Whats science? Scientific Method. Variables and Constants
Define science.
1. Asking questions
2. Everything described around us through observation
3. Doing experiments
4. Making a hypothesis
Everything described around us through observation
SI unit of temperature
Kelvin
How to find area of a triagle?
1/2 x b x h
Jelly beans is an example for mixture or compound?
Mixture
The amount of matter in an object.
Mass
A controlled experiment attempts to test how many factors at a time.
1
1km = __________m
1000
How to find area of a rectangle?
l x w
There are _____________ different kinds of known elements
118
The amount of space something occupies.
Volume
What is a hypothesis in scientific method?
educated guess
How to find volume of a rectangle?
l x w x h
Name the positively charged particle in the nucleus of the atom.
Protons
The ratio of mass to volume.
density
Give an example for uncontrolled experiment.
Human body
Meteor shower
Ozone depletion
Convert 10 miles to kilometers ( 1 mile= 1.61 km).
16.1 km
Find the area of a brick with a length of 5 cm and a width of 100 cm.
500 cm 2
What are the four states of matter? Give an example for plasma.
Solid, liquid, gas and plasma
Ex for plasma: star, lightning
What is the difference beytween variable factor and constant factor?
●A variable factor is something that can be varied or changed.
●Factors that do not change are called constant factors.
List the seven SI base units.
Meter Ampere
Candela Kelvin
Kilograms mol
Seconds
What is the area of the triangle with base 10 m and height 5 m?
25 m 2
Name the three particles present in an atom.
Protons, electrons and neutrons
Calculate the density, if mass is 18 kg and volume is 9 cm cubed.
2 kg/cm3