UNIT 4. Types of measurements

Question 1

Length is measured in

Answer 1

meters

Question 2

Volume is measured in

Answer 2

liters

Question 3

Mass is measured in

Answer 3

grams

Question 4

Weight is measured in

Answer 4

Newtons

Question 5

Time is measured in

Answer 5

seconds

Question 6

Time is also measured in

Answer 6

hours, minutes, days, months, years

Question 7

Density is measured in

Answer 7

grams per Litre or Kg/m^3

Question 8

Temperature is measured in

Answer 8

Kelvin

Question 9

Heat is measured in

Answer 9

calories

Question 10

Formula to convert Celsius to Kelvin

Answer 10

T(k) = T cels + 273.15
T(cels) = T(k) - 273.15

Question 11

Molecules stop moving completely at:

Answer 11

K = 0
Celsius = -273.15 C
Fahrenheit = -459.67 F

Question 12

Pressure is measured in

Answer 12

N/m^2 or Pa (Pascals)

Question 13

How many sig figs:

1) 403 g
2) 4300 g
3) 0.02 g
4) 0.150 g
5) 340 g

Answer 13

1) 3
2) 2
3) 1
4) 3
5) 2

Question 14

Distance between two points:

Answer 14

Length

Question 15

Amount of space that something occupies:

Answer 15

Volume

Question 16

Amount of matter in a solid, liquid, or gas:

Answer 16

Mass

Question 17

Force exerted by a mass by a gravitational field:

Answer 17

Weight

Question 18

Period between events

Answer 18

Time

Question 19

Amount of mass per unit volume:

Answer 19

Density

Question 20

Measure of an average Kinetic energy of the atoms or molecules in a system:

Answer 20

Temperature

Question 21

Total energy of the molecular motion in a substance:

Answer 21

Heat

Question 22

Measure of the force exerted in a unit area of surface:

Answer 22

Pressure

Question 23

What is the difference between heat and temp?

Answer 23

Heat - Total energy of the molecular motion in a substance
Temp - Measure of an average Kinetic energy of the atoms or molecules in a system

Question 24

Why significant figures are important

Answer 24

For accuracy and precision