Chemical Reactions

How many Carbons are present on the reactant side?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

When a scientist mixed two chemicals, an exothermic reaction takes place. Which of the following would be proof that the reaction was exothermic?

• a change of color
• a change of state
• a temperature decrease
• a temperature increase

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What types of reactions absorb and release heat?

• acidic and basic
• endothermic and exothermic
• endothermic and heat transfusion
• covalent and ionic

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.

• reactants
• products
• neutrals
• energizers

A change in the shape of an object is an example of _________________.

• a chemical change
• energy
• an endothermic change
• a physical change

What type of change occurs when a new substance is formed that has different properties from the original substances?

• chemical change
• nuclear change
• physical change
• mutation

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a physical change?

• souring milk
• mixing baking soda and vinegar
• rusting metal
• mixing oil and vinegar

How do chemical reactions turn substances into new substances?

• with burning acid
• the molecules mix together and create new substances
• the atoms break apart and combine back together in new ways
• the ionic compounds mix in water to form solutions

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

a substance formed when two or more elements are chemically bonded together

• Element Soup
• Pure Element
• Ion
• Compound

Tags

NGSS.MS-PS1-1

the symbolic representation of a chemical reaction

• Long Hand
• Short Hand
• Electron Configuration
• Chemical Equation

Tags

NGSS.MS-PS1-5