By: Efren fuertes

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# By: Efren fuertes - PowerPoint PPT Presentation

The Things I Learned. By: Efren fuertes. The Scientific Method. The Scientific method was the first thing we learned. The first step is observation. It talks about the organization of all testing things. The 2 nd step is research question. It has to be testable.

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Presentation Transcript
The Things I Learned

### By: Efren fuertes

The Scientific Method
• The Scientific method was the first thing we learned.
• The first step is observation. It talks about the organization of all testing things.
• The 2nd step is research question. It has to be testable.
• 3rd step is Collecting variables. There are 3 of them. Independent variable, dependent variable, and constant variable.
• 4th step is hypothesis. It is an educated guess.
• 5th step is procedure. It is the steps you used in the experiment.
• 6th step is analyze data. It shows the graphs you used.
• 7th step is conclusion. It talks about if your hypothesis is correct or wrong.
Matter
• Matter has mass and takes up space.
• Ex: wall, shoe, mouse
Physical/Chemical Changes
• Physical change is the way you change the look of something.
• Chemical change makes a new substance.
• Phy: crumpled paper.
• Che: burning wood.
States of Matter
• The three states of matter is solid, liquid, and gas.
• Particle arrangement
• Solid
• Liquid
• Gas
5 Phase changes
• Melting point-ice – water
• Boiling point-water – steam
• Freezing point- water- ice
• Condensation- heat- sweat
• Sublimation-dry ice- steam
Mixtures Elements and compounds
• Compounds: when 2 elements make a new element.
• Mixtures: when 2 substances make a new substance.
• Element: pure substance.
Homogeneous/Heterogeneous
• Homogeneous: can’t see the particles.
• Heterogeneous: can see the particles.
• Ex: Kool Aid
• trail mix
PE/KE
• Potential energy: stored energy
• Kinetic energy: energy of movement.
• Ex: about to kick a ball.
• Diving for a ball.

Chicharito

Atoms
• There are three types of atoms.
• 1. Protons: +
• 2.Electrons -
• 3.Neutrons +-
Periodic table
• Demister Mendeleev made the periodic table.
• There are 18 groups and 7 periods.
• The 4 parts of the periodic table is metals, transitional metals, non-metals, and gases.
• Ex: gold, silver, copper, and carbon.
The 3 types of heat
• 1. Conduction: Movement of heat by touch.
• 2. Convention: heat passes through a liquid.
• 3. Radiation: heat being pass in the air.
• Ex: Touching a hot stove.
• Touching hot water.
• Heat wave.
Speed
• The rate of motion( how fast)
• Ex: Speeding up the road.
Acceleration
• Increase of speed.
• Ex: The car is accelerating.
Forces and Motion
• Motion: anytime an object changes position.
• Force: anything that would change the movement of an object.
• Ex: Push a car.
Resistance and Gravity
• Resistance: slows something down.
• Gravity: the force that pulls you down to earth.
• Ex: running on sand.
• Rain
Balanced and Unbalanced
• Balanced: all the forces acting in one object.
• Unbalanced: when one force is acting upon an object.
• Ex: Bal: table

Unb: see saw

Friction and Net forces
• Friction: when 2 substances rub each other.
• Net forces: the sum of all forces.
Newton’s 1st Law
• Same thing as Inertia.
• An object would be at rest unless you put force.
• Ex: A ball would be in the air until someone catches it.
Newton’s 2nd Law
• The more mass an object has, the more force to move it.
• Ex: What needs more force, a pebble or a pencil.
Newton’s 3rd law
• For every action there is an equal or opposite amount of force.
• Ex: Leaning on a wall.
Momentum
• How hard it is to stop something.
• Ex: Stopping a car with your hands.
Work
• Anytime you move something apply a force and that force moves it.
• Ex: Pushing a car.
Power
• Amount of work we could do in a period of time.
• Ex: Weights
Waves
• A wave is a disturbance of energy that passes through matter that moves one place to another.
• Ex: Flag
Mechanical waves
• Need a medium to travel.
• A medium is matter that allows waves pass through it.
2 Types of waves
• Longitudinal: Up and down
• Transverse: Back and forth
• Ex: Long: Telephone wire.

Trans: Bell

Electromagnetic waves
• Do not need a medium.
• 7 electromagnetic waves:
• Microwave- ex: cell phones
• Infrared wave- senses body heat
• Visible light- anything we could see.
• Ultra violet rays-ex: sun, tanning beds
• X-rays – see your bones
• Gamma rays-identify organs./fastest
Reflection, Refraction, Diffraction
• Reflection- waves would bounce off objects.
• Refraction- Wave speed will vary based on the medium it is passing through.
• Diffraction- When waves go around, through, or between.
• Ex: pool

air, water, bottom of sea

waves going through holes.

Constructive and destructive interference
• Constructive: when 2 similar waves come together and they make a big wave.
• Destructive: when 2 opposite waves cancel each other.
Sound in different mediums
• Solid- slower
• Liquid-quicker
• Gas- quickest

Effect of temp on sound

• Hot: the waves would move really quick, because the particles move fast.
• Cold: the particles are real heavy and is slower.
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