Phy Science Unit 1 Summative Review

Chem - Unit 1 Review

​Items

R

1. ​Scientific Method - Independent & Dependent Variables

2. Scientific Notation

3. Significant Figures

4. Metric System

5. Distance & Displacement, Speed & Velocity

6. Momentum and acceleration​

Some text here about the topic of discussion

Multiple Choice

In an experiment to find out how the temperature affects the bounce height of a ball, the dependent variable is ...

• temperature
• bounce height
• the thermometer
• the ruler

Multiple Choice

The one variable in an experiment that is purposely changed and tested by the scientist is the________________.

• dependent variable

• independent variable

• data

• control group

Multiple Choice

Research Question: Does the type of gasoline put in a car affect 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

Multiple Choice

If I study for my scientific method quiz, then I will have a better test score. What is the dependent variable?

• Scientific Method
• Studying
• Independent variable
• Test score

Multiple Choice

The variable the is changed on purpose is..

• Constant
• Control
• Independent Variable
• Dependent Variable

Multiple Choice

The variable that is being tested, counted, or measured and is responding to the independent variable is known as 

• Control
• Constant
• Independent Variable
• Dependent Variable

Multiple Choice

Which brand of paper towel will absorb the most liquid? What is the independent variable?

• Brand of paper towel
• Amount of water absorbed

Multiple Choice

Change from standard form to scientific notation: 12,000,000

• 12.0  x  10⁷
• 0.12  x  10⁷
• 1.2  x  10⁶
• 1.2  x  10⁷

Multiple Choice

Change from standard form to scientific notation: 0.004078

• 4.078  x  10^-3
• 4.078  x  10³
• 40.78  x  10^-4
• .4078  x  10^-2

Multiple Choice

Try to change the number back to standard form: 3.97  x  10^-2

• 0.000397
• 0.0397
• 0.0000397
• 0.397

​Significant Figures Rules

​1. All non-zero numbers ARE significant​

2.​Zero's on the Left (leading) NOT signifcant

3. Zero's in middle - ARE significant

4. Zeros at the end.....Depends

1. If there is a decimal - YES the ARE

2. No decimal - NO, not significant​

Subject | Subject

Some text here about the topic of discussion

Multiple Choice

How many significant figures?

7945

• 1

• 2

• 3

• 4

Multiple Choice

How many significant figures?

76400.0

• 3

• 4

• 5

• 6

Multiple Choice

How many significant figures?

76490

• 3

• 4

• 5

• 6

Multiple Choice

How many sig. fig. are in the number below:
0.0005

• 1
• 2
• 3
• 4

Multiple Choice

Which measurement contains 3 sig figs?

• 200 mL
• 20.0 mL
• 0.02 mL
• 0.020mL

Multiple Choice

How many Significant Figures in the number below?
0.456

• 3
• 4
• 2
• 1

Multiple Choice

How many significant figures does 0.010 m have?

• 1
• 2
• 3
• 4

​Sig figs when multiplying/dividing

When multiplying or dividing, round your answer to the same place as the number with the LEAST amount of SIGNIFICANT FIGURES.

​47.06 x 1.0004 = 47.078824

​​47.06 x 1.0004 = 47.08

​98.04​ = 32.68

3​

​​98.04​ = 30

3​

Sig figs when adding/subtracting

When adding or subtracting, round your answer to the same place as the number with the LEAST amount of DECIMALS.

​45.879 + 32.1 = 77.979

​45.879 + 32.1 = 77.979​ ------> 78.0

​5.41 + 65.456 = 70.866

​​5.41 + 65.456 = 70.866 -------> 70.87

Multiple Choice

Which one is rounded correctly for the following equation?

1.987 - 0.48 = ?

• 1.5

• 1.51

• 1.507

• 2

Multiple Choice

Which one is rounded to the correct number of significant figures for the following equation?

7520 x 0.021 = 157.92

• 157.92

• 157.9

• 158

• 160

Multiple Choice

Which answer is rounded to the correct place for the equation below?

457.1 + 459.32 = 916.42

• 916.42

• 916.4

• 916.0

• 916

Multiple Choice

Which answer is rounded to the correct place for the equation below?

487.0 / .0024 = 121,750.0

• 121750.0

• 121800

• 122000

• 120000

Metric System

Base Units

• Volume = Liters = L

• Mass = Grams = g

• Length = meters = m

Prefixes

• The Metric system is based on multiples of tens.

Remember

• “King Henry Doesn’t (Usually) Drink Chocolate Milk”

Multiple Select

Which units below are NOT part of the metric system? Check all that apply.

• Inches

• Feet

• Meters

• Grams

Multiple Select

Which units are the BASE units in the metric system? Check all that apply.

• Meters

• Liters

• Grams

• Inches

• Miles

Multiple Choice

The Metric System is based on powers of:

• 5's

• 10's

• 20's

• 50's

Multiple Choice

The metric unit of measurement for length is ____________________. 

• Liter
• Meter
• gram
• inch

Multiple Choice

The metric unit of measurement for weight or mass is ________________.

• Gram
• Liter
• Pound
• Meter

Multiple Choice

The metric unit of measurement for capacity or volume is ________________.

• Gram
• Meter
• Liter
• Ounce

Converting Units

• Changing a Metric Units to another Metric Unit

• Moving BIG unit to small Multiply

• Moving small to BIG Divide

Multiple Choice

42 L = ? mL

• 4,200

• .0042

• 4.20

• 42,000

Multiple Choice

40 mL =  ? cL

• 400
• 4000
• 4
• 0.4

Multiple Choice

3 cm = ? mm

• 30

• 300

• 3000

• 0.3

Multiple Choice

400 cg = ? g

• 4
• 40
• 50
• 400

Multiple Choice

75.2 cm = ? m

• 0.752

• 7.52

• 75.2

• 752

Multiple Choice

Convert:

3 kg = ? g

• 3

• 30

• 300

• 3,000

Multiple Choice

6,000 mL = ? L

• 60

• 600

• 6

• 6,000

Distance vs Displacement

Distance

• Distance is the total length traveled by an object.

• This guy goes up 3m + right 5m + down 3m + left 5m

• Distance = 3m + 5m + 3m + 5m = 16m

Displacement

• Difference between start and finish

• In this example he starts at A and ends at A

• Because he hasn't gone anywhere his displacement is ZERO meters

Multiple Choice

If you walk 5 miles north, then 6 miles south, what is your distance traveled?

• 1

• 5

• 6

• 11

Multiple Choice

If you walk 5 miles north, then 6 miles south, what is your displacement?

• 1 south

• 5 north

• 6 south

• 11 east

Speed

​Some text here about the topic of discussion.

Velocity

​Velocity is calculated like speed. Just ADD a DIRECTION!!

Acceleration is measured in m/s²

Acceleration

Multiple Choice

Acceleration of an object happens when things ________

• slow down
• go faster
• change direction (turn)
• All of the above

Multiple Choice

Which two factors does speed depend on?

• distance and direction

• direction and time

• distance and time

• distance, time and direction

Multiple Choice

What two factors does velocity depend on?

• speed and direction

• distance and time

• speed and time

• distance and direction

Multiple Choice

Which is an example of velocity?

• A car driving 55 miles per hour south.

• A bicyclist traveling 10 meters per hour.

• A roller coaster is traveling 10 meters per second.

• A rocket blasting off at 2,500 meters per second.

Multiple Choice

What is your average speed if you take 0.5 h to jog 4,000 m?

• 8000 m/h
• 2000 m/h
• 0.000125 m/h
• 800 m/h

Multiple Choice

Which of the following is NOT an example of acceleration?

• a person jogging at 3 m/s along a winding path
• a car stopping at a stop sign
• a cheetah running 27 m/s east
• a plane taking off

Multiple Choice

When a car goes around a corner at 20 mph, why do we say it accelerates?

• The car is accelerating because of the velocity is constant

• The car accelerates because it's going 20 mph

• Cars always accelerate when they are in motion

• The car is accelerating because it's changing direction

Multiple Choice

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

• 10 m/s
• 1000 m/s
• 100 seconds
• 10 seconds

Multiple Choice

The turtle speeds up from 0m/s to 20m/s in 2 seconds. What is his acceleration?

• 40m/s^2

• 20m/s²

• 10m/s²

• 2m/s²