Measurement
In a laboratory, which tool is used to measure the volume of liquids?
Beaker
Which of the following is an example of a chemical change?
Burning wood
Which state of matter has a definite volume but no definite shape?
liquid
Can a mixture can be physically separated?
Yes
What is the main purpose of a laboratory scale?
To measure mass
What is a key characteristic of a chemical change?
Formation of a new substance
What is the primary characteristic of particles in a solid state?
They are tightly packed and vibrate in place
What is the main difference between a mixture and a compound?
Mixtures can be separated by physical means, compounds cannot.
Fill in the blank: In a laboratory, scales are used to measure differences in the __ of objects.
mass
Hard-boiled eggs are the result of a chemical change because:
the eggs have different properties (smell, taste, color) before vs after.
What happens to the portion of water that disappears from a beaker when it is boiled and the container does not have a lid?
evaporates
Which method is commonly used to separate a mixture of sand and water?
Filtering
What happens to the mass of a substance when it undergoes a phase change from liquid to gas?
It remains the same
What is the process called when a liquid turns into a solid?
Freezing
Which state of matter has neither a definite shape nor a definite volume?
Gas
Does the mass after a physical change, such as ice melting into water, stays the same?
Yes
When measuring water mass the unit is:
grams
Which of the following is NOT a sign of a chemical change?
Change in volume
Which instrument is commonly used to measure the temperature of a liquid in a laboratory?
Thermometer
During an experiment, you collect and record your measurement data. At the end of the week, the mass of the water has __.
decreased