Learn Science Motion and Time , Class 7 Science Motion and Time Exercise, Free Online Motion and Time Lessons

Class 7 Science Study Material

An Educational platform for Preparation and Practice Class 7. Kidsfront provide unique pattern of learning Science with free online comprehensive study material in the form of QUESTION & ANSWER for each Chapter of Science for Class 7. This study material help Class 7, Science students in learning every aspect of Motion and Time . Students can understand Motion and Time concept easily and consolidate their learning by doing Online Practice Tests on Science ,Motion and Time chapter repeatedly till they excel in Class 7, Motion and Time . Free ONLINE PRACTICE TESTS on Class 7, Motion and Time comprise of Hundreds of Questions on Motion and Time , prepared by the highly professionals team. Every repeat test of Motion and Time will have new set of questions and help students to prepare themselves for exams by doing unlimited Online Test exercise on Motion and Time . Attempt ONLINE TEST on Class 7,Science ,Motion and Time in Academics section after completing this Motion and Time Question Answer Exercise.

Unique pattern

Topic wise:Motion and Time preparation in the form of QUESTION & ANSWER.
Evaluate preparation by doing ONLINE TEST of Class 7, Science ,Motion and Time .
Review performance in PRACTICE TEST and do further learning on weak areas.
Attempt repeat ONLINE TESTS of Science Motion and Time till you excel.
Evaluate your progress by doing ONLINE MOCK TEST of Class 7, Science , All TOPICS.

Motion and Time

A simple pendulum takes 30 seconds to complete 90 oscillations. So, the time period of the pendulum is

a) 0.45 seconds.
b) 0.33 seconds.
c) 0.78 seconds.
d) 1.1 seconds.

✔Answer

✔Solution

Correct Answer Is : 0.33 seconds.

Solution Is : Time period of a simple pendulum is the time taken by a pendulum for a single oscillation. Time period = time taken by the oscillations / no .of oscillations = 30 seconds / 90 = 0.33 seconds.

Basic standard unit of time is a

a) Second.
b) Hour.
c) Minute.
d) Milli-second.

✔Answer

✔Solution

Correct Answer Is : Second.

Solution Is : For the sake of uniformity, scientists all across the world have adopted a set of standard units of measurement. The worldwide accepted system of units is INTERNATIONAL SYSTEM OF UNITS known as (SI) units. As per this system, standard units for the measurements of basic quantity which we come across in mechanics are: (a) S.I. unit of length is metre(m). (b) S.I. unit of mass is kilogram(kg). (c) S.I. unit of time is seconds(s).

Quartz clocks

a) Use water ripples to calculate time.
b) Use sunrays to calculate time.
c) Use a stick.
d) Give accurate time.

✔Answer

✔Solution

Correct Answer Is : Give accurate time.

Solution Is : Quartz clocks have an electric circuit with one or more cells, due to which, they show more accurate time. Water clocks, sundials etc., manually use nature to calculate time which may have errors.

Slower moving vehicles ________as compared to fast moving

a) Have higher speed
b) Have slower speed.
c) Have equal speed.
d) Cover more distance.

✔Answer

✔Solution

Correct Answer Is : Have slower speed.

Solution Is : The distance covered by the slow moving vehicles is less than the distance covered by the fast moving vehicles in a given time and speed is equal to distance covered/ time taken. Thus, slower moving vehicles will have slower speed as compared to fast moving vehicles.

The time period of a simple pendulum does not change, if the displacement of bob is slightly changed.

a) The statement is not always true.
b) The statement is always true.
c) The statement is sometimes true.
d) The statement is absolutely wrong.

✔Answer

✔Solution

Correct Answer Is : The statement is always true.

Solution Is : The time period of a simple pendulum does not change, if the displacement of bob is slightly changed as time period,?. Hence, time period only depends on the length of the pendulum.

When the distance covered by an object is directly proportional to time, it is said to travel with

a) Zero velocity.
b) Constant speed.
c) Constant acceleration.
d) Uniform acceleration.

✔Answer

✔Solution

Correct Answer Is : Constant speed.

Solution Is : When the distance covered by an object is directly proportional to time, it means that the body covers equal distance in equal intervals of time, i.e., constant speed.

Speed can be defined as the distance travelled by a moving object

a) Per unit time.
b) In any time.
c) By light.
d) Multiplied by the time taken

✔Answer

✔Solution

Correct Answer Is : Per unit time.

Solution Is : Speed can be defined as the distance travelled by a moving object per unit time. The standard unit in which the speed is measured is m/s.

Time period is defined as the time taken

a) By the pendulum to complete one oscillation.
b) To go from one extreme to the other.
c) To return to mean position from the extreme on one side only.
d) To go from one extreme to the mean position.

✔Answer

✔Solution

Correct Answer Is : By the pendulum to complete one oscillation.

Solution Is : Time period is defined as the total time taken by the pendulum to move from the mean position to one of the extreme position and back to mean position and then it moves to the other extreme position and again back to the mean position.

Average speed is the total distance covered

a) Divided by the distance travelled in one hour.
b) Multiplied by the total time taken.
c) Divided by the total time taken.
d) In one hour.

✔Answer

✔Solution

Correct Answer Is : Divided by the total time taken.

Solution Is : When a body moves with unequal distances in equal intervals of time, then we calculate average speed, which is the total distance covered divided by the total time taken.

An oscillation is said to be complete when

a) The bob of a pendulum starts from its mean position.
b) The bob of a pendulum moves to extreme on one side and goes to the extreme on the other side.
c) The bob of a pendulum returns to its original mean position.
d) The bob of a pendulum starts from its mean position, goes to extreme on one side and then to extreme on the other side by passing through the mean position and finally comes back to the mean position.

✔Answer

✔Solution

Correct Answer Is : The bob of a pendulum starts from its mean position, goes to extreme on one side and then to extreme on the other side by passing through the mean position and finally comes back to the mean position.

Solution Is : An oscillation is said to be complete when the bob of pendulum starting from its mean position, goes to extreme on one side and then to extreme on the other side by passing through the mean position and finally comes back to the mean position.

❑Acids, Bases and Salts
❑Nutrition in Animals
❑Motion and Time
❑Light
❑Heat
❑Forests- Our Lifeline
❑Fibre to Fabric
❑Weather Climate and Adaptations of Animals to Climate
❑Water A Precious Resource
❑Waste Water Story
❑Transportation in Animals and Plants
❑Soil
❑Reproduction in Plants
❑Electric Current And Its Effects
❑Respiration in Organisms
❑Nutrients in Plants
❑Physical and Chemical Changes

Coloring With Vigor

Stories & Rhymes

Exploration

English

Maths

Puzzles

Class 7 Science Study Material

Motion and Time

A simple pendulum takes 30 seconds to complete 90 oscillations. So, the time period of the pendulum is

Correct Answer Is : 0.33 seconds.

Solution Is : Time period of a simple pendulum is the time taken by a pendulum for a single oscillation. Time period = time taken by the oscillations / no .of oscillations = 30 seconds / 90 = 0.33 seconds.

Basic standard unit of time is a

Correct Answer Is : Second.

Quartz clocks

Correct Answer Is : Give accurate time.

Solution Is : Quartz clocks have an electric circuit with one or more cells, due to which, they show more accurate time. Water clocks, sundials etc., manually use nature to calculate time which may have errors.

Slower moving vehicles ________as compared to fast moving

Correct Answer Is : Have slower speed.

Solution Is : The distance covered by the slow moving vehicles is less than the distance covered by the fast moving vehicles in a given time and speed is equal to distance covered/ time taken. Thus, slower moving vehicles will have slower speed as compared to fast moving vehicles.

The time period of a simple pendulum does not change, if the displacement of bob is slightly changed.

Correct Answer Is : The statement is always true.

Solution Is : The time period of a simple pendulum does not change, if the displacement of bob is slightly changed as time period,?. Hence, time period only depends on the length of the pendulum.

When the distance covered by an object is directly proportional to time, it is said to travel with

Correct Answer Is : Constant speed.

Solution Is : When the distance covered by an object is directly proportional to time, it means that the body covers equal distance in equal intervals of time, i.e., constant speed.

Speed can be defined as the distance travelled by a moving object

Correct Answer Is : Per unit time.

Solution Is : Speed can be defined as the distance travelled by a moving object per unit time. The standard unit in which the speed is measured is m/s.

Time period is defined as the time taken

Correct Answer Is : By the pendulum to complete one oscillation.

Solution Is : Time period is defined as the total time taken by the pendulum to move from the mean position to one of the extreme position and back to mean position and then it moves to the other extreme position and again back to the mean position.

Average speed is the total distance covered

Correct Answer Is : Divided by the total time taken.

Solution Is : When a body moves with unequal distances in equal intervals of time, then we calculate average speed, which is the total distance covered divided by the total time taken.

An oscillation is said to be complete when

Correct Answer Is : The bob of a pendulum starts from its mean position, goes to extreme on one side and then to extreme on the other side by passing through the mean position and finally comes back to the mean position.

Solution Is : An oscillation is said to be complete when the bob of pendulum starting from its mean position, goes to extreme on one side and then to extreme on the other side by passing through the mean position and finally comes back to the mean position.

Other Topics

Kids Learning

Academics

Competitive Exams

Govt. Jobs Exams