Benchmark Review

A substance contains two different components joined by physical means. Which best describes the substance?

• element

• compound

• mixture

• water

Which represents a compound?

• air

• iron

• soil

• water

Tags

NGSS.MS-PS1-1

Which substance is composed of only one type of atom?

• element

• mixture

• solution

• molecule

An element is identified by

• its number of protons.

• the atomic mass.

• the type of charge.

• its number of isotopes.

The element sodium appears like this in the periodic table. Which is its chemical symbol?

• 11

• Na

• sodium

• 22.990

The chemical formula for baking soda is NaHCO₃. How many different elements make up baking soda?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

What are the columns of the periodic table called?

• periods

• rows

• tables

• groups or families

As part of a study, a scientist observed a number of different molecular changes in matter. Which of the following observations provides evidence of a physical change?

• using heat to burn a log in a fireplace

• using light to produce sugar in plants

• a cake that was baked from many ingredients

• a bottle that was broken into many small pieces

Which task in the kitchen is an example of a physical change?

• frying an egg

• baking a cake

• toasting bread

• melting butter

3P + 5O₂ ----> P₄10

• Balanced Equation

• Unbalanced Equation

Tags

NGSS.MS-PS1-5