Chemical Reactions

A chemical reaction is a

• physical change

• a process where new substances are formed from reactants

• a complex series of events caused by fire (combustion)

• a single reactant

reactants are

• the results of a chemical reaction

• things that combine to create new products

• chemical reactions

• the same as products

Products have

• different properties than the reactants they come from

• the same properties as the reactants they come from

When baking soda and vinegar are mixed, water is a

• product

• reactant

Which of the following are conditions that can cause chemical reactions? Select any that apply.

• heating

• cooling

• mixing

• waiting

To observe if a chemical reaction has taken place, you can

• test whether the name of the substance has changed

• ask a scientist

• ask google

• test the density of the substance

Which of the following are properties of a material that could be tested? Select all that apply.

• Visual Observation

• how many atoms there are

• density

• melting/flash point

Willow trees have lots of

• aspirin

• salicin

• salicylic acid

• Felix Hoffmann

The scientific process starts with

• a question or inquiry

• research

• a hypothesis

• an experiment

The purpose of an experiment is to

• turn a reactant into a product

• prove you are right

• test a hypothesis