Physical Science Midterm Test

In a laboratory, the following should not be worn:

• Loose clothing

• Dangling jewelry

• Sandals

• All of the above

If a laboratory fire erupts, immediately

• Throw water on the fire

• Open the window

• Run for the fire extinguisher

• Notify your instructor

Long hair in the laboratory must be

• Cut short

• Held away from the experiment with one hand

• Always neatly groomed

• Pulled back and kept entirely out of the way

Horseplay or practical jokes in the lab are

• Always against the rules

• Okay

• Not dangerous

• Okay if you are working alone

You have been injured in the lab (cut, burn, etc.). First, you should:

• Tell your lab instructor

• Go to a doctor

• See the nurse after class

• Apply first aid yourself

How many kg are in 1,640 g? Note: 1 kg = 1,000 g

• 16.4 kg

• 1.64 g

• 1.64 kg

• 1,640,000 kg

What is the purpose of the lab equipment shown below?

• Measures volumes of liquids

• Holds solids or liquids that will nor release gas when heated

• Move beakers containing how liquids

• Holding and organizing test tubes

What is the purpose of the lab equipment shown below? *Tongs*

• Measures volumes of liquids

• Holds solids or liquids that will not release gas when heated

• Move beakers containing hot liquids

• Holding and organizing test tubes

Which of the following is the correct scientific notation form of 450,000 to the correct amount of significant figures?

• 4.5 x 10⁶

• 4.50000 x 10⁵

• 4.5 x 10⁵

• 4.5 x 10^-5

Which of the following is the correct standard form of 6.32 x 10^-5?

• 0.000632

• 0.0000632

• 632,000

• 63,200