Understanding the Number Line

Q.

Can distance be negative?

Q. A helicopter is flying at 40 feet above the sea level and a submarine is at 60 feet below the sea level. On the number line, the helicopter is at ft from the sea level and submarine is at ft from the sea level.

Q. When we add a positive number, we move in direction on a number line. When we add a negative number, we move in direction on a number line.

1. Right or left
2. both right and left
3. the right
4. the left

Q.

Add the following numbers using the number line.

$(-2)+(+4)$

Q. On a horizontal number line, negative numbers are located on the right side of $0$.

1. True
2. False

Q.

Use integers to describe each idea .

Sea level.

Q.

A place is $37m$ above sea level and another is $35m$below sea level. What is the difference of level between the two places?

Q.

Distance is the _________ path followed by a body between two points.

Q.

A driver is at a depth of $8m$ below sea level and a balloon is at a height of $8m$ above sea level. Which is closer to sea level?

Q.

Write opposite of $70m$ above sea level.

Q.

A submarine is at a depth of $8m$ below sea level, a diver at a depth of $5m$below sea level and a helicopter at a height of $100m$ above sea level. Which of the following is in between the other two?

1. Submarine

2. Diver

3. Helicopter

4. None

Q. The diagram shows a flood warning post in a river. Identify the water level shown in the diagram in cm.

1. -20

Q. On the number line, the number of integers are

1. $7$
2. Finite
3. Infinitely many
4. None of the above

Q. The value of numbers decreases as we move to the left of a number line, whereas, the value increases as we move to the right.

1. True
2. False

Q. On a number line, what number will be $3$ units left of $0?$

1. $3$
2. $-3$
3. $6$
4. $-6$

Q. Following is the list of temperatures in five places in India, on a particular day of the year.
Place Temperature
Siachen ${10}^{\circ }Cbelow{0}^{\circ }C$
Shimla $2^{\circ }Cbelow{0}^{\circ }C$
Ahmedabad ${30}^{\circ }Cabove{0}^{\circ }C$
Delhi ${20}^{\circ }Cabove{0}^{\circ }C$
Srinagar $5^{\circ }Cbelow{0}^{\circ }C$

Plot the name of the place against its temperature.

Q. Where does $‘‘0"$ appear on the number line?

1. At the center
2. In the side of negative integers
3. In the side of positive integers
4. None of the above

Q. The term 'distance' refers to how far an object moves regardless of direction. It is always positive.

1. False
2. True

Q. On a number line, the number, which is $5$ units right of $-2$ is .

Q. An ant covers $1$ unit distance on the number line in $1$ minute. How much time the ant will take to cover from $-4$ to $3?$

1. $3$ minutes
2. $4$ minutes
3. $7$ minutes
4. None of the above

Q.

Distance has both magnitude and direction.

1. True
2. False