Exam

Question 1

There is no doubt that a chemical reaction has occurred if…

Answer 1

a new substance has been formed

Question 2

Which of the following is a physical property of sugar

Answer 2

It is a white crystalline solid

Question 3

What is a chemical property

Answer 3

a characteristic of a substance that describes its ability to undergo a chemical change, resulting in the formation of a new substance.

Question 4

What is a physical property

Answer 4

a characteristic of a substance that can be observed or measured without changing the substance’s chemical composition

Question 5

Which of the following is a chemical property of a substance

a - floats on the surface of mercury
b - is clear and colorless
c - coats itself with an oxide
d - is soluble in water
e - coats itself with an oxide when exposed to air

Answer 5

coats itself with an oxide when exposed to air

Question 6

A gas can be proven to be oxygen by means of

Answer 6

a glowing splint, which bursts into flame

Question 7

When a burning splint “pops” in the mouth of a test tube, which one of the following is present

Answer 7

hydrogen

Question 8

A gas is proved to be carbon dioxide if

Answer 8

limewater goes milky when shaken with the gas

Question 9

when zinc metal is dropped into hydrochloric acid, which gas or gases would be produced

Answer 9

hydrogen gas only

Question 10

A solid element looks silvery and shiny when its surface has been freshly sanded and polished. It will stretch without breaking if enough pulling force is applied. This element is most likely classed as a

Answer 10

metal

Question 11

In a Periodic Table, elements with similar properties are grouped in

Answer 11

vertical columns

Question 12

An atom has a total of 18 electrons. These electrons are found in 3 orbits that have

Answer 12

2,8,8 electrons moving out from the nucleus

Question 13

which of the following atoms has the electron orbit of 2,7

Answer 13

F

Question 14

An atom becomes a negatively charged ion when it

Answer 14

gains electrons

Question 15

Which of the following atoms or ions has an electron orbit arrangement that is different from the others

Answer 15

Mg +2

Question 16

covalent / molecular bonds are due to the

Answer 16

sharing of two electrons by two atoms

Question 17

what does the “+” mean in a chemical equation

Answer 17

reacts with

Question 18

In any chemical reaction, the total mass of the reactants is always equal to the total mass of materials produced. This in known as the law of

Answer 18

conservation of mass

Question 19

A balanced chemical equation takes into account the theory that

Answer 19

atoms are neither created nor destroyed in chemical reactions

Question 20

what type of reaction does the following equation represent:

Ag2S –> 2Ag + S

Answer 20

decomposition

Question 21

a single displacement chemical reaction can be compared to

Answer 21

a person “cutting in” on a dancing couple

Question 22

what type of reaction does the following equation represent:

2KI +Pb(NO3)2 –> 2KN03 + Pbl2

Answer 22

double displacement

Question 23

A synthesis chemical reaction can be compared to

Answer 23

two single people joining for a dance

Question 24

what type of reaction does the following equation represent:

H2 SO4 +Mg –> MgSO4 + H2

Answer 24

single displacement reaction

Question 25

If BaCl2 and Na2SO4 solutions are mixed together a

Answer 25

double displacement reaction occurs

Question 26

The speed at which a chemical reaction occurs is called its

Answer 26

rate of reaction

Question 27

The longer the time taken for a chemical reaction to occur

Answer 27

the slower the rate of reaction

Question 28

According to the "collision model" the rate of a chemical reaction could be increased by which of the following

Answer 28

- carrying out the reaction at a higher temperature - adding a catalyst - increasing the concentration of reactants

Question 29

an acid would have which of the following properties

Answer 29

tastes sour

Question 30

a pH of 8 would be considered

Answer 30

slightly basic

Question 31

a solution with a pH of 2 is said to be

Answer 31

strongly acidic

Question 32

a solution with a pH of 7 is said to be

Answer 32

neutral

Question 33

a solution has a pH of 4. If enough water was added to 1.0L of this solution to bring the total solution volume up to 10L the solution would have a pH of about

Answer 33

5

Question 34

What is a beam

Answer 34

A bundle of rays

Question 35

what is a ray

Answer 35

a straight-line path of light

Question 36

what is an incandescent

Answer 36

Glowing or white with heat

Question 37

what is the first law of reflection

Answer 37

the angle of incidence = the angle of reflection

Question 38

what is a diverging beam

Answer 38

Rays spreading outward

Question 39

what is Snell's law

Answer 39

n1sin01 = n2sin02

Question 40

Spectrum

Answer 40

the range of colours observed when white light is split into its components

Question 41

Index of Refraction

Answer 41

Amount by which a transparent material decreases the speed of light

Question 42

what is a converging beam

Answer 42

Rays coming together

Question 43

what are the three different types on light media

Answer 43

transparent, translucent, and opaque

Question 44

what are some examples of transparent media

Answer 44

window, clear bottle

Question 45

what are some examples of translucent media

Answer 45

wax paper, frosted glass

Question 46

what are some examples of opaque media

Answer 46

a block of wood, desk

Question 47

why do objects have colour

Answer 47

because of colour theory, the light we see is the colour that is being reflected back to our eyes, while the other colours are absorbed

Question 48

provides a barrier between the outside and the inside of the cell. It allows materials to pass in and out of the cell

Answer 48

cell membrane

Question 49

Saclike structure that contains proteins that break down larger molecules

Answer 49

lysosome

Question 50

series of canals that move products from one place to another within a cell

Answer 50

Endoplasmic Reticulum

Question 51

contains genetic infromation in thread-like structures

Answer 51

chromosomes

Question 52

helps to provide the cell with energy "the powerhouse" of the cell

Answer 52

mitochondria

Question 53

cell control centre, directs all cell activities

Answer 53

nucleus

Question 54

stores materials such as water, minerals and food

Answer 54

vacuoles

Question 55

protects the cell and gives it structural support.

Answer 55

cell wall

Question 56

small structures critical to cell division attaches to spindle fibres

Answer 56

kinetochores

Question 57

small organelle that builds proteins

Answer 57

ribosome

Question 58

contains chlorophyll that convertes sunlight, CO2 and water into glucose

Answer 58

chloroplasts

Question 59

packages protein and fat from the endoplasmic reticulum

Answer 59

golgi apparatus

Question 60

what is G1 in the cell cycle

Answer 60

first growth phase

Question 61

what is S in the cell cycle

Answer 61

synthesis phase

Question 62

what is G2 in the cell cycle

Answer 62

second growth phase

Question 63

what is M in the cell cycle

Answer 63

Mitosis

Question 64

what is C in the cell cycle

Answer 64

cytokinesis

Question 65

are all the cells in your body alike, why or why not

Answer 65

no they are not all the same, they have the same genetic information but have different jobs. for example: lung cells are different from brain skin cells

Question 66

what are 3 reasons for why cells divide

Answer 66

To heal and repaire dead / damaged cells and tissues. 2) To grow 3) To reproduce

Question 67

lines body cavities and provides a protective covering for organs, glands, and the outer surface of the body

Answer 67

Epithelial tissue

Question 68

is comprised of unspecialized cells located in root tips and the cambium active growth layer beneath the bark of trees, and other vascular plants, that creates three growth rings. its main function is to produce the new tissues needed as the plant grows

Answer 68

meristematic tissue

Question 69

supports and protects structures but its main function is to join other tissues together. this tissue forms blood, stores fats and fills empty space

Answer 69

connective tissue

Question 70

allows organisms to move, there are three types skeletal - found in your arms and legs smooth - found in blood vessels, the stomach and other organs cardiac - found in the heart

Answer 70

The muscular tissue

Question 71

can be found throughout the plant and its functions is related to its location. it can be responsible for photosynthesis, storage, and support

Answer 71

Ground tissue

Question 72

made of specialized nerve cells that respond to stimuli and transmit and store infromation

Answer 72

Nervous Tissue

Question 73

functions to transport water and nutrients throughout the plant. there are two types of vascular tissue in plant - xylem, which is used for water transport, and phloem, which is used to transport sugars and other solutes

Answer 73

Vascular tissue

Question 74

found on the top and underside of leaves and needles contains specialized gas exchange cells called stomas. this tissue is very this and clear and its primary purpose is to facilitate the movement of carbon dioxide, water, and oxygen into and out of the leaf.

Answer 74

Epidermal tissue,

Question 75

what are three functions of the skin

Answer 75

1) First line of defense from the outside environment (protection). 2) Barrier from disease. 3) Insulation

Question 76

what are two functions of lungs

Answer 76

1) Supply body with oxygen 2) Rid the body of CO2

Question 77

what are two functions of the heart

Answer 77

1) Works with lungs to supply the body with oxygen. 2) Drives the distribution of both nutrients and hormones.

Question 78

explain how gas exchange occurs in the body

Answer 78

facilitated by diffusion

Question 79

describe the movement of food through the digestive tract

Answer 79

muscle contractions that propel food along the esophagus, stomach, and intestines.

Question 80

what are cancer cells? why are they harmful

Answer 80

abnormal cells that divide uncontrollably and can invade and destroy healthy body tissue

Question 81

contact inhibition what is is and how does it relate to cancer calls

Answer 81

mechanism where cells stop dividing when they physically touch each other.