Which elements make up about 96% of all living things? 

• Carbon, Hydrogen, Oxygen, Nitrogen
• Carbon, Hydrogen, Oxygen, Phosphorus
• Carbon, Hydrogen, Helium, Oxygen
• Carbon, Hydrogen, Calcium, Oxygen 

Carbon makes really strong covalent bonds with itself & other elements because: 

• It has 6 protons
• It has a larger mass than any other element
• It has 4 valence electrons 
• It makes up almost 20% of our body weight

This organic compound is our main source of energy: 

• Nucleic Acids
• Carbohydrates
• Proteins
• Lipids 

Tags

NGSS.MS-LS1-6

Carbon makes really strong covalent bonds with itself & other elements because: 

• It has 6 protons
• It has a larger mass than any other element
• It has 4 valence electrons 
• It makes up almost 20% of our body weight

How many covalent bonds does each carbon have in the molecule shown?

• 4

• 2

• 8

• 6

How many carbon atoms are in methane?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

How many carbon atoms are in propane

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

How many hydrogen atoms are in butane

• 4
• 6
• 8
• 10

What is the general formula of an alkane

• 2n+2
• CnH2n+2
• CnH2n
• CnHn

Hydrocarbons are compounds that contain

• Carbon, only
• Carbon and Hydrogen, only
• Carbon, Oxygen, and Hydrogen, only
• Carbon, Oxygen, Hydrogen, and Nitrogen, only

Tags

NGSS.HS-LS1-6