Science Objects and Observation

Question 1

Characteristic of natural science

Answer 1

Objective
Make sense
Can develop
Real objects
Systematic

Question 2

Scientific method

Answer 2

Observation
Question
Collecting data
Hypothesis
Experiments
Analyze data and conclusions
Communicate

Question 3

Experiments

Answer 3

3 types of variables
- independent variable : cause
- dependent variable : effect
- control variable : that must not change, to make sure it’s a fair test

Question 4

Scientific attitude

Answer 4

Scientists works using scientific method and scientific attitude

Question 5

Microscope

Answer 5

Monocular and binocular
Microscopes are used to see a very small details

Question 6

Eyepiece

Answer 6

That is looked through at the top of the compound microscope. Typical magnification between 5x and 30x

Question 7

Head

Answer 7

Holds and connects the eyepieces to the objective lenses

Question 8

Arm

Answer 8

Supports microscope head and attaches it to the base

Question 9

Nosepiece

Answer 9

Rotates to change which objective lens is active

Question 10

Base

Answer 10

Supports the structure of microscope

Question 11

Objective lenses

Answer 11

3-5 objective lenses
Common magnifying lenses are 4x, 10x, 40x, and 100x

Question 12

Stage

Answer 12

Place where specimen is placed
Adjustable

Question 13

Slide holder

Answer 13

To hold slide in place

Question 14

Aperture/diaphragm

Answer 14

Controls the amount of light passing through aperture

Question 15

Condenser

Answer 15

Condenses the light from the base light and focuses it onto stage

Question 16

Mirror (monocular microscope)

Answer 16

Reflects light into the base of the microscope

Question 17

Illumination

Answer 17

Transmit light through specimen

Question 18

Fine focus

Answer 18

A knob use to fine tune the focus of a specimen

Question 19

Coarse focus

Answer 19

Move the objective lenses toward or away from the specimen

Question 20

Body tube

Answer 20

Separates eyepiece and nosepiece

Question 21

Light

Answer 21

Detect and magnify very small objects and enlarge them

Question 22

Toxic

Answer 22

• carbon monoxide
• cyanide
• mercury

Question 23

Harmful

Answer 23

• copper sulfate

Question 24

Irritant

Answer 24

• toilet cleaner

Question 25

Flammable

Answer 25

• petrol
• alcohol
• hydrogen
• methane

Question 26

Oxidising

Answer 26

• weed killer
• hair bleach

Question 27

Dangerous to the environment

Answer 27

• oil
• carbon monoxide

Question 28

Corrosive

Answer 28

• concentrated acid

Question 28

Corrosive

Answer 28

• concentrated acid