NAME THAT FORCE
What force happens when two objects rub together?
Friction
True or false: Gravity is caused by the sun
FALSE (caused by the earth)
Name and describe an example of gravity
Causes things to fall towards the earth. ex. Tripping, dropping a book.
Name 6 forces of nature.
Tsunami, flood, hurricane, tornado, earthquake, volcano, avalanche, landslide, drought, wildfire...
True or false: We use forces every day.
True
Has an invisible forcefield
Magnetic Force
Name 3 ways you can use muscle force
(any 3 actions!)
Name and describe an example of friction.
Two things rubbing together cause the object to slow or speed up. ex. Car tires have treads which rub against concrete to help us slow down.
What force of nature can be caused by an earthquake or underground volcano?
Tsunami?
TRUE
You jump off a diving board. What force occurs?
Gravity
What force can cause your compass to go out of whack?
Magnetic
Name and describe an example of magnetic force.
Two opposite poles (N + S) attract metal. Ex. nickel coins, nails
Name 2 ways a force of nature happens (in general)
1. Natural causes (ex. earth moves).
2. Human causes (ex. building a home).
Name 3 materials that are buoyant from our experiment.
What force keeps your boat floating?
Buoyancy
Name 2 places we want high friction and 2 places we want low friction?
High: driving, making a fire
Low: skating, skiing, sliding, sledding
Name and describe an example of static electricity.
Opposite charges (positive and negative) attract and cause a shock. ex. rubbing feet on carpet, balloon and hair, wool and salt/pepper
How can a human cause a landslide?
Humans can contribute to landslides when they build houses and change the natural land to build lawns, gardens and roads.
True or false: you can see the effect (result) of all forces.
True (you can see the force working through the movement or lack of movement)
Rubbing your feet on a carpet causes what force?
Static Electricity
Explain how static electricity works.
When objects rub against each other, their atoms become charged. One will be positive and one will be negative.
Items with different charges (positive and negative) will pull toward each other, while items with similar charges (e.g. positive and positive) will push away from each other.
Name and describe an example of buoyancy.
The force of gravity (air) pushes you down but the force of water pushes against it to help you float. Ex. boat, wood
How can a volcano affect the environment and people?
Ruins soil, smoke in air is harmful for animals to breath, burns animals, plants, destroys habitats/houses
Look at the two pictures. Name 2 things that affect the forces. Then explain the 3 forces shown in the picture.
The height of the canoe in the water.
The extra things in the canoe.
The actions of the people.
- The canoe has moved lower because there is more in it. This means that there is more gravity pushing down on the canoe. The force of buoyancy pushes the canoe back up
- In the top picture the people are rowing, which applies a muscular force on the water, which will push the canoe forwards. In the second picture they are not rowing, so the boat would be staying still.