A

Which of the following describes ?

• An ecosystem is the interaction between biotic and biotic factors.

• A community is a group of different populations in the same area.

• An organism is one living thing.

• A population is a group of the same organisms.

Is this an example of a population or community?

• Population

• Community

Tags

NGSS.MS-LS2-1

Which is the stronger acid?

• pH 1

• pH 4

• pH 8

• pH 13

Tags

NGSS.MS-PS1-2

Which substance is STRONGLY acidic?

• Lemon juice

• Black coffee

• Bleach

• Milk

A(n) ______ is a substance with a pH less than 7

• Acid

• Alkaline

• Base

• Buffer

A(n) _______ is a substance with a pH greater than 7.

• Base

• Acid

• Buffer

• Water

What is the only substance with a neutral pH of 7?

• Milk

• Orange Juice

• Water

• Blood

Which solution releases H+ in solution?

• Base

• Acid

• Buffer

• Water

This substance releases OH- into solution

• Acid

• Base

• Neutral

• Water

A solution with a pH of 3.6 would be...

• Acid

• Base

• Neutral

• Acid and Base