Force and Motion
A push or pull of an object
Force
Heat movement through electromagnetic waves (think the sun... a campfire)
Anything that has mass and takes up space
Matter
Rain, snow, sleet, or hail from the clouds
Precipitation
An increase in heavy clouds would most likely result in which process?
Precipitation
The distance an object moves in a given amount of time (distance/time)
Speed
A material that does not allow heat to pass through easily (wood, plastic)
Insulator
A change that does not result in new substance
Physical Change
Water vapor turns to liquid, forms clouds
Condensation
Give an example of a chemical change
Answers will vary, use your personal judgement
A force that slows down a moving object when it rubs against another object
Friction
Heat movement through direct touch (contact)
A change that does result in a new substance being formed.
Chemical Change
Water that drains freely on the surface of Earth
Run-off
Kim lost her hammer outside. When she found it a few months later, some parts of the metal were covered with flaky, brown rust. Which type of change occurred when rust formed on the hammer?
the forces acting on an object that are equal in size and opposite in direction, canceling each other out, no movement of object
Balanced Forces
Heat movement through liquid and gas (heat rising, cool air sinking)
Convection
A mix of 2 or more substances that do not result in a new substance (think trail mix)
Mixture
The process in which water changes states, makes fresh H2O
The Water Cycle
Evaporation is the first step in the water cycle. What gives water the energy to evaporate?
The sun
An object at rest remains at rest until what happens?
A force acts upon it
On a hot day in the sun, why does Robert use a foam can holder to keep his drink cool?
Foam insulates the cold drink
A mix of 2 or more substances that form a new substance (think slime)
Solution
Plants (vegetation) release H2O when heated by the sun
Transpiration
Give an example of a physical change
Answers will vary, use your personal judgement