Variables
What variable changes the independent variable?
the dependent variable
Is everything matter?
No, light and sound are not.
How do you find density?
mass/volume
1m=__ cm
1 m=100 cm
What is technology?
It is an Application of science for practical purposes.
What determines data?
The independent variable and the dependent variable.
What does matter make?
Matter makes everything except light and sound
Does everything have density?
everything in the universe has density because everything is made up of matter
What are the units in length?
Give 2 examples of technology in the past.
Spears and the process of growing food,
What is an independent variable?
A factor that is deliberately manipulated
Anything that has mass and takes up space is?
Matter
Will an object float if the density of the object is 1.1 and the water's density is 1.0?
No, the object will sink because 1.1 is greater than 1.0
What is the basic unit of length?
The basic unit of length is meters
What else does technology do besides identifying a need?
It also organizes, designs, and plans complex projects.
Why do scientists need to decide if the independent variable is changed or not?
because data is determined by the relationship between the independent variable and the dependent variable.
how can you tell if something is matter
If it has mass and volume, it has matter
What does density really tell you?
It tells you the relationship between mass and volume.
Do you ever use inches to measure length?
NO, you NEVER measure length with inches.
What does technology need to identify?
It needs to identify the need and then meed the need.
What do scientists do to not affect the result?
They try not to change other variables
Is sound through air matter?
Sound through air does not count as matter.
How does liquid density affect if the object sinks or floats?
The liquid density affects if the object sinks or floats because the density of the object may become lighter than the water's density
1 km= __ cm
1 km= 100,000 cm
Is all technology simple?
No, some technology is complicated. (ex. mp3 player)