# Principles of Technology - Semester Exam Review Key

## 26 terms

### Pointed away from yourself and others

The correct way to hold a test tube while heating its contents is

### tied back

You are going to be working with different chemicals and the Bunsen Burner during
the lab tomorrow. Your long hair will needs to be

### Inform the teacher and follow his/her instructions

If you smell a gas leak in the laboratory, you should

### Dispose of materials according to your teacher's instructions, wipe up your work area, wash your hands, and return to your seat to complete your conclusions

After you've completed your lab activity, you should

### Goggles are required when working with

fire, chemicals, hot plate, or glassware.

### You have a beaker of sulfuric acid and wonder what it smells like. You should

Inform the teacher and follow his/her instruction about how to test the odor

### 1 mL

When measuring a liquid's volume which will give greater precision a graduated cylinder with increments of 1 mL or increments of 2 mL?

### Increase in growth, speed,

Which of these can be tested through experimentation?

### Greatest-L Stopped-M Slowest-O

The graph shows the distance traveled by a vehicle over a certain period of time.
Which segment of the graph shows the vehicle moving with the greatest speed,
stopped, and the slowest speed?

### How the type of material affects rebound height

In an activity, a ball is dropped from a height of 100 cm onto five different materials.
The rebound height of each drop is shown in the graph. What is the hypothesis that
is most likely being tested?

### 2.4g

1 gram equals 1000 milligrams. How many grams equal 2400 milligrams?

### .750L

A coke has 750mL of liquid in it. What is this in liters?

### independent

The variable that is always plotted on the X-axis is the

### dependent

The variable that is always plotted on the Y-axis is the

### procedure

The steps used to conduct an experiment are called

### mechanical system

uses gears, chains, levers, to transmit forces.

### force

is a push or a pull.

### Newton

is the amount of force required to give a 1-kg mass an
acceleration of 1 m/s2.

### Weight

is the force caused by the Earth's gravity and is directed downward.

### Weight

depends on location above the earth's center.

### Mass

is the amount of matter in an object.

### Vectors

have both direction and magnitude and are drawn as arrows.

### Balanced

forces are EQUAL and OPPOSITE in direction.

### Magnitude

is the numerical value of a vector.

### Unbalanced

forces are not equal and will cause a change in the
motion of an object.

### Equilibrium

is when all the forces are balanced on an object.