Science ch.1.3

Question 1

A laboratory has different types of ________and______.

Answer 1

equipment and apparatus

Question 2

why do we use safety equipment when doing experiments?

Answer 2

protect our safety

Question 3

safety equipment examples

Answer 3

laboratory coat , safety goggles , gloves , fire blanket , fire extinguisher , sand bucket , eye wash bottle , first-aid box , fume cupboard

Question 4

Many ______ dangers ,so we must follow the ____

Answer 4

potential, rules

Question 5

always follow the _________ given by the teacher

Answer 5

instructions

Question 6

know the _____ escape_____

Answer 6

fire , route

Question 7

wear ______ ________ when heating and_______ substances

Answer 7

safety goggles, mixing

Question 8

After completing an experiment what should we do?

Answer 8

Wash hands

Question 9

keep the laboratory _______ and _______

Answer 9

clean and tidy

Question 10

when should we report accidents to the teacher

Answer 10

immediately

Question 11

Dont _____ or __p____ in the laboratory

Answer 11

run , play

Question 12

Dont _e___ or ________ in the laboratory

Answer 12

eat , drink

Question 13

two more examples of don’t do examples

Answer 13

Dont touch hot apparatus , don’t throw solid waste into the sink , don’t smell or taste any chemicals unless teacher says so

Question 14

what is the use by tying up our hair and tucking in ties when doing experiments

Answer 14

this prevents our hair , ties or clothes from catching fire

Question 15

what is the use of hazard warning symbols?

Answer 15

It warn us of potential dangers of the chemicals

Question 16

Where are hazard warning symbols put on?

Answer 16

on the container of some chemicals

Question 17

examples of hazard warning symbols 9 examples

Answer 17

harmful , irritant , corrosive , flammable , explosive , carcinogenic , radioactive , toxic , oxidising

Question 18

flammable items should be kept..

Answer 18

away from heat and flames

Question 19

Corrosive items should be dealt with ______ _______ and _______ and stored in a ____ _________ ______

Answer 19

safety goggles , gloves , well ventilated room

Question 20

when touched irritant chemicals we should

Answer 20

wash our hands

Question 21

we should avoid breathing in the toxic ____ of the chemical

Answer 21

vapour

Question 22

when accidents happen we need to stay _____.

Answer 22

calm

Question 23

cut accident what to do

Answer 23

clean wound with water and apply dressing to it

Question 24

Chemical get into the eyes

Answer 24

Wash the eyes with distilled water from an eye wash bottle

Question 25

heat or chemical burns

Answer 25

place the affected area under slow running water

Question 26

glass breakage

Answer 26

clean up the Brocken pieces of glass and dispose in a broken glass container, not general rubbish bin

Question 27

Gas leakage

Answer 27

turn off gas supply ,open all windows and doors , tell teachers

Question 28

the fire triangle three conditions

Answer 28

oxygen , fuel , high temperature

Question 29

why do damp items don’t catch fire?

Answer 29

water absorbs heat and lowers the temperature required for burning.

Question 30

If we put a jar over a burning candle why does the candle go out?

Answer 30

the oxygen inside the jar is used up , so there are no more oxygen to support burning

Question 31

why can carbon dioxide put out fire?

Answer 31

Carbon dioxide is denser than air , then the carbon dioxide will sink in air which blocks the supply of oxygen to the fire.

Question 32

to put out a fire we just need to take away on of the three conditions. why?

Answer 32

without any one of the three conditions, the fire triangle cannot be formed, and the fire will go out.