Chemical Reactions

In a ___________change, a substance changes into a different substance.

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which factors affect the rate of a reaction?

• Temperature

• Concentration

• Surface Area

• Catalyst

• All of the Above

Why does a higher concentration increase the rate of reaction?

• It increases the amount of reactants

• It lowers the activation energy

• It increases the energy of particle collisions

• It increases the frequency of particle collisions

Why does a higher temperature increase the rate of a reaction?

• It increases both the frequency and energy of particle collisions

• It only increases the frequency of particle collisions

• It only increases the energy of particle collisions

• It reduces the activation energy of the reaction

What is the rate of reaction?

• How fast a reaction is 
• How big a reaction is
• How loud a reaction is
• How much gas a reaction produces

Tags

NGSS.HS-PS1-5

Grinding a effervescent tablet into powder increases the rate of reaction due to increased.....

• Concentration

• Surface Area

• Temperature

• Reactants

In an exothermic reaction, heat is ...

• Taken In

• Given Out

The ______________is required to break the bonds of the reactants.

• Carbonic Energy

• Activation Energy

• Plutonic Energy

• Energi Gaib

The minimum amount of energy needed for colliding particles to react is called.......

• Chemical Energy

• Kinetic Energy

• Activation Energy

• Potential Energy

A chemical reaction in which energy is absorbed is ______________.

• an endothermic reaction

• an exothermic reaction

• a single replacement reaction

• a double replacement reaction

Tags

NGSS.MS-PS1-4