Science Test

Which of the following is a physical change?

• lighter fluid burning

• eggs rotting

• iron turning white when heated

• bikes rusting

A ____ is a substance in which atoms of two or more elements are combined in a fixed proportion.

• compound

• synthetic element

• solution

• mixture

A change is the size, shape, or state of matter is a _____.

• physical change

• physical property

• chemical property

• chemical change

Which of the following is a chemical change?

• burning of a log

• crushing an aspirin tablet

• evaporation of water off a lake

• boiling water

Which of the following is a compound?

• water

• air

• blood

• brass

The Law of Conservation of Mass states that _____.

• matter can be created and destroyed but does not change forms.

• the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change

• in a chemical reaction, efforts should be made to preserve rare elements without changing them

• in a chemical reaction, the final mass of the products is always greater than the starting mass of the reactants.

A substance is _______

• always an element

• always a compound

• mixture of compounds

• either an element or a compound

A ____ is a heterogeneous mixture that never settles.

• suspension

• solution

• colloid

• compound

If using a microscope allows you to see substances in a mixture, that mixture is _____.

• heterogeneous

• homogeneous

• a solution

• microgeneous

Which of the following is a homogeneous mixture?

• salt water

• dry soap mix

• concrete

• granite