Module 1

Question 1

What is Chemistry

Answer 1

the study of nature, properties, and transformation of matter

Question 2

What is matter?

Answer 2

The physical material that makes up the universe, so anything in the world has mass and occupies space

Question 3

Scientific Method

Answer 3

A systematic process of observation, hypothesis and experiment used to expand knowledge an refine a body of knowledge

Question 4

Define physical change

Answer 4

a change that does not affect the chemical properties of a substance or object.

Question 5

Define chemical change

Answer 5

a change that alters the chemical makeup of a substance - they create a new substance with properties that different than the original substance

Question 6

When sugar dissolves in water, is it chemical or physical ?

Answer 6

Physical because they both remain the same identity

Question 7

When sugar is heated into caramel, is it physical or chemical?

Answer 7

it is chemical because the sugar melts and darkens and thickens - the color and consistency changes than the original sugar.

Question 8

What is a solid?

Answer 8

has definite shape and volume

Question 9

What is a liquid?

Answer 9

has definite volume and assumes the shape of container

Question 10

What is gas?

Answer 10

Neither definite volume or shape

Question 11

Define state of matter

Answer 11

a state which a substance is - solid, iquid or gas

Question 12

Change of state means..

Answer 12

changing the state from s, l or g (whatever it converts to)

Question 13

What is a pure substance?

Answer 13

has a uniform chemical composition entirely

Question 14

What is a mixture?

Answer 14

A combination of 2 + substances that retains its chemical identity

Question 15

Homogenous mixture is?

Answer 15

A uniform mixture that has the same composition entirely

Question 16

Heterogenous mixture is?

Answer 16

A non-uniform mixture that has different compositions in different regions

Question 17

Define element

Answer 17

An element is a fundamental substance that cannot be broken down into a simplier form

Question 18

Define chemical compound

Answer 18

a pure substance that is able to be broken down into simpler substances through a chemical reaction

Question 19

What is a reactant

Answer 19

the starting substance that undergoes change

Question 20

What is a product

Answer 20

what is formed at the end of a chemical reaction

Question 21

what is mass

Answer 21

the measure of the amount of matter within an object

Question 22

what is weight

Answer 22

the measure of gravitational force of the earth or other bodies that exerts force on an object

Question 23

Energy is..

Answer 23

the capacity to do work or supply heat

Question 24

Temperature is…

Answer 24

the measure of the amount of heat energy within an object

Question 25

Conversion factor of K to Celsius and vice versa

Answer 25

K to C = C + 273.15
C to L = K - 273.15

Question 26

Conversion fact of Farenheit to Celsius and vice versa

Answer 26

1.8 x 32 F (C to F)
C / 1.8 x (f - 32f) (F to C)

Question 27

What is density?

Answer 27

the physical property that relates to the mass of an object to its volume - mass per unit of volume

Question 28

What is specific gravity

Answer 28

the density of substances divided by the density of water at the same temperature