Sc 8 P 8 9

Sodium hydroxide, a compound commonly found in drain cleaners, has a pH of 13.  Which of these phrases describes sodium hydroxide?

• Highly basic

• Slightly basic

• Slightly acidic

• Highly acidic

Students classify various samples into two groups as shown in the chart.  Which describes how these samples were classified?

• Group A is elements; Group B is mixtures

• Group A is mixtures; Group B is solutions

• Group A is pure substances; Group B is mixtures

• Group A is compounds; Group B is mixtures

C₆H₁₂O₆ is the chemical formula for glucose, a type of sugar. Which statement is true about glucose?

• Glucose is a compound because it is made of more than one element

• Glucose is a compound because it is made of protons, neutrons, and electrons

• Glucose is an element because it can be separated into smaller components

• Glucose is an element because it is made up of only one type of atom

Tags

NGSS.MS-PS1-1

Explain the difference between a pure substance and a mixture.

• A pure substance is made of only one type of matter and a mixture has many.

• A pure substance can be physically separated and a mixture cannot.

• A pure substance consists of elements and a mixture consists of compounds.

• A pure subtance cannot be separated physically but a mixture can.

When an acid and a base cancel each other out, they form a ...

• pH solution

• stronger acid

• a salt

• a mixture

Which of these common substances is a homogeneous mixture?

• Maple syrup

• Pure water

• Table salt

• Liquid iron

Which of these substances is a compound?

• Potassium

• Helium

• Trail mix

• Methane

Tags

NGSS.MS-PS1-1

Which would you claim is the best set of tools to use for separating a mixture of water, sugar, and pebbles?

• a filter and a magnet

• a filter and a hot plate

• a magnet and a hot plate

• a setting tank and a filter

The model shows some properties of several materials.  Which of the following is the most acidic?

• Soap

• Floor cleaner

• Orange juice

• Acid rain

Tags

NGSS.MS-PS1-2

What is the term for a substance that is made up of only one type of atom?

• Pure Substance

• Element

• Compound

• Mixture