Matter Review

Which of the following statements is true?

• During an exothermic reaction, bonds are formed and the temperature increases.

• If a reaction is endothermic, the temperature will increase.

• In order for an exothermic reaction to occur, atoms must be destroyed.

• During chemical reactions, bonds are never formed or broken.

What type of chemical reaction absorbs energy and requires energy for the reaction to occur?

• endothermic

• exothermic

• both

• neither

Which of the following best describes an exothermic reaction?

• absorbs energy and decreases temperature

• releases energy and decreases temperature

• abosorbs energy and decreases temperature

• releases energy and increases temerature

Whenever energy is absorbed...

• the temperature increases

• the temperature decreases

• the temperature remains the same

Which of the following statements about the mass of an object is correct?

• mass changes with location

• mass changes with altitude

• mass remains constant

• mass changes with gravity

The amount of matter in an object is known as ____.

• volume

• density

• weight

• mass

What is the density of a wood block with a volume of 40 cubic cm and a mass of 120 g?

• 30 g/cubic cm

• 3 g/cubic cm

• 4 g/cubic cm

• 306 g/cubic cm

Density describes the relationship between...

• mass and weight

• mass and volume

• weight and volume

• velocity and volume

Which of the following can NOT be used to separate a heterogeneous mixture?

• a strainer

• a magnet

• a scoop

• a stove

When two or more substances are combined so each substance can be separated by physical means, the result is a(n) _______.

• chemical change

• compound

• element

• mixture