States of Matter/Atoms
Matter/Density
Conservation of Matter
Flammability
Chemical Reactions
100
What are the 3 states of matter?
solid, liquid, gas
100
The Law of Conservation of Matter states that
matter cannot be created or destroyed.What was there before should be there afterwards
100
What is a reactant?
Reactants are the starting materials in a chemical reaction,
100
What is it called when it easily and quickly something can catch on fire and burn
flammability
100
Define a chemical reaction
Atoms rearrange to create a new substance
200
What is everything in the universe that has mass and takes up space?
matter
200
Is dissolving sugar in water a physical change or a chemical change? Answer and explain.
Physical. There is no new substance the particles just get mixed around.
200
State the law of conservation of matter in one sentence
Matter is neither created nor destroyed during a chemical reaction; total atoms remain the same.
200
what is it called when it extinguishes (turns off) a fire
non- flammable
200
Name signs (evidence) of a chemical reaction?
Bubbling, smoke, a smell, a solid appears, a color change.
300
What are the basic building blocks of life and the universe?
atoms
300
_____________Density = Will sink more
higher
300
How many grams of Reactant does a scientist need, in order to make 107 grams of product?
107
300
what change is it when "a change in how matter looks without making a new substance"
physical or chemical?
physical change?
300
Two substances are mixed and an odor develops this indicates a .............. reactions
chemical
400
Burning a candle produces light and ash. Is this a physical or chemical change? Explain which new substances form
Burning candle = chemical change; new substances like carbon dioxide and water vapor (and solid soot) form.
400
Is dissolving a chemical reaction?
Not necessarily. It depends if there are signs of a chemical reaction and if the mixture is new substance cannot be separated and has new properties.
400
Wanda made 21 grams of carbon dioxide (CO2) by mixing baking soda and vinegar. If she used 11 grams of baking soda how many grams of vinegar did she need?
10 grams
400
what is it called "when different types of substances react and turn into a new substance"?
physical and chemical change?
chemical change
400
NaHCO3, how many H do we have?
1
500
What is a group the building blocks of a substance?
molecules
500
_________Density = Will Float more
lower
500
True or false: Matter must have weight, but doesn’t have to take up space.
false
500
CO₂, how many Os do we have?
2
500
provide a real life example of a chemical change?
burning paper, bath bomb and water, baking soda and vinegar