Oscar Academy Under the Supervision of Ministry of Education and Higher Education

تتجدد ... وثقة متزايد عطاء2017-2018

April Monthly Second Semester Revision

Subject: Science Grade: 6 Sec _____

Name: _______________________________

A. True or False:

_______ 1. CFC’s are man-made chemicals that were once used in aerosols and refrigerators.

_______ 2. The hole in ozone layer has been caused by pollution from power stations and cars.

_______ 3. Oil and natural gas were created from the bodies of sea plants and animals.

_______ 4. Coal, oil and gas are different types of fossil fuel.

_______ 5. Most of the electricity we use is generated by batteries.

________6. Food is an energy source for growth and movement.

________7. We use most of the petroleum recovered from oil wells to manufacture plastics.

________8. When fossil fuels burn, carbon dioxide is released into the atmosphere

________9. Increased use of fossil fuels is causing the percentage of carbon dioxide in the

atmosphere to rise.

________10. Wind and wave energy are non-renewable energy resources.

B. Read the sentences carefully and circle the letter of the correct answer.

1. Man-made chemicals that were once used in aerosols and refrigerators. a. ultraviolet radiation b. CFCs

2. The fossil fuel also known as crude oil a. fractional distillation b. petroleum

3. A layer of gas high in the atmosphere that blocks ultraviolet radiation from the sun? a. ozone Layer b. ultraviolet radiation

4. The image in a plane (flat) mirror is________________________________, which means that it is not really there? a. real b. virtual

5. Reflection in a concave mirror causes parallel light rays to _________________________________ a. diverge b. converge

This material is only a sample of question for revision and is not an exam paper. Students must study from the given syllabus.

bitumen diesel gases kerosene naphthalene oils petrol

C. Use the picture below to complete the table.

Device Kind of Energy Produced Energy Source

D. Draw and label the name of the fractions separated from petroleum at the correct outlets of the

fractionating columns. Use the words in the box.

This material is only a sample of question for revision and is not an exam paper. Students must study from the given syllabus.

E. Draw the images of these letter shapes in the mirror.

F. Draw the following.

CONVEX CONCAVE

G. Draw the light rays after they have passed through the lenses.

H. Identify the following:

1. Reflection in a concave mirror causes parallel rays to ______________________________.

2. Reflection in a convex mirror causes parallel rays to _______________________________.

3. When you are close to a concave mirror your image is _______________________________.

4. The image in a convex mirror is always _______________________ and upright.

I. The picture shows a light ray going towards a WATER. Draw the direction the refracted light ray

will take in the water.

This material is only a sample of question for revision and is not an exam paper. Students must study from the given syllabus.

HJCDKL

J. Define the following and give an example.

Refraction

______________________________________________________________________________

______________________________________________________________________________

Concave Mirror :

____________________________________________________________________________

______________________________________________________________________________

__

Convex Mirror :

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

This material is only a sample of question for revision and is not an exam paper. Students must study from the given syllabus.