Matter

A chemical property is a characteristic of matter that can be observed as the matter changes to a different type of matter. Which is NOT an example of a chemical property?

• flammability

• density

• reactivity to oxygen

• reactivity to acid

A physical property is a characteristic of matter that can be observed that does NOT change the matter. Which is NOT an example of a physical property?

• change of state

• density

• conductivity

• formation of rust

Density defined as how close the particles are in a substance. You can find out the density of a substance by dividing mass by volume and density is NOT size dependent. Which statement is also TRUE regarding density?

• Every substance has a unique density so it is one of the key physical property used to identify an unknown substance.

• Substances do NOT have a unique density so it is NOT a significant physical property used to identify an unknown substance.

Which substance has the highest density?

• vegetable oil

• water

• dish soap

• corn syrup

Tags

NGSS.MS-PS1-2

Does the the equation pictured above model Law of Conservation of Matter?

• YES because there are the same number of atoms before chemical reaction and same number of atoms after the chemical reaction took place!

• NO because there are not the same number of atoms before chemical reaction and same number of atoms after the chemical reaction took place!

Tags

NGSS.MS-PS1-5

A chemical reaction between baking soda & vinegar was done in these two systems. The mass of beaker, baking soda & vinegar was 45 grams before and 38 grams after the chemical reaction took place. Which system was used in this experiment?

• System A because the gas created left the container and is the surrounding air.

• System B because the gas created in the chemical reaction has less mass so of course the mass would be less.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation is explained as the total amount of mass is equal to the volume of both initial substances in a chemical reaction.

• TRUE

• FALSE

Tags

NGSS.MS-PS1-5

The Law of Conservation is explained as the total mass before a chemical reaction is the same as the total mass after the chemical reaction.

• FALSE

• TRUE

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What does sunlight energy do in the process of photosynthesis?

• It creates energy for the leaf and can no longer be used.

• It is used to break the bonds in water & carbon dioxide molecules.

• It is used to break the bonds in glucose & oxygen.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Every substance has unique properties. When substances combine and a chemical reaction takes place which statement is correct?

• The substances that are produced will always be the same.

• The substances that are produced will always be different.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5