This document is a revision sheet for a lesson on mass and weight. It defines key terms like mass, weight, Newton, and spring scale. It provides exercises to compare and contrast mass and weight, calculate weight on different planets given mass, and correctly identify mass and weight in different scenarios. The questions cover defining and calculating mass and weight, comparing how they are different and affected by location, and identifying mass or weight in word problems.

1. Mr. Mohammed Abdel Raouf 01145614089
Mr. Mohammed Abdel Raouf 01145614089
Name : ------------------------
Date : ----- / ------ / ---------
Unit 1 Lesson 1 (Mass And Weight)
Revision sheet ( 1 )
Objectives:
1. Determine the weights of some objects using the spring scale.
2. Compare between mass and weight.
3. Calculating weight in different places.
Vocabulary: mass – weight – Newton – sensitive scale – spring scale – force of
gravity -
I-Complete the following:
1- Mass is measured by using -------------------------- device and its unit is
----------------------------------- and -------------------------------------.
2- Weight is not constant as it changes with changing the distance from the
--------------------------------- of the planet.
3- Objects weight depends on:
a- ----------------------------------------------------------------------
b- ----------------------------------------------------------------------
4- The unit of measuring weight is -----------------------------.
5- The weight = MASS (Kg) x ------------
II- Write the scientific terms:
1- The amount of matter forming a body. ( ------------------------- )
2- The force with which the body is attracted to the the earth.( --------------- )
3- The unit of measuring mass that equals 1 litre of water.( --------------------- )
4- Unit of measuring weight and equals to weight of a body whose mass is 100 gm.
( ------------------------- )

2. Mr. Mohammed Abdel Raouf 01145614089
Mr. Mohammed Abdel Raouf 01145614089
5- A device used to measure weight. (--------------------------)
III- Fill in the following table:
Point of comparison
Mass
Weight
Definition
-------------------------------- --------------------------------
------------------------------- -------------------------------
Direction
--------------------------------
------------------------------
Effect of changing place
-------------------------------- -------------------------------- --------------------------------
------------------------------- ------------------------------- -------------------------------
IV- Give reasons for:
1- A body of mass 60 kg on Earth is also of mass 60 kg on the moon.
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2- The weight of the object changes slightly at different places on Earth.
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3- If an object is taken to the moon it weighs about 1/6 of its weight on Earth.
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V- Calculate:
1- An object has a mass of 4 kg. What is its weight on Earth?
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3. Mr. Mohammed Abdel Raouf 01145614089
Mr. Mohammed Abdel Raouf 01145614089
2- An object has a mass of 60 kg.
a- What is its weight on Earth?
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b- What is its weight on the moon?
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c- What is its mass on the moon?
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VI- Choose the correct answer:
1- A tool for measuring weight.
a- One arm balance scale.
b- Two arms balance scale.
c- Digital scale
d- Spring scale.
2- A body weighs 20 Newtons on Earth. It’s mass equals:
a- 10 kg.
b- 2 kg.
c- 200 kg
d- 20 kg.
- An astronaut is travelling in his space ship from the earth to the moon. If you know that his mass on earth is 60 kg. What is his mass and weight in the space ship?
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