General Science Quiz 8C

Sort the ideas to tell if they describe physical or chemical changes.

Groups:

(a) That's Physical Change!

,

(b) That's Chemical Change!

• a change that can be reversed easily

• cutting a piece of paper into smaller pieces

• a change win which the atoms or molecules in a substance stay the same

• change that affects the type of molecules or atoms in a substance

• photosynthesis in plants

• baking ingredients to make a cake

• mixing salt and water to make a solution

• digesting food in the stomach

• burning wood to produce ash

• evaporating water to get steam

• melting ice cubes to get water

• fermenting grapes to make wine

• mixing ingredients to make lemonade

• rusting of iron

• a change that cannot be reversed

• crumpling a piece of paper

Chemical reactions occur whenever bonds are __ or __ between atoms and/or molecules.

In a chemical formula, the molecules that are going to react together are called...

• Products
• Catalysts
• Solvents
• Reactants

In a chemical formula, the results of the chemical reactions are called...

• catalysts
• equations
• reactants
• products

Elements and compounds that form solids with geometric sides are called...

Large molecules that are made up of many smaller chemical parts called monomers are called...

Match the type of polymer with its description.

• polymers made of simple sugars

• proteins

• polymers made of nucleotides

• carbohydrates

• polymers made of ammino acids

• nucleic acids

Man-made polymers are called...

Most synthetic polymers are made from petroleum oil.

• true

• false

Plastics are synthetic polymers.

• true

• false