Hoi Flashcards
(31 cards)
What is a controlled variable?
It is a variable that stays the same throughout the whole experient.
What is the independent variable?
It is the changing variable in the experiment. There should only be 1.
What is the dependent variable?
It is the variable that is being measured.
What is a meniscus?
It’s the curved shape formed by the surface of a liquid when it is in contact with another surface.
What is a force multiplier?
Help increase the size of a force applied to do a job.
What is a speed multiplier?
Helps increase the speed, or distance travelled by, of an object.
What is a inference?
An inference is a logical explanation on what may have happened
What is a prediction?
It is an educated guess on what will happen.
Mechanical advantage for a ramp
Is length of slope divided by height of slope.
Mechanical Advantage for Levers
Is the distance from effort to fulcrum divided by distance from load to fulcrum.
What is inertia?
Is the tendency to resist change in motion.
What is friction?
It is a contact force, and happens when an object slides or rolls over a surface.
What is Gravity?
It makes things fall down and pulls objects to the center of the earth.
Fill the gaps:
The more _____ an object has, the stronger the _________ is.
Mass, pulling force.
Mass is:
The amount of matter in an object.
Weight is:
The pulling force of gravity.
A force can:
Be a push, pull or twist. It can change an objects shape or direction.
What is a colloid?
It is a mixture where small particles of one substance are spread evenly through another substance.
Where is the crumple zone?
On the front and back of the car. It protects the safety shell.
What is a pulley?
It is a wheel with a groove around it so a rope or chain can move.
What is a colloid that has a solid spread through a liquid
Sols
Emulsions are:
particles of a liquid spread through a liquid.
Chromatography is:
Separating a mixture by making it move through another substance.
In a practical report, when do you state your guess on what will happen?
It’s the second thing (the hypothesis) and it happens after the Aim.
