6.5, 6.8A & 6.9C Unit Assessment Retake

The formula for one molecule of glucose is: C₆H₁₂O₆. How many different elements make-up one molecule of glucose?

• 24

• 12

• 3

• No way to know

Tags

NGSS.MS-PS1-1

1. Reactant A and reactant B undergo a chemical reaction to form product C.

What type of substance is product C?

• An atom

• A mixture

• An element

• A compound

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

When writing a symbol for an element, which rule is important to remember?

• There are always two letters.

• The first letter is always capitalized.

• All letters are always capitalized.

• There is always a period.

Sucrose is another name for table sugar. Sucrose is a compound made from the elements carbon, hydrogen, and oxygen. Which statement best describes the properties of sucrose?

• They are exactly like the properties of carbon.

• They are exactly like the properties of oxygen.

• They are exactly like the properties of hydrogen.

• They are different from the properties of the elements that make up sucrose.

Tags

NGSS.MS-PS1-1

Which of the following is a way in which elements and compounds are similar?

• Elements and compounds are both pure substances.

• Elements and compounds are both listed on the periodic table.

• Elements and compounds are both made up of different kinds of atoms.

• Elements and compounds can both be broken down by physical changes

A water molecule is made up of one oxygen and two hydrogen atoms. Why is water considered a pure substance?

• Water can be broken down by physical means.

• Water can be combined with other substances by physical means.

• Each water molecule is identical.

• Water molecules are made up of different types of atoms

Tags

NGSS.MS-PS1-1

The diagram below shows a magnet near a pile of particles of iron and sulfur. The magnet attracts the iron, separating it from the mixture. Based on the diagram, which statement is true?

• The parts of a mixture keep their own properties

• The elements in a compound keep their own properties

• The properties of a mixture are different from the properties of its parts

• The properties of a compound are different from the properties of its elements.

Tags

NGSS.MS-PS1-2

Which of the following is a way in which elements and compounds are different?

• Elements are pure substances, but compounds are not

• Compounds can be broken down by physical changes, but elements cannot.

• Elements are made of identical atoms, whereas compounds are made of identical groups of elements or molecules.

• A compound contains many different kinds of elements, whereas an element contains many different kinds of atoms.

Which of the following table correctly identifies the elements and compounds?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Why is carbon considered to be an element, but carbon dioxide is classified as a compound?

• Carbon dioxide is a gas

• Carbon dioxide has two different elements.

• Carbon is found in living matter

• People exhale carbon dioxide.

Tags

NGSS.MS-PS1-1