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

• pure substance

• mixture

Methane contains one atom of carbon and four atoms of hydrogen that are chemically bonded. It is a main component of natural gas. Methane is a ___________________ .

• pure substance

• mixture

Tags

NGSS.MS-PS1-1

Ammonia is a colorless gas with the formula NH3. Ammonia contains hydrogen and nitrogen and cannot be broken down physically. Ammonia 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

In the lab, Maya is using a substance that has a chemical formula and contains two different elements. Maya’s substance is a(n) _______ .

• element

• compound

• heterogeneous mixture

• homogenous mixture/solution

Tags

NGSS.MS-PS1-1

Chex mix contains pretzels, rye chips and chex cereal. It is an example of a(n)

• solution/ homogeneous mixture

• heterogeneous mixture

• element

• compound

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

Compounds are different than elements because compounds are -

• A combination of two or more elements.
• 
  B)not able to be broken down into parts
• made from the same type of atoms
  
• a pure substance, elements are not
  

Tags

NGSS.MS-PS1-1

Which of these is an element?

• Salt (NaCl)

• Water (H20)

• Oxygen (O)

• Carbon Dioxide (CO2)

This diagram represents a _____.

• pure substance that is a compound
• mixture of elements
• pure substance that is an element
• mixture of compounds

Tags

NGSS.MS-PS1-1