Real-Life Examples of Elements, Compounds, and Mixtures
Elements:
Hydrogen (H)
This is the most common element in the universe. It makes up about 75% of everything around us.
Oxygen (O)
Oxygen is really important for living things. It makes up about 21% of the air we breathe on Earth.
Compounds:
Water (H₂O)
Water is essential for life and covers about 71% of our planet. It is made of two hydrogen atoms and one oxygen atom.
Carbon Dioxide (CO₂)
This compound has one carbon atom and two oxygen atoms. It's important for keeping plants alive through a process called photosynthesis. We find a small amount of it in the air, about 0.04%.
Mixtures:
Air
Air is a mixture that mainly contains nitrogen (78%) and oxygen (21%). It also has tiny amounts of other gases, like argon and carbon dioxide.
Saltwater
Saltwater is another mixture. It's made of water and salt mixed together. On average, seawater has about 3.5% salt in it.
In short, elements are pure things like hydrogen, compounds are combinations of elements like water, and mixtures are combinations of different substances, like air and saltwater.
Real-Life Examples of Elements, Compounds, and Mixtures
Elements:
Hydrogen (H)
This is the most common element in the universe. It makes up about 75% of everything around us.
Oxygen (O)
Oxygen is really important for living things. It makes up about 21% of the air we breathe on Earth.
Compounds:
Water (H₂O)
Water is essential for life and covers about 71% of our planet. It is made of two hydrogen atoms and one oxygen atom.
Carbon Dioxide (CO₂)
This compound has one carbon atom and two oxygen atoms. It's important for keeping plants alive through a process called photosynthesis. We find a small amount of it in the air, about 0.04%.
Mixtures:
Air
Air is a mixture that mainly contains nitrogen (78%) and oxygen (21%). It also has tiny amounts of other gases, like argon and carbon dioxide.
Saltwater
Saltwater is another mixture. It's made of water and salt mixed together. On average, seawater has about 3.5% salt in it.
In short, elements are pure things like hydrogen, compounds are combinations of elements like water, and mixtures are combinations of different substances, like air and saltwater.