Observations & Inferences
What is an observation?
Using your five senses to notice something.
Which tool is used to measure length?
Ruler or meter stick.
What is the formula for density?
Density = Mass ÷ Volume.
At what phase of matter is water most dense?
When it is liquid.
If temperature increases, what usually happens to density?
Density decreases.
What is an inference?
An explanation or conclusion based on an observation.
Which tool is used to measure mass?
Triple beam balance or scale
A rock has a mass of 240 g and a volume of 12 cm³. What is its density?
20 g/cm³.
If an object’s density is greater than 1.0 g/mL, will it float or sink in water?
It will sink.
As pressure increases, what happens to density?
Density increases.
Give one example of an observation.
Example: “It is raining outside.”
Which tool is used to measure liquid volume?
Graduated cylinder.
A rock has a mass of 40 g and a density of 8 g/cm³. What is its volume?
5 cm³
If an object’s density is less than 1.0 g/mL, what happens?
It floats.
What type of relationship is “As pressure increases, density increases”?
Direct relationship.
Give one example of an inference.
Example: “The ground will be wet because it is raining.”
Which tool is used to measure temperature?
Thermometer.
Name one factor that does not change density.
Size or shape of the sample.
Why does ice float on liquid water?
Ice is less dense than liquid water.
Why does a person weigh less on the Moon than on Earth?
The Moon has less gravity.