Forces and Motion
These can cause changes in motion
What are forces
A stiff bar that moves about a fixed point (fulcrum)
What is a lever?
A wheel that has a rope wrapped around it.
What is a Pulley?
How do we describe a substance that is evenly distributed throughout another substance?
What is dissolved?
This word describes a group of organisms of the same kind that live in the same place.
What is a population?
This is the pulling force that pulls objects towards Earth.
What is gravity
It is wide at one end and pointed at the other.
What is a wedge?
Roller skates or a doorknob is an example of this simple machine.
What is a solution?
This word describes an impression of an organism in a petrified form or as a mold in rock.
What is a fossil?
This is a force that works against the motion of an object, causing the object to slow down and/or stop.
What is friction?
What is Wheel and Axle?
This simple machine is used to lift heavy objects by changing the direction or amount of force.
What is a Pulley?
Solids will dissolve faster in this temperature water.
What is hot or warm water?
This is a scientist who uses fossils to learn about life and conditions of the past.
Who is a paleontologist?
These are the two main types of forces.
What are pushes and pulls?
A flat surface that is raised so that one end is higher than the other.
An example of this simple machine is a knife or an ax.
What is a Wedge?
This has less energy than hot water.
What is cold water?
As environments change, populations must do this in order to survive.
What is adapt?
These are invisible forces.
What are gravity and friction?
An Inclined Plane wrapped around a cylinder or cone
What is a Screw?
An example of this simple machine is a ramp.
What is an inclined plane?
Materials that hold their shape.
What are solids?
These life needs must be met in order for a population to survive.