Vocabulary
What is a force?
a push or a pull on an object
What is a mixture?
combination of two different substances that CAN be separated easily
What is a solution?
What tool is used to calculate force?
spring scale
What does it mean to be a balanced force?
There's the same force being applied so there's NO MOTION/MOVEMENT
What is friction?
a force that slows something down when it's rubbed against something
What is an example of a mixture in real life?
trail mix, cereal, rocks and pebbles, etc.
Which of these are considered solutions?
a. lemonade
b. koolaid
c. salt water
d. all of the above
ALL OF THE ABOVE
What is the unit for force?
Newtons
What does it mean to have an unbalanced force?
There's different forces being applied from each side and there IS MOTION/MOVEMENT towards the side pushing/pulling with more force
What is gravity?
the force that is ALWAYS acting on us and pulls us towards the Earth
How do I separate a mixture of water and salt water?
Boil it to evaporate the water
What is the ability of a substance to dissolve in a liquid?
solubility
What kind of experiment would test the effect of friction?
a. dropping two balls from the same height
b. sliding a marble on different types of surfaces
c. sliding a car down a ramp at different heights
d. throwing different sized balls through the air
B. sliding a marble on different types of surfaces
If a soccer ball is moving, the forces must be -
unbalanced
What is Magnetism?
the force that is attracted between metals and magnets
A student is given a mixture of pebbles and sand. How can he separate the mixture?
sieve, sifter, colander, screen or strainer
When salt dissolves into water, what physical property changes?
the shape or size of the salt crystals
When the force of friction is greater, the object would most likely...
a. slow down
b. speed up
c. stay the same
d. have no affect
A. slow down
If the pencil is sitting still on the table, the forces must be -
balanced
Pull means it goes ...
Push means it goes ...
Pull comes towards you and a push goes away from you
In a mixture, what happens to the properties of the items that are mixed together?
they keep the same properties because there's no chemical change
What is the difference between a solvent and a solute?
Solvent - what is doing the dissolving
Solute - what is getting dissolved
What material would cause the greatest amount of friction?
a. tile
b. carpet
c. sand paper
d. wood
c. sand paper
If I'm playing tug of war and the we seem to be at a stand still, where both teams cannot move the rope, what is happening?
balanced forces from each team