2024 Chemical Science Test Part 1

Match the following:

• molecule

• smallest unit of matter

• atom

• 2 or more different atoms bonded together

• compound

• a substance made of one type of atom

• element

• 2 or more atoms of ANY type bonded together

Match the following

• combustibility

• How easily something REACTS with another substance

• chemical property

• How easily something catches on FIRE

• flammability

• How easily something BURNS at higher temperatures

• reactivity

• how easily a substance can HARM living organisms

• toxicity

• PROPERTIES that can only be seen with some type of CHEMICAL REACTION.

Using the image, which item has the STRONGEST base?

• vinegar (ph 3)

• milk (ph 6)

• drain cleaner (ph 14)

 Choose the pH that indicates the WEAKEST ACID:

• Ph 3

• Ph 6

• Ph 10

 PURE WATER (pH = 7) is which type of liquid?

• acid

• base

• neutral

Look at the image. What is it?

• Element

• Compound

• Mixture

Look at the image. What is it?

• Element

• Compound

• Mixture

Look at the image. What is it?

• element

• compound

• mixture

Match the following

• R =  Reactant

• matter is not created or destroyed, it is just REARRANGED

• LCM = Law of Conservation of Matter

• reactions feel HOT because heat is released as the atoms rearrange

• X  = Exothermic

• the substances that are combined BEFORE a chemical reaction

Match the following

• chemical reaction

• reactions feel COLD because heat is absorbed as the atoms rearrange

• endothermic

• substances REACT to form new substances that are chemically different than the original substances

• product

• the new substances PRODUCED by a chemical reaction