science test unit 1

Question 1

Know how to determine the following for solids and liquids: D

Answer 1

D=M/V Density=Mass divided by Volume

Question 2

Know how to determine the following for solids and liquids: Solid and what if its to big

Answer 2

-small enough-Displacement of water
–too large–Measurement and Calculation

Question 3

Know how to determine density–Density problem on test

Answer 3

D=M/V
solids–g/cm3
Liquids–g/ml
They are equal

Question 4

Know what pH readings make a chemical corrosive
Corrosive-

Answer 4

pH below 3 or above 12 eats away at metals

Question 5

Know what pH readings make a base and acid

Answer 5

12 and up strong base 3 and below strong acid

Question 6

Know the characteristics of a chemical reaction

Answer 6

change in temperature (hot/cold), removal of waste, production of gas, color change

Question 7

Determine volume of a graduated cylinder
Meniscus

Answer 7

look at middle bottom for reading

Question 8

Toxicity

Answer 8

can harm to living organisms

Question 9

Know what happens when different liquids with different densities are mixed together-lower D

Answer 9

it floats

Question 10

Know what happens when different liquids with different densities are mixed together-higher D

Answer 10

it sinks

Question 11

Water

Answer 11

density of 1.0 g/ml

Question 12

Density smaller than 1.0 g/ml-water

Answer 12

floats

Question 13

Density larger than 1.0 g/ml-water

Answer 13

sinks

Question 14

How does the Porter County HazMat Team deal with an unknown substance ?

Answer 14

Observe from distance
Prep for Safety
Test Temperature
Flammability
pH Test, Cobalt Blue Test (paper)
ID chemical from sample
Dispose of chemical

Question 15

What does miscibility in water mean

Answer 15

Two chemicals mix together, don’t separate

Question 16

Mixture

Answer 16

Not miscibility, because it can’t separate.

Question 17

Mixture

Answer 17

Not miscibility, because it can be separate.