Chemistry Revision

Density

100

What is the formula for calculating density?

Density = Mass / Volume

200

What device do we use to measure the volume of an irregular shape?

Eureka Cans

300

A student measures the mass of a 8 cm3 block of brown sugar to be 32 g. What is the density of the brown sugar?

4 g/cm3

400

Calculate the density:

Mass: 8 g

Volume: 16 cm3

0.5 g/cm3

500

Calculate the density of this wood block:

Mass: 75 g

Length: 10 cm

Width: 2 cm

Height: 5 cm

AND: Will it float on water?

0.75 g/cm3 - YES IT WILL FLOAT!

Solids, Liquids, Gases

100

What is the state of matter where particles are vibrating in ordered rows?

Solid

200

What is the state of matter where the particles are far apart and moving quickly in random directions?

Gas

300

Name the TWO processes that involve an INCREASE in energy!

Melting + Evaporation

400

The name of the process where gas becomes liquid.

Condensation

500

What is the keyword to describe particles spreading in a container? (ex: Smell of cooking from the kitchen going into the living room)

Diffusion

Elements and Compounds

100

Made up of ONE type of atom and cannot be broken down into anything simpler.

Element

200

Made of 2 OR more DIFFERENT atoms chemically joined together

Compound

300

Carbon Dioxide - Element or compound?

COMPOUND

400

2 Oxygens joined together - element or compound?

ELEMENT!

500

Aluminium and Magnesium mixed together in a bottle - element or compound?

2 Elements - NOT CHEMICALLY JOINED!