when an object has a surplus or deficiency of electrons
100
What is a charged object?
A charged object has either a positive charge or a negative charge.
100
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?
The balls only repel or attract each after they have been charged
100
Give me an example of gravity
throw the ball to return to the surface or
the apple when it fall down
100
Objects of ___________charge will be attracted to each other, while objects with the ________same charge will repel each other.
opposite same
200
Define Magnetic
a force that can act a distance
200
Give three examples of charge object
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
200
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.
The magnets are close together and their magnetic field lines may overlap.
200
Why is it important to have a compass?
A compass is a device that indicates direction. It is one of the most important instruments for navigation.
200
Both ___________and _______________forces can act at a ____________.
gravitational electromagnetic distance
300
Define Force
A push or A pull
300
Explain how objects stay on Earth.
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..
300
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?
The balloons repel each other at a distance.
300
What is a compass?
A compass is an instrument to used for navigation
300
The force of gravity ________objects, which pulls object toward Earth.
attracts
400
Define Gravity
Pulls objects towards the center of Earth
400
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.
As two charged objects are moved closer to each other, the magnitude of the force between the objects increases.
400
What two objects that will attract each other
Positively charged and Negatively charged
400
What are Cardinals Direction?
There are four main, or cardinal, points of the compass—north, south, east, and west.
400
One way to show interactions between objects is to map their _________.
force field
500
Define Gravitational Field
region of space surrounding a body that has mass and results in an attractive force
500
Electrical and gravitational effects can be thought to be caused by fields. How do fields help understand the effect of force?
Field such as gravitational or electric field are useful for understanding forces acting over a distance between objects.
500
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?
They can exert a force across a distance
500
Why does Earth have a magnetic field?
Currents from flowing molten iron and nickel in the core generates the magnetosphere, the magnetic field that surrounds Earth.
500
Earth’s ____________ protects it from solar winds
and solar radiation