Energy and Chemical Change

E_{a is a symbol of?}

• Heat energy

• activation energy

• kinetic energy

• light energy

The minimum amount of energy that is required to activate atoms or molecules is

• kinetic energy

• light energy

• activation energy

• none of these

What instrument would you use to detect an endothermic or exothermic reaction?

• Ruler

• Thermometer

• Kalimeter

• balance

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What type of reaction is this?

• endothermic

• combustion

• hydrocarbon

• exothermic

Tags

NGSS.HS-PS1-4

What kind of reaction is shown in the image?

• endothermic

• exothermic

• combustion

Tags

NGSS.HS-PS1-4

True or false: ΔH for an endothermic reaction is a positive value.

• True

• False

Tags

NGSS.HS-PS1-4

Way to show overall change in energy?

• table

• line graph

• pie chart

• energy level diagram

Tags

NGSS.MS-PS3-1

What type of reaction involves the formation of new substances?

• Physical reaction

• Chemical reaction

• Biological reaction

• Mechanical reaction

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

What is the main product of photosynthesis?

• Water

• Oxygen

• Carbon dioxide

• Glucose

Tags

NGSS.MS-LS1-6

Table 1 shows the results of an experiment to study the reactivity of metal P, Q and R towards oxygen. Which of the following shows the reactivity of the metals towards oxygen in ascending order correctly?

• P, Q, R

• P, R, Q

• R, P, Q

• Q, R, P

Tags

NGSS.MS-PS1-2