Changes & Mixtures Test Review

What will happen if you have a mixture of iron and aluminum and you try to seperate it with a magnet?

• The aluminum would be attracted to the magnet.
• The iron would be attracted to the magnet.
• Both metals would be attracted to the magnet and you would not separate them.
• Neither would be attracted to the magnet and would not get seperated.

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties
• liquid properties
• real properties

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

If water has a boiling point of 100^o C (212^o F), what state would it be in at room temperature?

• gas
• liquid
• plasma
• Bose-Einstein condensate

What characteristic defines all chemical changes?

• There is a change of state.
• Electricity is produced.
• A new material is formed.
• Bubbles are produced. 

Is being able to melt physical or chemical

• physical
• chemical
• ducktile
• maluable

Is making a cake physical or chemical

• physical
• chemical
• ducktile
• maluable

Is burning wood a chemical or physical change?

• chemical
• physical

Is hammering wood together to build a house a chemical or physical change?

• chemical
• physical

Is melting butter for popcorn a chemical or physical change?

• chemical
• physical