Benchmark Review

Which of the following occurs when a liquid becomes a gas?

• The particles give off energy

• The particles slow down

• the particles move closer together

At higher temperatures___________.

• gas particles bump into walls less often

• particles in an object move faster

• particles have less energy

In a solid, the particles________

• vibrate in place

• overcome the strong attraction between them

• slide past one another

Why would dissolving salt in water be considered a physical change?

• The salt disappears forever

• the water tastes salty

• the salt changes its state

What is the process of obtaining information through the senses?

• measurement

• observation

• chemistry

What is a theory or explanation that is based on observations and that can be tested?

• a conclusion

• an observation

• a hypothesis

Which of the following is the most important part of gathering knowledge

in science?

• looking up answers on the internet

• asking questions

• being lucky

At the end of an experiment, what must you draw?

• bar graph

• chart

• conclusion

A negatively charged particle is a (an)_________.

• compound

• element

• electron

The number beneath carbon on the periodic table indicates__________.

• atomic mass

• element name

• atomic number