chemical vs. physical reactions
nail rusting
chemical
Pure substances made of more than one element are called ________?
What is a compound
A substance that dissolves in another substance is said to be ________? (soluble or insoluble?)
What is soluble
the variable that the scientist changes to see how it affects something else
independent variable
the R in CER stands for....
Reasoning
a solid precipitate is formed
chemical reaction
HCl is a
compound
what is a solute
example?
something that is being dissolved
-salt, sugar
the variable being measured or affected
dependent variable
what goes on the top of a graph
the title
something i can do increase the rate of a chemical reaction
-breaking solute into smaller particle sizes
- agitating/stirring
-increasing temperature
The elements sulfur and oxygen combine to form a substance called sulfur dioxide (SO2). Sulfur Dioxide is a
a compound
what is a solvent
the liquid that is doing the dissolving
what variable goes on the x axis
independent variable
two students want to accelerate the dissolution of baking soda. what should they do?
-use hot water
-agitate the water by stirring it
evidence of a chemical reaction
-color change
- change of smell
-bubbles
-rusting
the chemical symbol N is for
Nitrogen
able to dissolve
soluble
what variable goes on the Y axis
dependent variable
how many atoms of carbon are on C12H22O11
12
evidence of a chemical reaction
(think about milk and vinegar lab)
a solid precipitate is formed
a compound contains_____
two or more atoms from different elements chemically joined together
contains a solute and a solvent
solution
What color of light helps plant grow the tallest
independent variable?
color of light
choose for an easy 500 points
everyone on your team should dance for 10 seconds. if you don't, you loose 500 points