Pure substances and Mixtures

Instant coffee is made by dissolving a powder in hot water. Instant coffee is a ___________________ .

• pure substance

• mixture

Baking soda is the common name for sodium bicarbonate, or NaHCO3. It can be produced through chemical reactions involving carbon dioxide and sodium hydroxide.

• pure substance

• mixture

Tags

NGSS.MS-PS1-2

Cake batter is a substance that may contain flour, eggs and sugars mixed by hand or with an electric mixer. Cake batter is a ___________________ .

• pure substance

• mixture

Chalk is a mineral found in rocks. It contains carbon, oxygen and calcium atoms. Chalk is a ___________________ .

• element

• compound

Tags

NGSS.MS-PS1-1

Nickel has the chemical symbol Ni and atomic number 28. It is a silvery-white metal and cannot be broken down physically or chemically into a more simple substance. Nickel is a ___________________ .

• element

• compound

Granite is an igneous rock that contains the minerals quartz, feldspar, mica and others. The exact composition will vary from sample to sample. Granite is a(n) _______ .

• element

• compound

• heterogeneous mixture

• homogenous mixture/solution

Tags

NGSS.MS-PS1-1

What two types of matter are pure substances?

• elements and solutions

• compounds and mixtures

• elements and compounds

• mixtures and solutions

Mixtures that have the same composition throughout are...

• heterogeneous

• homogeneous

• elements

• pure substances

Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –

• a gas at room temperature.
• made of two different elements.
• given off by green plants.

Tags

NGSS.MS-PS1-1

Elements are broadly classified as metals, nonmetals, and _________________.

• compounds

• organic

• metalloids

• Metallica