SCIENCE NOTES

MATTER

• Anything that has mass and takes up space
• All matter is made up of atoms

ELEMENT

• An element is a single type of atom
• Some elements are helium iron and gold

ATOM

• An atom is the smallest unit that f a chemical element
• There are around 120 known atoms

PERIODIC TABLE

• It’s a list of all the existing elements
• It categorizes them according to the properties of the atoms

MOLECULE

• A molecule s made if two or more atoms join each other
• They are usually different elements

COMPOUND

• Formed when two different atoms join together
• All compounds are molecules, but not all molecules are compounds

SUBSCRIPT

• A subscript is a number that shows how many elements are in a particle/how many particles

COEFFICIENTS

• It multiplies the number of molecules you are making
• They look like exponents but they are below the htenumber

PHOTOSYNTHESIS

• Photosynthesis is the way a plant makes food for itself

CELLULAR RESPIRATION

• All living things do cellular respiration
• It’s how plants make glucose

PRODUCTS

• It’s what comes out of an reaction
• C6h12o6 + 6o2 is a product

REACTANTS

• A reactant is what goes into a reaction
• 6h2o + 6co2 is a reactant

GLUCOSE

• Glucose is also sugar
• It’s the plants food for photosynthesis

CARBON DIOXIDE

• Carbon dioxide is a gas that plants convert into oxygen for the humans to use
• If humans have too much of it, we can get sick

OXYGEN

• Oxygen is the gas that humans need to survive