State Symbols

What state symbol do we use when something is dissolved in water?

• (l)

• (aq)

• (s)

• (g)

Which correctly shows the molecule we breathe out?

• CO2(l)

• CO2(aq)

• CO2(g)

• CO2(s)

What do we add to chemical equations to show what STATE the products and reactants are in?

• State symbols

• Numbers

• Arrows

• Pictures

When water MELTS, it changes state from SOLID (s) to...

What is a precipitate?

• A solid formed in a liquid

• A liquid

• A gas

• A gas formed in a liquid

What happens to salt when it is stirred in hot water?

• it solidifies

• it disrupts

• it melts

• it dissolves

Evidence of a chemical reactions is anything that shows - 

• a new substance has formed
• a solid dissolved in a liquid
• interaction between 2 gases
• a change in the state of matter

One of the signs of a chemical reaction taking place is:

• Bubbles are produced 
• Reactants are not combining
• Products are not forming
• Color is not changing

Which of the following describes a precipitate?

• a liquid forms when a block of metal is heated
• a solid forms when one liquid is poured into another
• a gas forms when a solid is placed in a liquid
• bubbles form when an acid is poured on a rock

Which of the following is an example that includes evidence of a chemical reaction?

• A sample of zinc is placed in water and it settles to the bottom
• A solid block of ice is heated and it completely melts into a liquid. 
• Sugar that is burned gives off an odor and turns brown and then black.
• A tomato is placed into a blender and chopped up into smaller pieces.