Science Objects and Observation Flashcards
Characteristic of natural science
Objective
Make sense
Can develop
Real objects
Systematic
Scientific method
Observation
Question
Collecting data
Hypothesis
Experiments
Analyze data and conclusions
Communicate
Experiments
3 types of variables
- independent variable : cause
- dependent variable : effect
- control variable : that must not change, to make sure it’s a fair test
Scientific attitude
Scientists works using scientific method and scientific attitude
Microscope
Monocular and binocular
Microscopes are used to see a very small details
Eyepiece
That is looked through at the top of the compound microscope. Typical magnification between 5x and 30x
Head
Holds and connects the eyepieces to the objective lenses
Arm
Supports microscope head and attaches it to the base
Nosepiece
Rotates to change which objective lens is active
Base
Supports the structure of microscope
Objective lenses
3-5 objective lenses
Common magnifying lenses are 4x, 10x, 40x, and 100x
Stage
Place where specimen is placed
Adjustable
Slide holder
To hold slide in place
Aperture/diaphragm
Controls the amount of light passing through aperture
Condenser
Condenses the light from the base light and focuses it onto stage
Mirror (monocular microscope)
Reflects light into the base of the microscope
Illumination
Transmit light through specimen
Fine focus
A knob use to fine tune the focus of a specimen
Coarse focus
Move the objective lenses toward or away from the specimen
Body tube
Separates eyepiece and nosepiece
Light
Detect and magnify very small objects and enlarge them
Toxic
- carbon monoxide
- cyanide
- mercury
Harmful
- copper sulfate
Irritant
- toilet cleaner
Flammable
- petrol
- alcohol
- hydrogen
- methane
Oxidising
- weed killer
- hair bleach
Dangerous to the environment
- oil
- carbon monoxide
Corrosive
- concentrated acid
Corrosive
- concentrated acid
