52 grams of reactant A was added to 37 grams of reactant B in a closed container. A chemical reaction occurs. What will the mass of the contents of the container be after the reaction?

• 15 grams

• 1924 grams

• 89 grams

• it is impossible to predict

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A change that begins and ends with the same type of matter.

• physical change

• chemical change

• nuclear decay

• energy transformation

Tags

NGSS.MS-PS1-4

A change that results in a new substance being formed.

• physical change

• chemical change

• energy transformation

• change of state

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Substances include:

• mixtures

• elements

• compounds

• energy

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

During a physical change

• matter is created

• matter is destroyed

• mass is conserved

Tags

NGSS.MS-PS1-4

During a chemical change

• matter is created

• matter is destroyed

• mass is conserved

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

During a chemical change

• substances freeze or melt

• substances mix together

• atoms are rearranged into new substances

• energy is always released

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Organize these options into the right categories

Groups:

(a) Chemical Change

,

(b) Physical Change

• metal expands

• food spoils

• glass breaks

• cloth tears

• paper decomposes

• rubber stretches

• wood burns

• wood splits

• ice melts

• water evaporates

• iron rusts

• metal corrodes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

NGSS.MS-PS3-4

Evidence of a chemical change.​ (a)   ​ ​ (b)   ​ (c)   ​ (d)   ​ (e)  

• change in color
• change in smell
• change in temperature
• change in texture
• change in size
• change in shape
• change in volume
• change in state
• formation of bubbles
• formation of solid

Tags

NGSS.MS-PS1-2

Scientist who discovered that mass is conserved during a chemical change:

• Charles Darwin

• Antoine Lavoisier

• Albert Einstein

• Sir Isaac Newton

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5