Science Flashcards
What are 4 properties of organizing elements
Name, symbol, atomic number, and there metallic or non metallic character
Atom
Smallest particle of a element
Molecule
The smallest particle of a substance that can be found in nature
Element
A substance made up of one atom
4 examples of elements
Helium,hydrogen,iron, and copper
Compound
Something that consists of 2 or more atoms
Examples of molecules
Carbon dioxide,water,oxygen,and sugar
Examples of compounds
Carbon dioxide,water, salt, and vinegar
All substances are made up of
Atoms
FBr3
Molecule and compound
Si4
Atom and element
Reactant
A substance that takes part in and undergoes change during reaction
Product
The substance that result in recombination of atoms
What does a periodic tabled do?
It arranges the atomic number of elements with a similar atomic structure
What does the arrow in a chemical reaction mean?
It means to yield or produce
Rules to identify a chemical reaction equation
- describes chemical reaction
- pure substances change to other pure substances
- The reactants and products are different
Examples of organisms that use photosynthesis
Plants, algae, some bacteria and protists
Goal production of photosynthesis is
Carbon dioxide+water -> carbohydrate+ oxygen
What are the products of photosynthesis?
Oxygen and glucose
What can happen to the goal product of photosynthesis?
- used immediately
- to store
- provide food for other organisms
What is engineering?
A designed process that involves critical thinking. Constantly evaluating and revisiting ideas.
The engineer design process
Problem, constraints, prototype, final approval
