Transcript Physics-Science and Me Grade 5

Physics
Science and Me
Grade 5
What is Physics?
Physics is that part of natural
science which deals with the laws
and properties of matter, and the
forces acting upon it.
Systems
A system is made up of parts that work
together to perform a common function.
switch
bulb
spring
reflector
case
protective
glass
batteries
Systems
switch
reflector
batteries
bulb
case
Protective
glass
•Nonessential
Some parts of Essential
the
Parts are essential—
Parts
system
they are necessary for
the system to work.
• Other parts might be
nonessential—the
system will still function
without them.
• Which part(s) could be
removed and the
flashlight would still
work? Make a table in
your science journal.
List the essential parts
and the nonessential
parts of the flashlight.
Force and Motion
In order to find the speed that an object is moving, you must know
the distance traveled and the time it took to go that distance.
speed =
distance .
time
Force and Motion
Find the speed of each object in the instances below. Write your
answers in your science journal. Be sure to label your answer
(cm/sec, etc.).
1. A car traveled 450 miles in 5 hours.
2. A man ran 28 miles in 7 hours.
3. It took 30 minutes for a snail to go 60
cm.
4. A jet plane went 12 km in 6 seconds.
5. It took a bird 12 minutes to fly 48 m.
Sound
What is sound?
Sound is made when an object vibrates.
Pitch
A sound can be high-pitched. The object vibrates faster.
A sound can be low-pitched. The object vibrates slower.
Volume
An object with bigger vibrations makes a louder sound.
An object with smaller vibrations makes a softer sound.
Sound can only travel through materials: gas, liquid, or solid. If
there is no material, no sound can travel!
Forms of Energy
• Electrical
• Light
• Sound
• Heat
• Solar
The Sun
• Almost all of the energy found on
the Earth comes from the sun.
• The sun provides light and heat for
the Earth.
Light
•
When light hits a
reflective surface such
as a mirror, it changes
directions. We call
that reflection.
•
When light passes
through some substances,
it slows downs and bends.
This is called refraction.
Electricity
In order to make a
bulb light up,
there must be a
complete circuit.
Electricity
Making the electric current stronger will
make the bulb burn brighter.
Electrical Circuits
In a series circuit, all of the bulbs are connected
by one wire. That means that every time you
increase the number of bulbs, each bulb gets
dimmer. Also, if one bulb goes out, they will all
stop burning.
Electrical Circuits
In a parallel series all of the bulbs have a more
direct connection to the power source. The
voltage across every bulb is the same. All of the
bulbs shine with the same brightness. If one
bulb goes out, the others stay lit.
Electromagnet
An electromagnet is a magnet formed from an electric current.
The most common electromagnet consists of a wire coiled
around a metallic core attached to a power source such as a
battery. An electromagnet is a temporary magnet that can
attract magnetic objects such as paper clips and other nails.
Created by
Shirley Willingham
Houston Academy