Question

Fill in the blanks:
1. In ancient times,…….watch and………..watch were used to calculate time.
2. The time period between two new moon day is called …………..
3. The metal ball is known as ……….. of simple pendulum.
4. ………….is the international unit of speed.
5. The distance time graph for uniform speed is s ………….

Answer 1

Answer:

(1) sand, sun light

(2) lunar month

(3) ball

(4) Meter/ second

(5) Straight line

Explanation:

Fill in the blanks:

1. In ancient times,…sand….watch and…sun light……..watch were used to calculate time.

2. The time period between two new moon day is called ……lunar month……..

3. The metal ball is known as ………ball.. of a simple pendulum.

4. ……Meter/ second…….is the international unit of speed.

5. The distance-time graph for uniform speed is s …Straight-line……….

These all answer from Time and distance chapter.

Answer 2

sundial and sand clock; lunar month; bob; meters per second; straight line

Explanation:

1. In ancient times, sundial and sand clock were used to calculate time.

2. The time period between two new moon day is called a lunar month.

3. The metal ball is known as bob of simple pendulum.

4. Meters per second is the international unit of speed.

5. The distance time graph for uniform speed is a straight line.