more new substances are formed.

• During a chemical reaction, the total number of atoms increases.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A researcher combines 37 grams of iron with 16 grams of oxygen. Based on the Law of Conservation of Mass, what will be the resulting mass of the product?

• 16 grams

• 21 grams

• 37 grams

• 53 grams

Tags

NGSS.MS-PS1-5

Which statement is true of the two elements' reactivity?

• Both are chemically reactive.

• Both are chemically nonreactive.

• Element X is more chemically reactive than Element Y.

• Element Y is more chemically reactive than Element X.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which element has chemical properties that are MOST similar to the chemical properties of Sulfur?

• Silicon

• Chlorine

• Selenium

• Phosphorus

What is the product of a chemical reaction between an acid and a base?

• Salt

• Water

• Both A and B

• Carbon dioxide

Which statement is true of the two elements' reactivity?

• Both are chemically reactive.

• Both are chemically nonreactive.

• Element X is more chemically reactive than Element Y.

• Element Y is more chemically reactive than Element X.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What is the term for the amount of matter in an object?

• Weight

• Density

• Mass

• Volume

Which of the following is a chemical change?

• Dissolving salt in water

• Boiling water

• Burning wood

• Melting ice

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5