when an object has a surplus or deficiency of electrons
DEFINE Charged object
100
A charged object has either a positive charge or a negative charge.
What is a charged object?
100
The balls only repel or attract each after they have been charged
Students are investigating electric field using pith balls, small spheres that have low density. Which of the following observations supports the claim that a charged pith ball will create an electric field that acts on the other pith balls?
100
throw the ball to return to the surface or
the apple when it fall down
Give me an example of gravity
100
attracts repel opposite same
Objects of ___________charge will be attracted to each other, while objects with the ________same charge will repel each other.
200
a force that can act a distance
DEFINE Magnetic
200
balloon that you rubbed against your hair
socks fresh from the dryer that have static electricity on them
balloon that you rubbed against wool cloth
Give three examples of charge object
200
The magnets are close together and their magnetic field lines may overlap.
Six students are trying to map the magnetic field lines of a bar magnet. They have each placed a bar magnet on the lab table they share and are using compasses to detect and draw the field lines.
200
A compass is a device that indicates direction. It is one of the most important instruments for navigation.
Why is it important to have a compass?
200
force field gravitational push electromagnetic
distance
Both ___________and _______________forces can act at a ____________.
300
A push or A pull
Define force
300
Since the Earth is bigger than any object on the planet, it has the greatest gravitational pull an all objects are pulled towards the center of the planet.
Explain how objects stay on Earth.
300
The balloons repel each other at a distance.
Students are investigating the forces that result from electric charges. They rub inflated balloons against their hair or with wool cloth. Which of the following observations supports the claim that the balloons have the same electric charge?
300
A compass is an instrument to used for navigation
What is a compass?
300
same electromagnetic attracts pull
The force of gravity ________objects, which pulls object toward Earth.
400
Pulls objects towards the center of Earth
Define Gravity
400
As two charged objects are moved closer to each other, the magnitude of the force between the objects increases.
Two charged objects are initially at a distance from each other and are moved closer together. Describe the change in the magnitude of the force between the two objects.
400
Positively charged and Negatively charged
What two objects that will attract each other
400
There are four main, or cardinal, points of the compass—north, south, east, and west.
What are Cardinals Direction?
400
Force Field objects magnetic
One way to show interactions between objects is to map their _________.
500
region of space surrounding a body that has mass and results in an attractive force
Define gravitational field
500
Field such as gravitational or electric field are useful for understanding forces acting over a distance between objects.
Electrical and gravitational effects can be thought to be caused by fields. How do fields help understand the effect of force?
500
They can exert a force across a distance
Moving a magnet near a compass can cause the compass needle to move, even though the magnet does not touch the compass. This observation is evidence for which characteristics of magnetic fields?
500
Currents from flowing molten iron and nickel in the core generates the magnetosphere, the magnetic field that surrounds Earth.
Why does Earth have a magnetic field?
500
magnetic field pull or push same
Earth’s ____________ protects it from solar winds
and solar radiation