Science Sem 2 Feb 10 Grade 9

Question 1

What does qualitative observation mean?

Answer 1

Qualitative observation is interpretation-based.

Question 2

What does quantitative observation mean?

Answer 2

Qualitative observation is based on measurements and counting.

Question 3

What does correlation mean?

Answer 3

Correlation identifies a pattern between the independent variable and dependent variable. e.g: birthday parties cause aging.

Question 4

What does causation mean?

Answer 4

Causation is the pattern between the independent variable and dependent variable because of the independent variable. e.g: skipping lunch causes hunger.

Question 5

What does WHMIS mean?

Answer 5

Workplace Hazardous Materials Information System.

Question 6

What does HHPS mean?

Answer 6

Hazardous Household Products Symbols.

Question 7

What does the octagon mean?

Answer 7

Danger.

Question 8

What does the square mean?

Answer 8

Warning.

Question 9

What does the upside down triangle mean?

Answer 9

Caution.

Question 10

What does the skull symbol mean?

Answer 10

Poisonous.

Question 11

What does the fire symbol mean?

Answer 11

Flammable.

Question 12

What does the spark symbol mean?

Answer 12

Explosive.

Question 13

What does the hand symbol mean?

Answer 13

Corrosive.

Question 14

What is the function of a erlenmeyer flask?

Answer 14

For measuring and pouring liquids. For heating/mixing substances. Shape avoids loss due to splashing.

Question 15

What is the function of a dropper?

Answer 15

Used to transfer a SMALL amount of liquid.

Question 16

What is the function of a test tube holder?

Answer 16

Used for holding individual test tubes.

Question 17

What is the function of safety glasses?

Answer 17

To protect the eyes.

Question 18

What is the function of a funnel?

Answer 18

Transfer of liquids from one vessel to a small opening.

Question 19

What is the function of a beaker?

Answer 19

For measuring and pouring liquids. For heating/mixing substances.

Question 20

What is the function of a scoopula?

Answer 20

For moving samples of solids. Not used for stirring.

Question 21

What is the function of beaker tongs?

Answer 21

Lifting hot beakers.

Question 22

What is the function of a test tube?

Answer 22

For heating or mixing a small amount of chemicals.

Question 23

What is the function of a thermometer?

Answer 23

For measuring temperature.

Question 24

What is the function of a wash bottle?

Answer 24

For rinising or adding water.

Question 25

What is the function of a watch glass?

Answer 25

For holding or covering chemicals.

Question 26

What is the function of an electronic balance?

Answer 26

For measuring weight.

Question 27

What is the function of a graduated cylinder?

Answer 27

For measuring and pouring liquids. Not for heating/mixing.

Question 28

What is the function of a glass stirring rod?

Answer 28

Used to stir solutions.

Question 29

What is the function of a test tube rack?

Answer 29

Holding one or more test tubes.

Question 30

What does the symbol "Exploding Bomb" mean?

Answer 30

For explosive or reactivity hazards.

Question 31

What does the symbol "Flame" mean?

Answer 31

For fire hazards.

Question 32

What does the symbol "Flame Over Circle" mean?

Answer 32

For oxidizing hazards.

Question 33

What does the symbol "Gas Cylinder" mean?

Answer 33

For gases under pressure.

Question 34

What does the symbol "Corrosion" mean?

Answer 34

For corrosive damage to metals as well as skin and eyes.

Question 35

What does the symbol "Skull and Crossbones" mean?

Answer 35

Can cause death or toxicity with short exposure to small amounts.

Question 36

What does the symbol "Health Hazard" mean?

Answer 36

May cause or suspected of causing serious health effects.

Question 37

What does the symbol "Exclamation Mark" mean?

Answer 37

May cause less serious health effects or damage the ozone layer.

Question 38

What does the symbol "Environment" mean?

Answer 38

May cause damage to the aquatic environment.

Question 39

What does the symbol "Biohazardous Infectious Materials" mean?

Answer 39

For organisms or toxins that can cause diseases in people or animals.

Question 40

What does GHS mean?

Answer 40

Globally Harmonized System.