First Semester Review!

Draw a lewis dot structure for an Oxygen atom

Diffusion is the process in which

• Particles all move into one small space to condense

• Particles move across a space to even out

• particles stop moving completely

• none of the options are correct

when we increase the temperature of a system ( aka the room or a cup of tea) diffusion occurs...

• slower

• the same

• quicker

what two things is causing sea levels to rise

• the increase in melting sea ice and overall increase in climate temperature

• the increase melting sea ice and the overall decrease of climate temperatures

• the increase melting of land ice and the overall decrease of climate temperatures

• the increase melting of land ice and the overall increase of climate temperatures

density is

• mass x volume

• density x volume

• mass / volume

• volume / mass

the best explanation of density would be...

• the degree of compactness of a substance

• the amount of volume in a substance

• how much mass you have

• how much volume you have

Which of the boxes above us the most dense?

• the box to the left

• the box in the middle

• the box to the right

1. A substance has a density of 5 g/cm3.  If a piece of this substance has a volume of 30 cm3, what is its mass?

1. A substance has a density of 5 g/cm3.  If a piece of this substance has a mass of 100 g, what is its volume?

A piece of Steel (density = 7.9 g/cm3) has a mass of 100 g.  What is the volume of this piece?