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!

• rusting of iron

• mixing ingredients to make lemonade

• baking ingredients to make a cake

• mixing salt and water to make a solution

• fermenting grapes to make wine

• crumpling a piece of paper

• evaporating water to get steam

• burning wood to produce ash

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

• photosynthesis in plants

• a change that cannot be reversed

• melting ice cubes to get water

• digesting food in the stomach

• a change that can be reversed easily

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

• cutting a piece of paper into smaller pieces

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 nucleotides

• proteins

• polymers made of simple sugars

• nucleic acids

• polymers made of ammino acids

• carbohydrates

Man-made polymers are called...

Most synthetic polymers are made from petroleum oil.

• true

• false

Plastics are synthetic polymers.

• true

• false