Chem & Changes in Matter Review

Which of the following substances is a compound?

• A. CO

• B. O2

• C. O3

• H2

Tags

NGSS.MS-PS1-1

How many elements are found in the following compound? NaHCO3 Enter your answer in the box

Tags

NGSS.MS-PS1-1

Which of the following observations is evidence of a chemical reaction?

• A. Liquid water evaporated and formed a vapor

• B. Paper burned and formed smoke

• C. Yellow and red liquids were mixed and made an orange liquid

• D. As methane condensed it formed a liquid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Students study the differences between chemical and physical changes and created a table with examples of each. Select ALL of the physical changes listed below

• dissolving sugar

• digesting food

• cutting paper

• frying an egg

• milk souring

Students study the differences between chemical and physical changes and created a table with examples of each. Select ALL of the chemical changes listed below

• dissolving sugar

• digesting food

• cutting paper

• frying an egg

• milk souring

Tags

NGSS.MS-PS1-2

In an experiment, a student adds baking soda (sodium bicarbonate) to vinegar (acetic acid) and observes that a large amount of gaseous carbon dioxide is released. What is the scientific reason for this change?

• Baking soda chemically changes when added to vinegar.

• Baking soda evaporates when added to vinegar.

• Baking soda condenses when added to vinegar.

• Baking soda’s atoms are destroyed when added to vinegar.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is not a compound?

• water (H2O)

• baking soda (NaHCO3 )

• . sugar (C6H12O6 )

• calcium (Ca)

Tags

NGSS.MS-PS1-1

The formula of sugar is C₁₂H₂₂O₁₁ .Which of the following statements is true about the formula?

• Sugar contains 22 atoms of Helium.

• Sugar contains more carbon atoms than it does oxygen atoms.

• Half of sugar is made of water

• Sugar contains 43 total atoms.

Tags

NGSS.MS-PS1-1

A student was given the following chemical formula, 2CH₃CH₂OH. How many atoms are there for each of the elements?

• C=2, H=3, O=1

• C=4, H=3, O=2

• C=4, H=12, O=2

• C=2, H=6, O=1

Tags

NGSS.MS-PS1-1

How many atoms of Oxygen are present in the compound below?

Mg₃ (PO₄ )₂

Enter your answer in the box

Tags

NGSS.MS-PS1-1