Quiz about Unit 2 Assessment 2 Review

Question 1

An electron has a negative charge represented by -1. An atom with a charge is called an ion.

If an ion has a charge of +6, how many electrons need to be added to the ion in order to have a charge of 0.

Accepted Answer

6 electrons

Answer

0 electrons

Answer

3 electrons

Answer

12 electrons

Question 2

Lars keeps track of his finances by recording his income and expenses in his checkbook. Which amount should Lars record as a negative number?

Accepted Answer

his rent payment

Answer

his weekly salary

Answer

a gift card from his aunt

Answer

a bonus he receives from work

Question 3

Decibels measure the volume of sound relative to the recording level. The table shows some decibel levels and their volume. What does a volume of 0 decibels mean?

Accepted Answer

There was no change in volume from the recording.

Answer

The volume is quieter than the recording.

Answer

The volume is louder than the recording.

Answer

The volume compared to the recording level cannot be determined.

Question 4

The elevations, in feet, of 3 cities are marked on the number line shown below. The ZERO on the number line represents sea level. Which statement must be true?

Accepted Answer

City P is above sea level and City R is below sea level.

Answer

City P and City Q are above sea level.

Answer

City Q and City R are below sea level.

Answer

City P is above sea level and City Q is below sea level.

Question 5

Students in a sixth grade social studies class are studying different elevations of cities in the United States. Some cities are below sea level, some are above sea level, and some are at sea level.

Which integer would represent a city that is at sea level?

Accepted Answer

0

Answer

-2

Answer

-1

Answer

1

Question 6

Which number is its own opposite?

Accepted Answer

0

Answer

1

Answer

-1

Answer

-2

Question 7

Which quantities are located to the RIGHT of the zero on a number line? Select TWO

Accepted Answer

-(-7)

Accepted Answer

-(-8)

Answer

-(4)

Answer

-3.5

Answer

- $$\left(\frac{1}{2}\right)$$

Question 8

Which of the following shows how you could write "the opposite of opposite nine"?

Accepted Answer

-(-9)

Answer

-9

Answer

$$-\left|9\right|$$

Answer

-(9)

Question 9

Which point represents the opposite of $$-\frac{3}{4}$$ on the number line?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 10

A number line is shown.

If Jason plotted -6 to the left of the zero, which numbers are located on the opposite side of zero? Select TWO.

A

Accepted Answer

3

Accepted Answer

-(-2)

Answer

-1

Answer

0

Answer

the opposite of 7

Question 11

Which number best represents the location of point E on the number line?

Accepted Answer

$$-1\frac{3}{5}$$

Answer

$$-1\frac{4}{5}$$

Answer

$$-1\frac{1}{2}$$

Answer

$$-1\frac{2}{5}$$

Question 12

A student studies the number set shown and then places each number as a point on a number line oriented from left to right. Which option below shows the following rational numbers in order from least to greatest?

Accepted Answer

Question 13

Review the numbers listed in the picture.

Accepted Answer

Question 14

The value -5 ______ -9 because -9 is located to the ____ of -5 on the number line.

Accepted Answer

>

Accepted Answer

left

Answer

<

Answer

=

Answer

right

Question 15

Keith wants to plot -8 and -9 on a number line. Which statement is true?

Accepted Answer

Keith should plot -9 to the left of -8 because -9 < -8.

Answer

Keith should plot -8 to the left of -9 because -8 < -9.

Answer

Keith should plot -8 to the left of -9 because -8 > -9.

Answer

Keith should plot -9 to the left of -8 because -9 > -8.

Question 16

On a day in the month of February, the temperature in Barrow, Alaska is -21 F. At the same time, the temperature in Northway, Alaska, is -13 F.

Which city's temperature is warmer?

Accepted Answer

Since -21 < -13, the temperature in Northway is warmer.

Answer

Since -21 < -13, the temperature in Barrow is warmer.

Answer

Since -21 > -13, the temperature in Barrow is warmer.

Answer

Since -21 > -13, the temperature in Northway is warmer.

Question 17

A roller coaster starts from rest at ground level and descends 5 feet into an underground tunnel. The roller coaster returns to ground level and then goes up a 20-foot hill. Which inequality correctly compares the elevations of the roller coaster in the underground tunnel and at the top of the hill?

Accepted Answer

-5 < 20

Answer

-5 > 0

Answer

5 > 0

Answer

5 < 20

Question 18

A meteorologist records the temperatures throughout the day in Chicago, Illinois. The table shows the different temperatures.

Which statement compares the temperature at 8:00 am to the temperature at 8:00 pm correctly?

Accepted Answer

The temperature at 8:00 pm is greater than the temperature at 8:00 am because 15 is farther to the right on a horizontal number line than -12.

Answer

The temperature at 8:00 pm is greater than the temperature at 8:00 am because 15 is farther to the left on a horizontal number line than -12.

Answer

The temperature at 8:00 pm is less than the temperature at 8:00 am because 15 is farther to the left on a horizontal number line than -12

Answer

The temperature at 8:00 pm is less than the temperature at 8:00 am because 15 is farther to the right on a horizontal number line than -12.

Question 19

A meteorologist records the temperatures throughout the day in Chicago, Illinois. The table shows the different temperatures.

At what time is the temperature the coldest?

Accepted Answer

5:00 am

Answer

8:00 am

Answer

5:00 pm

Answer

8:00 pm

Question 20

Which equation represents a true statement?

Accepted Answer

$$-\left|-6\right|=-6$$

Answer

$$\left|6\right|=-6$$

Answer

$$-\left|6\right|=6$$

Answer

$$\left|-6\right|=-6$$

Question 21

Consider the number: $$-\left(-\frac{3}{4}\right)$$

What is the distance from this number to zero on a number line?

Accepted Answer

$$\frac{3}{4}$$

Answer

$$-\ \frac{4}{3}$$

Answer

$$-\ \frac{3}{4}$$

Answer

$$\frac{4}{3}$$

Question 22

Which statement is true about -12 and -6?

Accepted Answer

The distance of -12 from 0 is greater than the distance of -6 from 0 because -12 is located to the left of -6 on the number line.

Answer

The distance of -12 from 0 is greater than the distance of -6 from 0 because -12 is located to the right of -6 on the number line.

Answer

The distance of -6 from 0 is greater than the distance of -12 from 0 because -6 is located to the right of -12 on the number line.

Answer

The distance of -6 from 0 is greater than the distance of -12 from 0 because -6 is located to the left of -12 on the number line.

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