Chapter 4

Question 1

a device that measures air pressure

Answer 1

barometer

Question 2

an ionize gas

Answer 2

plasma

Question 3

each is composed of two or more atoms

Answer 3

molecule

Question 4

the relative presure between two places

Answer 4

gauge pressure

Question 5

a combination of different elements or compounds

Answer 5

mixture

Question 6

the upward force exerted by a fluid on anything immersed in it

Answer 6

buoyant force

Question 7

the smallest unit of a chemical element

Answer 7

atom

Question 8

the mass density of a substance divided by the mass density of water

Answer 8

specific gravity

Question 9

particle that orbits the nucleus in an atom

Answer 9

electron

Question 10

a unit of measure for pressure

Answer 10

atmosphere

Question 11

the pressure exerted by a gas is the result of

Answer 11

molecular collisions

Question 12

a device that measures absolute air pressure is called a

Answer 12

barometer

Question 13

the difference between the pressure inside a tire an outside a tire is called the

Answer 13

gauge pressure

Question 14

what are the units of pressure

Answer 14

atmosphere, psi, N/m, mmHg, pascal

Question 15

normal atmospheric pressure is

Answer 15

14.7 psi, 760 mmHg, 101,000 pascals

Question 16

if the same sized force is made to act over a smaller area the pressue is

Answer 16

increased

Question 17

a plasma state of matter is

Answer 17

an ionized gas

Question 18

the upwar force exerted by a fluid on an object immersed in it is called

Answer 18

buoyant force

Question 19

when an object floats in a liquid, the buoyant force is

Answer 19

equal to the weight of the object

Question 20

the nucleus of an atom contains

Answer 20

protons and neutrons

Question 21

the positively charged particle inside an atom is the

Answer 21

proton

Question 22

the non charge particle in an atom is the

Answer 22

neutron

Question 23

the central core inside an atom is the

Answer 23

nucleus

Question 24

the particle that orbits the central core of an atom is the

Answer 24

electron

Question 25

the molecule is the basic unit of all

Answer 25

compounds

Question 26

DNA is a complex

Answer 26

molecule

Question 27

in the chemical formua for water, H2O, what does two mean

Answer 27

there are two hydrogen atoms in a molecule of water

Question 28

how many elements have been identified

Answer 28

114

Question 29

the buoyant force that jkeeps a ship afloat is an example of

Answer 29

Archimedes Principle

Question 30

the brakes in a car work because of

Answer 30

Pascals principle

Question 31

an atomizer works because of

Answer 31

Bernouli's Principle

Question 32

a helium balloon rises because of

Answer 32

Archimedes' principle

Question 33

when you suck through a straw, the force that makes the liquid go u the straw is

Answer 33

due to the pressure of the atmosphere

Question 34

the ratio of the density of a material to the density of water is the

Answer 34

specific gravity

Question 35

Water is flowing through a pipe whose cross sectional point at A is larger than the cross sectional area at point B. the reading on a pressure gauge connected to the pipe at point A willl be

Answer 35

Higher than the reading on a pressure gauge at Point B

Question 36

T/F a device that measures absolute air pressue is called a barometer

Answer 36

TRUE

Question 37

T/F the difference between the inside and outside of the tire is called the absolute pressure

Answer 37

FALSE

Question 38

T/F the SI unit of pressure is the pascal

Answer 38

TRUE

Question 39

T/F psi is a unit of force

Answer 39

FALSE

Question 40

T/F an ionized gas is called plasma

Answer 40

TRUE

Question 41

T/F plasma will conduct electricity

Answer 41

TRUE

Question 42

T/F gases an liquis are both fluids

Answer 42

TRUE

Question 43

T/F the upward force exerted by a fluid on an object immersed in it is called the buoyant pressure

Answer 43

FALSE

Question 44

T/F when an object floats in a liquid, the buoyant force is larger than the wight of the object

Answer 44

FALSE

Question 45

T/F the positively charged particle inside an atom is the nucleus

Answer 45

FALSE

Question 46

T/F the uncharged particle inside an atom is the neutron

Answer 46

TRUE

Question 47

T/F the central core in an atom is the neutron

Answer 47

FALSE

Question 48

T/F the object that orbits the central core inside an atom is the electron

Answer 48

TRUE

Question 49

T/F the number of protons in a nucleus of an atom tells which element it is

Answer 49

TRUE

Question 50

T/F the buoyant force that keeps the ship afloat is an example of Pascals Principle

Answer 50

FALSE

Question 51

T/F the brakes in a car work because of Pascals principle

Answer 51

TRUE

Question 52

T/F an atomizer works because of Bernouli's principle

Answer 52

TRUE

Question 53

T/F a helium balloon rises because of Archimedes' princilpe

Answer 53

TRUE

Question 54

T/F air can be compressed easily because there is a great deal of empty space between air molecues

Answer 54

TRUE

Question 55

T/F grvity causes the pressure in the ocean to vary by depth

Answer 55

TRUE

Question 56

T/F in a flowing fluid the pressure where the fluid is moving slower is higher than the presure where the fluid is moving faster

Answer 56

TRUE