IPS Chemical Interactions Chapter 2 Section 1

Question 1

chemical property

Answer 1

a characteristic of a substance that describes its ability to change into other substances

Question 2

chemical reaction

Answer 2

a change in matter that produces one or more new substances (aka chemical change)

Question 3

chemistry

Answer 3

the study of matter and how it changes

Question 4

endothermic reaction

Answer 4

a reaction in which energy is absorbed

Question 5

exothermic reaction

Answer 5

a reaction that releases energy in the form of heat

Question 6

How are endothermic and exothermic reactions different?

Answer 6

In an endothermic reaction energy is absorbed, but in an exothermic reaction energy is released.

Question 7

How are endothermic and exothermic reactions the same?

Answer 7

They both result in a change in temperature.

Question 8

In terms of chemical bonds and electrons, what kinds of changes occur between atoms when substances undergo chemical reactions?

Answer 8

Bonds are broken and new bonds are formed when atoms share or transfer electrons.

Question 9

List five kinds of evidence you can use to determine if a chemical reaction has occurred?

Answer 9

change in color, formation of a precipitate, gas produced from solids or liquid, increase in temperature, decrease in temperature

Question 10

matter

Answer 10

anything that has mass and takes up space

Question 11

physical change

Answer 11

any change that alters the form or appearance of a substance but doesn’t change it into another substance

Question 12

physical property

Answer 12

a characteristic of a substance that can be observed without changing the substance into another
substance.

Question 13

precipitate

Answer 13

a solid that forms from solution during a chemical reaction

Question 14

three types of energy

Answer 14

heat, light, electricity

Question 15

What are the two main types of observable changes?

Answer 15

changes in properties and changes in energy

Question 16

What is a common indication that energy was released or absorbed?

Answer 16

change in temperature

Question 17

What is the difference between the physical properties and the chemical properties of a substance?

Answer 17

A physical property is a characteristic of a substance that can be observed WITHOUT CHANGING the substance into another substance. A chemical property of a substance can only be observed by CHANGING it to another substance.

Question 18

When do chemical changes occur?

Answer 18

when chemical bonds are broken and new bonds form