Physical Science Quiz 1

( Fill in the blank) Long hair should be ____________ in the laboratory.

• tied back

• cut

• down

• curled

(True or False) Horse playing is allowed in the laboratory

• true

• false

(True or False) It is okay to pick up broken glass with your bare hands as long as the glass is placed in the trash can

• true

• false

You are heating a substance in a test tube. Always point the open end of the tube

• towards your body
• toward your lab partner
• towards another classmate
• away from all people

The proper technique for smelling chemicals is ______________

• keeping your nose close to the glassware
• wafting
• to sniff only a small amount
• Trick question; you never are allowed to smell chemicals in class

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control
• Compound

Research Question: Does the type of gasoline put in a car effect how fast the car can drive. What is the independent variable?

• Type of gasoline
• which car the gas is put into
• how fast the car can drive
• how much gas is put into the car

On a graph, which axis shows the dependent variable?

• x-axis
• y-axis
• neither
• it changes

On a graph, which axis shows the independent variable?

• x-axis
• y-axis
• neither
• it changes

How many independent variables can be tested in a controlled experiment?

• one
• two
• three
• as many as possible