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School of Modern Skills
Name:
UNIT : 13
LESSON
Science Department
Grade: 5
6 : WHAT IS THE ATOMIC THEORY
?
■ Atom: smallest unit of an element that maintains the properties of that element.
■ Atomic theory : scientific explanation of the structure of atoms and how they interact with other atoms.
■ At the center of an atom is a small, dense core called the nucleus, which is surrounded by
electrons.
■ Proton : a positively ( + ) charged particle found in the nucleus of an atom.
■ Neutrons: particles found in the nucleus, but a neutron has no charge.
■ Electrons are negatively ( - ) charged particles.
■ Electron Clouds :
■ Element:
area around the nucleus that electrons move.
a type of matter made of just one kind of atom.
■ Molecule: made up of two or more atoms joined together chemically.
■ Compound : substance formed by atoms from two or more elements.
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School of Modern Skills
Name:
UNIT : 13
LESSON
Science Department
Grade: 5
6 : WHAT IS THE ATOMIC THEORY
Q1 . Fill in the blanks : (1 pts each )
?
____/ 5
Element – Nucleus -Atom – Compound- Molecule
1.
2.
3.
4.
5.
ATOM smallest unit of an element.
Matter that has only one kind of atom is called ELEMENT .
Molecule made up of two or more atoms joined together .
Substance that is formed from two or more elements is called Compound .
Nucleus is found in center of atom.
Q2. Draw an atom and label its parts
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School of Modern Skills
Name:
UNIT : 14
■ Wave :
Science Department
Grade: 5
LESSON
1 : WHAT IS SOUND ?
a disturbance that transmits energy.
- Sound is a series of vibrations traveling in waves.
■Vibrations :
back-and-forth movements of an object.
- All sound vibrations travel in compression waves.
- As a compression wave moves, molecules of air or other matter are pushed together, or compressed.
- The molecules spread apart, and sound energy moves away from its source as this bunching and spreading of
molecules repeats.
■Pitch : the highness or lowness of a sound .
■ Frequency : the number of vibrations that occur during a unit of time.
- High-pitched sounds have high frequencies.
- Low-pitched sounds have low frequencies.
■ Volume :
■ Crest :
The loudness of a sound.
Each high point of a wave .
■ Trough:
Each low point of a wave .
■ Wavelength : The distance from one crest to the next .
■ Amplitude:
describes the amount of energy in a wave.
- Loud sound  large amplitude
- Soft sound
 small amplitude.
■ Sound can only travel if there are particles that the waves can cause to vibrate.
■ If there are no particles to move, then sound cannot travel.
■ The speed at which sound waves pass through solids, liquids, and gases has to do with how
their particles are arranged.
■
Sound travels through gases more slowly than it travels through liquids and solids.
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School of Modern Skills
Name:
UNIT : 14
Science Department
Grade: 5
LESSON
1 : WHAT IS SOUND ?
Q1 . Fill in the blanks : (1 pts each )
____/ 5
frequency - volume – wave- pitch - vibration
1. WAVE is the disturbance that transmit energy
2. back and forth movement is called VIBRATION.
3. PITCH is the highness or lowness of sound
4. loudness of sound is called VOLUME .
5. FREQUENCY is the number of vibration that occur in period of time.
Q2. Draw a sound wave and label its parts
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