Experiments
What is an experiment?
An experiment is a procedure done under controlled conditions to test a hypothesis.
What is weight measured in?
Weight can be measured in newtons, kilograms, or pounds.
What is the formula for density?
The formula for density is is mass divided by volume.
What is the first step on the engineering design process?
The first step of the engineering design process is that the engineer must identify a need.
What is matter?
Matter is anything that has mass and takes up space.
What is the difference between an independent variable and a dependent variable?
The difference between an independent variable and a dependent variable is that an independent variable is manipulated intentionally and a dependent variable is changed by the independent variable.
Why is the weight of a person on Earth weigh more than a person on the moon?
The reason why someone weighs less on the moon is because weight depends on gravitational force and there is stronger gravity on Earth than there is on the moon.
How do know something will sink in water just by knowing its density?
You will know if the density of the object is greater than one it will sink in water, if it has less than one it will float.
What is a trade-off?
A trade-off is when an engineer gives up one advantage for another more important one.
How can you find the volume of a irregular shape?
You can find the volume by using water displacement which means you put the object in a graduated cylinder and use this formula. 1 cc = 1 mL.
What must a hypothesis be?
A hypothesis must be testable and must be falsifiable.
On what device is weight measured?
Weight is measured on a spring scale or a triple beam balance.
How do you know that something will be air born just by knowing its density?
You will know if the object such as a balloon will stay in the air when its density is less than the air around it.
What are the five skills that a engineer needs?
The five skills are methodological thinking, using math and models, and creative thinking.
What are some examples of things that aren't matter?
Some things that aren't matter are sunlight and sound.
Where might scientist do there experiments?
A scientist may do their experiments in the field or in the lab.
Whats the difference between mass and weight?
The difference between mass and weight is that weight changes depending on where you are and mass doesn't change depending on where you are.
What is density?
Density is the amount of mass in the volume of a object and how tightly the molecules are packed together.
How can technology be used in the engineering design process?
Technology can be used to test and design products.
What is the formula for volume?
The formula of volume is length x width x height.
How does a scientist make observations?
A scientist makes observations by using there five senses see, feel, taste, touch, and smell.
What makes and object weigh as much as it does?
The thing that makes and object weigh as much as it does is gravitational force which is how much force that object is pushing down.
How can density change?
Density can change if the volume of an object changes like if it gets bigger or smaller.
What is an example of an engineer using a model?
An example would if the engineer wanted to show a prototype without actually building one.
Can two objects occupy the same space why or why not?
They both can't because each has its separate volumes and they both can't take up the same space. Although in some cases two volumes add up and fit in one area.