The Ph Scale
What numbers does the Ph scale range from?
0-14
What element is vital for all life on Earth?
Water
What is biology?
The study of life on Earth.
What is the scientific name for water?
H2o
What is the Indepdent varible?
The varible that is changed by the experimenter.
What numbers on the Ph scale are considered acids?
0-6
What is water's Ph level?
7
What is a hypothesis?
A hypothesis is an idea formed by a scientist that has valid eveidence, and is testable.
Are all acids dangerous?
No, some acids we use in our everyday life.
What is the dependent varible?
The varible that depends upon the changes made to the indepent varible.
What number on the Ph scale is considered a nutral?
7
True
What is scientific method?
The process of objectively establishing facts through testing and experimentation
True or False: All bases are safe for humans to touch/use.
False: Some bases are very dangerous for humans, and can be very unsafe.
Why do we have a control group?
To have something to compare the results too.
What numbers on the Ph scale are considered bases?
8-14
Why is water important in chemistry?
Water is a nutral, and acts as a base between acids and bases.
What is a statement that cannot change under certain natural conditions?
Scientific Law
What color are acids?
Red, orange, and yellow
A study is done to test a new sunscreen. Five people are given the new formula, and five other people are given the old one. All ten people lay out in the sun for 10min. What is the dependent and independent varible?
Independent: The new sunscreen.
Dependent: The results of the new sunscreen/if it works.
What colors are the strongest acids and bases on the Ph scale?
Why is water needed for cells?
Water helps cells hold their shape.
Why is biology important?
Biology helps us understand all life on Earth, and how that life interacts with each other.
What color are bases?
A new dog food is developed to help overweight dogs lose weight. Two overweight dogs are given the new food, and two other overweight dogs are given regular dog food. All four dogs are fed the same amounts of both types of food for two weeks. What is the independent and dependent varible? What is the control group?
Independent: The new weight lose food.
Dependent: The amount of weight lost by the dogs on the new food.
Control: The two week period they are being fed, and the equal amount of food.