Unit 1 Review

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

• useful to human beings

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NGSS.MS-PS1-1

What is the chemical symbol for Hydrogen in this picture?

• 1

• 1.008

• H

• Hydrogen

Which of the following in an element?

• Salt (NaCl)

• Water (H₂0)

• Sugar (C₆H₁₂0₆)

• Helium (He)

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NGSS.MS-PS1-1

Which of the following is a compound?

• Salt (NaCl)

• Iron (Fe)

• Calcium (Ca)

• Helium (He)

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NGSS.MS-PS1-1

Which of the following elements is the most abundant in the hydrosphere?

• Nitrogen

• Aluminum

• Oxygen

• Hydrogen

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NGSS.MS-ESS2-4

Which of the following is not an element in the lithosphere?

• Iron (Fe)

• Aluminum (Al)

• Oxygen (O)

• Nitrogen (N)

Tags

NGSS.MS-ESS2-1

NGSS.MS-PS1-1

Which of these statements is TRUE about elements?

• Elements are composed of two or more elements chemically combined to create a new substance.

• Elements can be broken down into simpler substances

• Elements are located on the periodic table

• Elements are represented by a chemical formula of two or more capital letters.

Which of these is TRUE about compounds?

• Compounds are composed of two or more elements chemically combined to create a new substance.

• Compounds are located on the periodic table

• Compounds cannot be broken down into simpler substances

• Compounds are represented by a chemical symbol of a capital letter and sometimes followed by a lowercase letter.

Tags

NGSS.MS-PS1-1

All of these properties describe nonmetals EXCEPT:

• Dull

• Not malleable

• Not ductile

• Good conductor of heat and electricity

Luster is a physical property of matter that describes its ability to:

• Transfer heat and electrical energy

• Reflect light

• Be hammered and rolled into thin sheets

• Exist in nature as a solid, liquid or gas