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Where do we get access to news and information?
The internet.
This type of modern machine help us save water.
The water flow regulators
We use them to regulate the temperatures in our homes.
The thermostat.
What type of modern machines help us reduce time and energy spent on everyday tasks?
The appliances.
How do modern machines help us?
They make doing tasks easier for us and help us save energy.
What part of complex machines produce movement?
The motor.
What controls the components of complex machines?
The switches or steering wheels.
What parts of complex machines give information?
The screens and indicators.
What are complex machines? What type of tasks they do?
They are machines made with many parts which works with electricity or fuel. They perform more complex tasks than simple machines?
What type of ramp is used to move objects up and down?
An inclined plane.
This is a type of wheel with a rope which is used to lift or lower heavy objects?
A pulley.
What simple machine do we use to lift heavy objects easier?
A lever.
What do we call the forces that act at a distance?
We call them non-contact forces.
What are simple machines?
They are machines with one or a few parts. Many of them help us move or lift things.
What were some of the simple machines that helped the Egyptians to build the pyramids?
Wheels, levers, pulleys, and inclined planes.
Why did people invent simple machines?
They built it to help them make work easier.
Does gravity change?
No, it remains the same.
True or False? The lower we drop an object, the slower the speed of it when it hits the ground.
True
What do you call the force that pulls every thing back to Earth?
We call it Gravity.
What happens when we put the opposite poles of two magnets together?
They attract each other.
What happens when we put the same poles of two magnets together?
They repel each other.
In what direction does a magnetic field flows?
It flows from the north pole to the south pole.
What do you call the two ends of the magnet? Name them.
They are called poles; the north pole and the south pole.
What do magnets have?
They have magnetic force.
Which has more friction, rough or smooth surfaces?
Rough surfaces
Does an object move by itself?
No, a force needs to act on it for it to move.
Name everyday activities where we use Friction.
When we are walking, running, jogging, driving a car, riding a bicycle, etc...
When does Friction occur?
It occurs when two objects rub againts each other.
What is Friction?
It is the force that causes a moving object to stop moving.
What do we call the objects that break when we apply force to them.
Rigid Objects
Name an object that changes shape temporarily.
A sponge.
Do all objects change shape permanently?
No, only some objects change shape permanently.
When do we apply force to an object?
Whenever we push or pull it.
What are forces?
It is something that can make an object start moving, stop moving, change shape or break.
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