اسئلة عشوائية التشابتر الاول Flashcards
(26 cards)
Types of mixtures
Homogeneous mixture and heterogeneous mixture
How many elements have been identified?
114 elements
How many elements are naturally on earth?
82 elements
How many elements are created by scientists?
32 elements
The TWO types of matter
Mixtures and pure substances
The two types of substances
Compounds and elements
Compound separated by chemical methods give us
Elements
The THREE states of matter
Solid, liquid, gas
From GAS to LIQUID
condensation
From LIQUID to GAS
vaporization
From LIQUID to SOLID
Freezing
From SOLID to LIQUID
melting
The TWO types of change
Physical change and chemical change
What forms when hydrogen burns in air?
Water
Is it chemical change or physical change?
Snow in winter
Physical change
Is it chemical change or physical change?
Wood burning
Chemical change
Is it chemical change or physical change?
Dissolved sugar and water
Physical change
Is it chemical change or physical change?
Mold in bread
Chemical change
Extensive property measures
Mass (m), length (l), volume (v)
Intensive property measures
Density (d), temperature (t), color
The unit for length
Meter
The unit for mass
Kilogram
The unit for time
Second
The unit for electrical current
Ampere
