Chapter 1.1

Question 1

How to you gain Scientific knowledge?

Answer 1

Scientific investigations

Question 2

How should we think while doing a Scientific investigation?

Answer 2

Critically
Creatively
Be observant and analytical

Question 3

What is the idea behind an investigation?

Answer 3

Observe carefully
Measure accurately
Communicate effectively
Develop hypothesis logically

Question 4

Name each of the steps and explain them shortly?

Answer 4

Ask question:
Testable

Make hypothesis:
Educated guess

Plan investigation:
Tools needed for it and what going to do

Test hypothesis:
Record data, perform fair test, sometimes repeat test to be fair.

Conclusion, analyzing intrepid results:
Hypothesis, proven correct, incorrect, and why.

Question 5

How do we conduct a fair test?

Answer 5

Change one thing while keeping others same.

Question 6

What is and independent variable?

Answer 6

What I change.

Question 7

What is a dependent variable?

Answer 7

What I observe.

Question 8

What is a controlled variable?

Answer 8

What I keep the same.

Question 9

6 heating and fire safety rules.

Answer 9

Wear safety goggles.

Only heat chemical when told.

Clean work area, materials away from flames.

Never reach across flame.

Never heat liquid in closed container.

Use water bath when heating test tubes.

Question 10

5 chemical safety rules.

Answer 10

Only mix chemicals when told.

Notify teacher when spill

Pour liquids over sink

Pour acid into water, when diluting

Rinse acid on clothing or skin with water immediately.

Question 11

3 Glassware safety rules.

Answer 11

Never force rubber stopper into tube

Never heat glassware not thoroughly dry

Use wire screen to protect glassware against open flame

Never pick up glassware without checking if hot

Never use chipped or broken glassware

Question 12

Sharp instruments safety.

Answer 12

Cut away from yourself

Be careful

Notify teacher when cut self

Question 13

End investigation rules.

Answer 13

Clean up work area

Everything back in place

Wash hands after

Turn of burner

Check gas line leading to burner of

Question 14

10 general safety rules.

Answer 14

Follow instructions

Know location safety equipment

Dress for laboratory

Don’t eat drink in lab

Don’t taste sniff chemicals

Act responsible

Know what to do with lab accidents

Leave experiments in lab

Don’t experiment on self

Know what to do with experiment when over

Question 15

Objective lenses?

Answer 15

Forms magnified image of object.

Question 16

Revolving nosepiece?

Answer 16

Houses objective lenses

Question 17

Eyepiece Lenses?

Answer 17

Lenses closest to eye
Further magnified
Multiplies and adjusts magnification of objective lens

Question 18

Body tube?

Answer 18

Connect ocular to objective lenses.

Question 19

Arm?

Answer 19

Support tube, connect to base.

Question 20

Mechanical stage?

Answer 20

Object placed onto, hole in so light shine through.

Question 21

Iris diaphragm?

Answer 21

Rotating part under stage.

Allow regulate adjust amount of light.

Question 22

Illumination?

Answer 22

Light source, base of microscope.

Mirror, flat one, concave other, reflect light through specimen.

Question 23

Base?

Answer 23

Keep steady.

Stand for microscope.

Question 24

Course adjustment knob?

Answer 24

Only used with low power lenses.

Adjust scope quickly so specimen approximately in focus.

Question 25

Fine adjustment knob?

Answer 25

Moves scope slower so specimen perfectly in focus.

Medium or high power objective lenses.