a substance that has a pH below 7; will increase the concentration of hydrogen ions in solution

• DIGESTION

• ACID

• MOLECULE

• PARTICLE

AN ________ IS THE SMALLEST UNIT OF AN ELEMENT THAT HAS THE PROPERTIES OF THAT ELEMENT

Tags

NGSS.MS-PS1-1

Which of the following are considered a BASE? Select all that apply.

• Soap, bleach, liquid drain cleaner

• human blood, baking soda, egg whites

• magma

a substance with a pH greater than 7; will increase the concentration of hydroxide ions in solution

• CATALYST

• ACID

• BASE

• PRODUCT

I am the substance that increases the rate of a chemical reaction by lowering the amount of energy needed for the reaction to occur, but is not changed by the reaction

• catalytic converter

• catalyst

• matter

• photosynthesis

Change of state is defined as:

• the process of changing (by heating or cooling) one form of matter into another form of matter with different characteristics

• the process of changing clothes

• the process of speeding up a chemical reaction

Tags

NGSS.MS-PS1-4

An element or compound is considered a:

• water

• chemical

• molecule

• product

Tags

NGSS.MS-PS1-1

You light a fire while you camp to keep warm and to cook. You also see a chemical change. Once the wood turns to ashes, it cannot turn back into wood. The wood has become something different. What type of change is this?

• physical change

• chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of conservation of mass states that energy

• is used up until there is no more

• energy cannot be created or destroyed

• energy doesn't transfer

• principle of science stating that matter cannot be created or destroyed in a closed system

Tags

NGSS.MS-PS1-5

_________ is the process that breaks down food into smaller substances the body can use to release energy.