Water Cycle
What is the water cycle?
The Water Cycle (also known as the hydrologic cycle) is the journey water takes as it circulates from the land to the sky and back again.
What is a distance-time graph?
It shows an object’s motion over a given distance.
It shows how long it takes an object to travel a certain distance!
True or False
Balanced forces don’t change motion
TRUE
What is Newton's First Law?
An object in motion will stay in motion and an object at rest will stay at rest UNLESS acted upon by an unbalanced force.
What is physical change?
A physical change is when matter changes its property but not its chemical nature. The substance remains the SAME.
What is it called when the sun heats up a collection of water, it turns into vapor or steam as it rises into the air.
a. evaporation
b. transpiration
c. condensation
d. precipitation
a. evaporation
How do you calculate time? (What is the formula?)
Time = Distance ÷ Speed
When forces are unbalanced, what happens?
They change motion. Objects accelerate in the direction of the strong force.
What is INERTIA?
INERTIA = the tendency of an object to resist a change in motion.
Name at least 3 physical changes in matter
Change in Shape
Change in Texture
Change in Size
Dissolves
Breaks Apart
Mixture that does NOT cause a reaction
Name at least 3 collection points when water falls.
oceans, lakes, icebergs, puddles, rivers and streams.
Curved lines show if an object is ____________ or ___________!
Curved lines show if an object is accelerating or decelerating!
What is the difference between weight and mass?
Weight - Measure of the force of gravity on an object
Mass - Amount of matter something has
Weight is a force, mass is not
What is the difference between balanced and unbalanced forces?
unbalanced force = change in motion
balanced force = no change in motion
What is the difference between mixture and solution?
Mixture is a combination of 2 or more substances that keep their own properties.
Solutions is a mixture in which one substance dissolves in another.
What is a runoff?
After precipitation falls to Earth’s surface, water will flow down to a collection point. The force of gravity pulls water down to the lowest point.
What does it mean if a line on a graph is sloping DOWN?
This means that the objects changed direction and it is heading back to the starting point.
What affects air resistance?
Size, shape of object, and speed affect air resistance
What is Newton's Third Law?
For every action there is an equal and opposite reaction
What is a chemical change?
A chemical change in matter is when matter becomes something completely new. New matter is formed.
What is the energy source that drives the water cycle?
The sun
How fast was a car moving if it traveled 600 miles in 8 hours at a constant speed? (Speed = Distance ÷ Time)
a. 80 mph
b. 70 mph
c. 4800 mph
d. 75 mph
d. 75 mph
What is the difference between potential energy and kinetic energy?
Potential Energy - stored energy in an object that is ready to be used
Kinetic Energy - the energy an object has because of its motion
What is Newton's Second Law?
Describes the relationship between force, acceleration, and mass.
Force = mass X acceleration
F = m X a
Is mowing grass considered a chemical or physical change?
physical change