8 Topic 1 Summative

Which of the following is a chemical change?

• folding a paper in half
• cutting your hair
• ice melting
• a log burning

A measure of the mass of a material given a volume

• density
• weight
• matter
• power

The amount of space matter takes up

• density
• volume
• weight
• gravity

Weight is a flawed measure of mass because

• it is not used in other countries
• tends to fluctuate
• it is affected by the force of gravity
• is influenced by temperature

How does thermal energy flow?

• from colder to warmer materials
• from warmer to colder materials
• in the geosphere
• it does not flow

The law of conservation of mass states that

• matter is neither created nor destroyed
• the number of molecules before and after a chemical reaction changes
• mass is lost during a low energy reaction
• mass is constant

Gallium melting into its liquid form (at 30C) is an example of a

• chemical property
• thermal energy flow
• physical property
• element

A measure of the force of gravity on an object

• power
• weight
• volume
• mass

Basic unit from which all matter is made

• atom
• molecule
• cell
• compound

What is an observable characteristic that show chemical reaction has occurred