WS#9

Matter and its interactions

Let's review what an exothermic and endothermic reactions

Multiple Choice

In an exothermic reaction, heat is ...

• taken in or absorbed
• given out or released

Multiple Choice

In an endothermic reaction, heat is ...

• taken in or absorbed
• given out or released 

Multiple Choice

If a chemical reaction is EXOTHERMIC, the temperature would....

• Stay the same
• Increase
• Decrease

Multiple Choice

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

• It is an exothermic reaction
• It is an endothermic reaction
• It is made of ice
• It is dissolving your mouth

Multiple Choice

Alka-seltzer is made of citric acid and baking soda. when added in water, the cup would feel cold. This reaction is an example of a 

• Endothermic reaction
• Exothermic reaction
• Dissolving a salt
• physical change 

Multiple Choice

What is a type of mixture in which different parts can easily be seen (Ex. Vegetable soup)?

• Heterogeneous mixture

• Homogeneous mixture

• Solution

• Colloid

Multiple Choice

What is a well-mixed mixture containing a solvent and at least one solute that has the same properties throughout (Ex. Sugar water)?

• Heterogeneous mixture

• Colloid

• Suspension

• Solution

Multiple Choice

What is a mixture in which particles can be seen seen and settle out over time (Ex. Muddy water)?

• Solution

• Suspension

• Colloid

• Element

Multiple Choice

What is a mixture containing small, undissolved particles that do not settle out over time (Ex. Fog)?

• Solution

• Suspension

• Colloid

• Compound

Multiple Choice

Chalk (calcium carbonate) is insoluble in water (can't dissolve in water), it will suspend in water but will settle down afterward. this will create a

• colloid

• solution

• suspension

Multiple Choice

Chalk can't dissolve in water because it is

• a polar molecule

• a non polar molecule

Multiple Choice

In a solution of saltwater, what is the solvent?

• salt

• water

• ice

• the glass

Multiple Choice

If a substance is able to be dissolved, we say it is ______________.

• soluble

• concentration

• colloid

• molarity

Multiple Choice

The chemical property of water that allows it to dissolve substances with positive and negative charges.

• Solubility
• Polarity
• Surface Tension
• Evaporation

Multiple Choice

This diagram shows

• insolubility in water

• dissolving in water

• saturation in water

• a chemical reaction

Multiple Choice

This picture represents: 

• Element
• Compound
• Mixture of Elements
• Mixture of Compounds

Multiple Choice

This picture represents which of the following?

• element
• compound
• mixture

Multiple Choice

If you change a substance into a new substance...

• Partial Change
• Physical Change
• Chemical Change
• Freezing

Multiple Choice

Changing the phase, size or shape of something....

• Chemical change
• Physical Change
• Suspension
• Colloid