Mass and Weight
The amount of matter in an object.
What is mass?
The tool used to measure mass.
What is a scale?
Astronauts in orbit feel this because they are not pulled in one clear direction inside the spacecraft.
What is weightlessness?
A force can make an object do this if it is at rest.
What is start moving?
The upward force of water on an object.
What is upthrust?
The force of gravity acting on an object.
What is weight?
The tool used to measure weight.
What is a forcemeter?
The International Space Station stays around Earth because of this force.
What is gravity?
A force can do this to a moving object.
What is slow it down, stop it, or change its direction?
The downward force that pulls an object toward Earth.
What is gravity or weight?
Mass is measured in this unit.
What are kilograms or grams?
Scientifically, saying “The baby weighs 3.6 kg” is not correct because kilograms measure this.
What is mass?
Astronauts need these outside spacecraft so they do not float away.
What are handholds and footholds?
Pressing gently on the ping pong ball shows that a force can change this.
What is its shape?
An object floats if its mass is less than or equal to the mass of the ______ water.
What is displaced?
Weight is measured in this unit.
What are newtons?
On Earth, one kilogram has a weight of about this many newtons.
What is about 10 N?
Astronauts exercise every day to help keep these strong.
What are muscles and bones?
When the ball rolls across a cloth instead of a smooth table, this force is greater.
What is friction?
A container ship can float because it displaces a greater ______ of water.
What is mass?
If you go to the Moon, your mass stays the same, but your ______ changes.
What is weight?
If gravity gets smaller, weight gets ______.
What is smaller / less?
In the ISS, an astronaut’s mass is the same, but the astronaut’s weight is about this.
What is zero / almost zero?
List one of the five effects of forces taught in the book.
What is make an object move / slow it down / stop it / change direction / change shape?
Besides mass, this also affects whether an object floats or sinks.
What is shape?