Measuring
Mass is usually measured in _______ and volume and capacity are usually measure in _______.
A. kilograms and grams, litres and millilitres
B. litres and millilitres, kilograms and grams
A. kilograms and grams, litres and millilitres
TRUE or FALSE: shape can impact whether or not an object floats or sinks.
TRUE
Some objects with the same mass will float when they are one shape, and sink when they are another.
The shape of a plane's wings creates _______, because air moves faster across the top of the wing.
A. Thrust
B. Drag
C. Lift
D. Gravity
C. Lift
Friction is a force that works _______ movement.
A. With
B. Against
C. Neither - friction isn't related to movement.
B. Against
Scales are used to determine the ______ of an object.
A. Volume
B. Mass
C. Capacity
D. Density
B. Mass
Density is calculated by taking the ______ of an object and dividing by it's ______.
Mass, volume
What part of a plane provides thrust?
The engine (remember: thrust is the force that moves the plane forward!).
Using rollers can make moving something ______ because it ______ friction.
A. Easier, increases
B. Easier, decreases
C. Harder, increases
D. Harder, decreases
B. Easier, decreases
What does capacity measure?
The amount of space inside a container.
What is buoyancy?
The force that stops objects from sinking.
What are the four main forces that affect whether or not a plane can fly?
Lift, gravity, thrust, and drag
What is rolling friction?
When a round object (like a cylinder or wheel) rolls over a surface.