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A pH indicator
A pH meter
You weigh it.
A Scientist would use a balance, either triple-beam or electronic.
Scientist test this by measuring the radioactive decay of Carbon 14 to Nitrogen 14. Good for up to 70,000 years. Since you didn't specify, scientists also measure dead people by liver temperature to figure out how long they have been dead.
It is an approximate measure of elasticity.It is an approximate measure of elasticity.It is an approximate measure of elasticity.It is an approximate measure of elasticity.
A pH indicator
Most people just measure the circumference and divide by 3.14 (approximate pi) to find the (approximate) diameter.
Observes and measure
the rictor scale
to measure
To measure temperature, scientists use:KelvinCelsiusFahrenheit.
100
A thermometer.
volume
Optomotrists
measuring bowls