Grade 6 Science - Semester 1 Review

Students were given four unknown substances and asked to observe their characteristics. Their observations are shown in the table.

Which of the unknown substances is MOST likely a metal?

• 1

• 2

• 3

• 4

In a comparison of metals to nonmetals, metals tend to have

• lower melting points and greater conductivity than nonmetals.

• lower conductivity and lower density than nonmetals.

• higher density and lower melting points than nonmetals.

• greater conductivity and higher melting points than nonmetals.

The chart represents properties of ...

• Metals

• Nonmetals

• Metalloids

The chart represents properties of ...

• Metals

• Nonmetals

• Metalloids

The chart represents properties of ...

• Metals

• Nonmetals

• Metalloids

Tags

NGSS.MS-PS1-1

A student is attempting to explain the differences between elements and compounds. Which of the following statements are true for elements? Select TWO correct answers.

• Elements are pure substances.

• Elements are composed of two or more elements.

• H2O is an example of an element.

• Elements are represented by a chemical symbol.

• Elements are represented by chemical formulas.

What kind of pure substance forms when two or more different elements are chemically combined and are represented by a chemical formula?

• Element

• Compound

• Mixture

• Solution

Tags

NGSS.MS-PS1-1

To explain the difference between elements and compounds, a teacher filled clear boxes with balls. Which box best represents a sample of an element?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

Ryan is using the chemical formulas for various substances to classify them either as a compound or an element. Which of the following should be identify as a compound?

• Fe

• CO

• C

• Co

Which element, that is essential for human life, is found in large amounts in both Earth's atmosphere and oceans?

• helium

• silica

• oxygen

• calcium

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3