- Matter is anything that has mass and takes up space.
- Matter is made up of atoms and molecules.
- Ernest Rutherford discovered atoms.
- Atom is building block of matter.
- Atoms are really made of a positively charged center called the nucleus, orbited by negatively charged particles called electrons.
- Volume : the measure of the size of a body or object in three dimensional spaces.
How to measure the volume
|Volume of liquid||Volume of irregular shaped solid||Volume or regular shaped solids|
|Measurement tools||Graduated cylinder||Liquid + graduated shaped solids||Ruler|
|Method||Look and read the bottom of meniscus||1-Measure the volume of liquid V1
2- put the object in cylinder
3-read the new volume of liquid V2
4- V object=V2-V1
|Use the formula
|Measurement unit||ml / L||Cm3||Cm3|
- Mass is a measure of the amount of matter in an object.
- Always constant anywhere in the universe.
- Measuring units are in gram(g) or kilogram (Kg)
- Mass Is measured using a balance
- Weight is a measure of gravitational force on an object.
- Changes depend on where the object is in the universe.
- Measuring unit is Newton (N)
- Can be measured using a spring scale
- Each 1 Kg = 10 N
- Weight (N) = mass in (kg) * 10
- Weight (N) = mass in (g) / 100
- Example: What is the weight of a cat that has a mass of 1,362,000 g?
Weight = mass /100
Weight = 1,362,000/100 = 13620 N
- Example: What is the weight of a car that has a mass of 1436 Kg?
Weight = mass (Kg) * 10
Weight = 1436*10 = 14360 N