Chemistry Part 2 Flashcards
During a chemical reaction, what happens to the number of atoms?
They remain the same
Chemical or Physical Reaction
Baking a cake
chemical
Chemical or Physical Reaction
Burning Wood
chemical
Chemical or Physical Reaction
Chopping Wood
physical
Chemical or Physical Reaction
Mixing baking soda and vinegar
chemical
Chemical or Physical Reaction
Making a sand castle
physical
What does volume measure?
how much space an object takes up
What measuring instrument would you use to measure volume?
a calibrated cup or a gradulated cylinder
Is this a testable question
Are plants prettier in sunlight or shade?
no
Is this a testable question
Do plants grow better in sunlight or shade?
No
Is this a testable question
Do plants grow taller in the sunlight or in the shade?
yes
Is this a testable question
Which dogs are friendlier?
no
Is this a testable question
Which metal is harder, black mica or pink feldspar?
yes
Is this a testable question
How can I make my plant grow taller?
no
How is volume measured?
Cubic units by putting the object in water and measuring the increase in water level.
How is volume measured?
Cubic units by putting the object in water and measuring the increase in water level.
The results of a testing are the independent or dependent variable?
Dependent
What the hypothesis is in testing is the independent or dependent variable?
Independent
What are controlled variables?
The variables kept the same in an experiment. .
What is a solute?
The substance being dissolved.
What is a solvent?
The part being used to dissolve a substance.
What are the two parts of a solution?
The solute and the solvent
Name some substances that are acids?
Vinegar, lemon juice
Name substances that are neutral.
Dish washing liquid. Water.
Name so substances that are bases.
Windex and Baking Soda
What has a pH level under 7?
An acid
What has a pH above 7?
A base
Substances that are neutral have what pH level?
7
What happens when an acid neutralizes a base?
A chemical reaction takes place.
What happens to the atoms during a chemical reaction?
They rearrange to produce something new.
What is used to find out the pH balance of a substance?
Litmus paper
What is sodium acetate?
It’s the salt produced when baking soda and vinegar have a chemical reaction. It is a neutral.
What is neutralizing?
It’s when an acid combines with a bases to form a neutral.
When happens during oxidation?
The element or molecule loses electrons because of oxygen.
What is a mixture?
Two or more elements that are combined.
Can mixtures be separated? Why or why not?
They can because they are caused by a physical change, not a chemical change.
Is a solution a mixture? Why or why not?
Yes, because it is made up of a solid and a liquid.
What is a compound?
They are molecules that have been chemically bonded together to become
a new substance.
