Matter and Change

What is the definition of the law of conservation of matter?

• energy can only be created not destroyed

• energy can't be created or destroyed; the amount will remain the same

• energy can be both created and destroyed

• energy can be destroyed but not created

Tags

NGSS.MS-PS1-5

Flammability, rusting, and rotting food are examples of -

• physical properties

• chemical properties

• loss of matter

• increase of heat

Tags

NGSS.MS-PS1-2

A physical change is defined as -

• a change in matter that causes the bonds to break and atoms to rearrange

• a change in temperature

• a change in the shape, size, or state of matter of a substance

• a change in color or odor

Is a calcium carbonate shell melting into calcium chloride a physical change or chemical change?

• chemical

• physical

• both

• neither

Tags

NGSS.MS-PS1-2

Is boiling water chemical or physical change?

• chemical

• physical

• both

• neither

Tags

NGSS.MS-PS1-4

Which shows the following equation balanced?

Ca + O₂ -----> CaO

• 2Ca + O₂ ----> Ca₂O

• Ca + 2O₂ ----> 4CaO

• 2Ca + O₂ ----> Ca₂O₂

• 2Ca + O₂ ----> 2CaO

Tags

NGSS.MS-PS1-5

Which is NOT an example of an endothermic reaction?

• exploding fireworks

• baking a cake

• popping popcorn

• grilling chicken

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which chemical formula has 6 oxygen atoms in it?

• CaO₄

• Cu(NO₃)₂

• Na₃PO₄

• Al₂(SO₄)₃

The left side of a chemical equation is called -

• formulas

• products

• reagents

• reactants

A reaction with products warmer than the reactants is described as -

• endothermic

• exothermic

• combustion

• geothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4