Forces
What force pulls objects towards Earth?
Gravity
What tool is used to measure force?
Spring balance
Which variable is changed on purpose?
Independent variable.
What is the capital city of Australia?
Canberra
What has hands but can't clap?
A clock.
What is a force?
A push or a pull.
Which simple machine would make it easiest to move a piano into a truck?
Ramp
Name the three types of variables.
Independent, dependent and control.
How many days are in a leap year?
366
The more you take away, the bigger I become.
A hole.
Name one contact force.
Friction, normal/support force, tension, air resistance or applied force.
Which simple machine would be best for lifting a heavy bucket from a well?
Pulley
What section of a report predicts the outcome?
Hypothesis
Only mammal that can truly fly?
Bat
What has keys but can't open locks?
Piano
A parachute slows a skydiver by increasing what force?
Air resistance.
Name three simple machines.
Any three of:
Repeating trials improves what aspect of an investigation?
Reliability
How many hearts does an octopus have?
3
What gets wetter the more it dries?
A towel
A student pushes a box with a force of 40 N to the right. Friction acts with a force of 25 N to the left.
What is the net force? (and direction!)
15 N to the right
Two ramps reach the same height. Ramp A is 2 m long and Ramp B is 4 m long. Which ramp requires less force to push a box up?
Ramp B.
Keeping control variables the same improves what aspect of an investigation?
Validity
Which animal lays the largest eggs in the world?
Ostrich
What disappears as soon as you say its name?
Silence