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Q1 Answer: An object is in motion if it changes position relative to a reference point. Objects that are fixed relative to Earth – such as a building, a tree, or a sign - make good reference points.

Q2 Answer: Well, motion is caused by a force. ... In general, we can say that to move something, we need to apply a push or a pull, which is, by definition, a force. Force is used to start a motion but at the same time force applied in the opposite direction can cause a motion to stop.

Q3 Answer: A reference point is important in determining motion because in order to say that something is moving, you need to have something stationary to compare it to.

Q4 Answer: By knowing the distance to an object we can learn about its true size. We can measure the size an object takes up on sky. To work out its actual size we then need to know how far away it is. The further away an object is the smaller it looks.

Q5 Answer: The Ruler, Measuring Tape, Measuring Wheel and the Long Tape or Taoe Reel

Q6 Answer: Motion is a phenomenon that is very common in our daily life. For example, the car in which you travel moves, the air we breathe is in motion, the blood in our veins is in motion, the earth is in motion, the universe is moving and many more

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