Unit 5 Review: Chemical Reactions

What was the temperature in the flask at 4 minutes?

• 30°C

• 24°C

• 20°C

• 15°C

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

How many degrees did the temperature drop between 2 and 5 minutes?

• 30°C

• 24°C

• 20°C

• 15°C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

At what temperature did the reaction stop?

• 3°C

• 10°C

• 12°C

• 15°C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Two liquids are combined and a reaction occurs. From the reaction a solid has formed; this is called a ___________________.

• mixture

• precipitate

• atom

• molecule

Tags

NGSS.MS-PS1-2

A change in temperature can be a sign of a ____________ if the change happened with the mixing of two substances.

• a physical property

• a chemical property

• a chemical change

• a physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of the following are physical changes?

• cutting paper, lighting a match, rolling clay into a ball

• folding paper, cutting hair, gluing a piece of wood

• growing an apple, cutting an apple, biting an apple

• photosynthesis, cellular respiration, oxygenation of blood

Which of the following are chemical changes?

• cutting paper, lighting a match, rolling clay into a ball

• folding paper, cutting hair, gluing a piece of wood

• growing an apple, cutting an apple, biting an apple

• photosynthesis, cellular respiration, oxygenation of blood

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The principle stating that matter is not created or destroyed during a chemical reaction is called__________________.

• conservation of mass

• reactant

• product

• chemical equation

Tags

NGSS.MS-PS1-5

What is wrong with the reaction?

• it is not balanced

• the reactants are missing

• the products are missing

• it does not occur in nature

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

A beaker with a stopper in it would be an example of a ____________?

• open system

• closed system

• reactants

• products