Laboratory Techniques and Skills

What is the purpose of using a glass stir rod when pouring liquids?

• To heat the liquid

• To minimize dripping and spills

• To measure the liquid's temperature

• To make the liquid change color

What does it mean when the pointer is ABOVE the middle mark?

• You have to add MORE mass.

• You have too much mass and need to reduce it.

• Your object needs to be moved in the pan.

• You need to tare the balance.

How does mass differ from weight?

• Mass is measured in liters, weight in grams

• Mass is the amount of matter, weight is the force of gravity

• Mass is the same as weight

• Mass changes with location, weight does not

What is the first step in using a triple beam balance?

• Add the mass of the object

• Look at the meniscus

• Move all sliders to zero

• Place the object on the pan

Where would you find the units of measure for a graduated cylinder?

• Along the bottom of the cylinder

• Along the top of the cylinder

• Along the base of the cylinder

• Under the base of the cylinder

If I need to measure the mass of an object, I would use a

• stirring rod

• beaker

• triple beam balance

• graduated cylinder

If I need to measure the volume of a liquid, I would use a

• stirring rod

• beaker

• triple beam balance

• graduated cylinder

When measuring liquid in a graduated cylinder, where should you look?

• At the bottom of the cylinder

• At the side of the cylinder

• At the top of the liquid

• At the bottom of the meniscus

How do you determine the value of each graduation on a graduated cylinder?

• By measuring the cylinder's height

• By guessing

• By dividing the difference between two numbers by the number of lines

• By looking at the color of the liquid

Matter is anything that

• Has mass and occupies space.

• exists.

• you can observe.

• can be weighed.