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What is Science?

Why do you Learn Indigenous Knowledge?

Major Branches of Science

Other Branches of Natural Science

Supportive video on Major Branches of Science

Quiz 1

Practice Questions about Science

Practice Question about Science (Continued)

Exercise on Branches of Science

Quiz 2

Additional practice question

Science and Technology

Uses of Science and Technology

Practice Questions on Science and Technology

Quiz 1

Known Scientists in the World

Known Scientists in Ethiopia

Famous Ethiopian scientists

Ehical Principle In Science

Quiz 2

Some Common Laboratory Apparatus

Some Common Laboratory Apparatus(Continued)

Practice Exercise on Common Laboratory Apparatus

Laboratory Safety Rules

Laboratory

Lab Safety Rules

Quiz 1

Practice Exercise on Laboratory Safety Rules

Supportive Video on Lab Safety Rules

Exercise on Laboratory apparatus and Safety Rules

Hazard Signs and Symbols

Laboratory Safety Symbols and Meanings

Questions on Hazard sign s and Meanings

Quiz 1

Writing a Laboratory Report

Summary on Unit One

Review Questions on Unit 1 (Part 1 and 2)

Review Questions on Unit 1 (Part 3)

Review Questions on Unit 1 (Part 4)

GS G7 S6 L2(Practice on Matter and Energy

GS G7 S6 L1(Meaning and Properties of Matter

Which one is matter

GS G7 S6 L7(Exercise 2.3

Light Is Energy

GS G7 S6 L6(Examples of Diffusion

GS G7 S6 L5(Diffusion

GS G7 S6 L3(The Particulate Nature of Matter & Activity 2.3

GS G7 S6 L4(The Particle Theory of Matter

Solids

GS Gr7 S7 L1(2015)

GS Gr7 S7 L2(2015)

GS Gr7 S7 L3 (2015)

GS Gr7 S7 L05 (2015)

Gases

Recap on Solid, Liquid and Gases

GS G7 S8 L1(2015)

GS Gr7 S8 L2(2015)

GS Gr7 S8 L3 (2015)

GS Gr7 S8 L4 (2015)

GS Gr7 S8 L05 (2015)

GS Gr7 S9 L1 (2015) Physical Properties of Matter

Extensive and Intensive Properties

GS Gr7 S9 L2(2015) Physical Properties Detected by Sense Organs

GS Gr7 S9 L3 (2015) Measurable Physical Properties

Conductors and Insulator

GS Gr7 S10 L1 (2015)

Production of Soda

GS Gr7 S10 L2 (2015)

GS Gr7 S10 L3 (2015)

Types of Mixtures

GS Gr7 S11 L1 (2015)

GS Gr7 S11 L3 (2015)- Change of State

The Rusting of Iron

GS Gr7 S11 L2(2015)

Chemical Change In Photosynthesis

GS Gr7 S11 L4(2015)

GS Gr7 S12 L1(2015)

GS Gr7 S12 L2(2015)

Experiment 2.4

GS Gr7 S12 L3(2016)

GS Gr7 S12 L4(2015)

GS Gr7 S12 L5(2015)

The Five Separation Technique and Their Application

GS Gr7 S12 L6(2015)

GS Gr7 S13 L1(2015)

GS Gr7 S13 L2(2015)

GS Gr7 S13 L4(2015)

Lesson on Review Exercises - Part-2 Question-6

GS Gr7 S13 L3(2015)

GS Gr7 S13 L5(2015)

CGS Gr7 S14 L1(2015)

GS Gr7 S14 L2 (2015)

Element Symbolization

GS Gr7 S14 L3 (2015)

GS Gr7 S14 L4 (2015)

Unique Element Names

GS Gr7 S14 L5 (2015)

GS-G7-S15-L1

GS-G7-S15-L2

GS-G7-S15-L3

GS-G7-S15-L4

GS-G7-S15-L5

GS-G7-S15-L6

chemical symbol

Quiz 1

Quiz 2

GS G7 S16 L1

Noble Gases

GS G7 S16 L2

GS G7 S16 L3

Why Do Some Elements Have More Than One Valance Number

GS G7 S16 L4

chemical compound

Quiz 1

Quiz 2

Chemiacl Symbol and Formulas

GS-G7-S17-L1

GS-G7-S17-L2

GS-G7-S17-L3

GS-G7-S17-L4

GS-G7-S17-L5

Exercise 3.4

GS-G7-S17-L6

Binary compounds

Quiz 1

Quiz 2

GS-G7-S18-L1

Chemical Reactions In Our Daily Life

GS-G7-S18-L2

GS-G7-S18-L3

Production of Sulfuric Acid

GS-G7-S18-L4

GS-G7-S18-L5

Simple Chemical reaction

Quiz 1

Quiz 2

GS-G7-S19-L1

Does Burning Destroy Matter?

GS-G7-S19-L2

GS-G7-S19-L3

GS-G7-S19-L4

GS-G7-S19-L5

GS-G7-S19-L6

Law of conservation of mass

Quiz 1

Quiz 2

GS-G7-S20-L1

Lesson on Review Exercises - Ture or False

GS-G7-S20-L2-

GS-G7-S20-L3--

GS-G7-S20-L4

Gs G7 S21 L1

Who is Anton van leeuwenhoek?

Gs G7 S21 L2

Gs G7 S21 L3

Electron Microscope

Gs G7 S21 L4

Introductio to microscope

Quiz 1

Quiz 2

Gs- G7-S 22-L1

Gs- G7-S 22-L2

How Is Compoumd Microscope Works?

Gs- G7-S 22-L3

Gs- G7-S 22-L4

Magnification and Resolution

Microscope

Quiz 1

Quiz 2

Gs- G7-S 23-L1

Gs- G7-S 23-L2

Gs- G7-S 23-L3

Gs- G7-S 23-L4

Gs- G7-S 24-L1

Gs- G7-S 24-L2

Gs- G7-S 24-L3

Ribosomes

Gs- G7-S 24-L4

Robert Hooke

Gs- G7-S 24-L5

Quiz 1

Discovery of cell

Quiz 2

Gs G7 25 L1

Plant Cell

Gs- G7-S 25-L2

Gs- G7-S 25-L3

Gs- G7-S 25-L4

Endoplasmic Reticulum

Gs- G7-S 25-L5

Quiz 1

Structure of cell

Quiz 2

Gs- G7-S 26-L1

Why Do Animal Cell Have Irregular Shape?

Gs- G7-S 26-L2

Gs- G7-S 26-L3

Gs- G7-S 26-L4

Gs- G7-S 26-L5

Unicellular Organisms

Gs- G7-S 26-L6

Quiz 1

cell size and shape

Quiz 2

GS G7 S27- L1

ATP

GS G7 S27- L2

GS G7 S27- L3

GS G7 S27- L4

GS G7 S27- L5

Cellular Respiration

GS G7 S27- L6

Respiration and mitochondria

Quiz 1

Quiz 2

GS G7 S28- L1

GS G7 S28- L2

Chloroplasts

GS G7 S28- L3

GS G7 S28- L4

Photosynthesis Vs Cellular Respiration

Photosynthesis and Chloroplast

Quiz 1

Quiz 2

GS G7 S29- L1

GS G7 S29- L2

GS G7 S29- L3

GS G7 S29- L4

Revision on Microscope

Quiz 1

Summary: Microscope

Quiz 2

GS G7 S30- L1

Lesson on Review Exercises - Part-1 - Question-2

GS G7 S30- L2

GS G7 S30- L3

GS G7 S30- L4

GS G7 S30- L5

Quiz

Gs- G7-S31-L1

What are Living Things?

Gs- G7-S31-L2

Gs- G7-S31-L3

Gs- G7-S31-L4

Gs- G7-S31-L5

Classification of Organisms

Quiz 1

Quiz 1_1

Quiz 1_2

Quiz 1_3

Gs- G7-S32-L1

Gs- G7-S32-L2

Who Is The First Taxonomist?

The Longest Taxanomy Name In The World?

Gs- G7-S32-L3

Gs- G7-S32-L4

Quiz 1

Quiz 2

classification and Binomial namings

Gs- G7-S33-L1

Gs- G7-S33-L2

Biological Classification and How To Remember Them Easily

Gs- G7-S33-L3

Gs- G7-S33-L4

Waliya Ibex or Capra Walie

Gs- G7-S33-L5

Quiz 1

Hierarchy of of organisms classification

Quiz 2

Gs- G7-S34-L1

Gs- G7-S34-L2

Gs- G7-S34-L3

Record Breaking Animals!

Gs- G7-S34-L4

Gs- G7-S34-L5

Warm bloodedness and Cold Bloodedness

Gs- G7-S34-L6

Gs- G7-S34-L7

quiz 1

Animal kingdom

Quiz 2

Gs- G7-S35-L1

Gs- G7-S35-L2

Gs- G7-S35-L3

Xylem and Phloem

Gs- G7-S35-L4

Gs- G7-S35-L5

Gs- G7-S35-L6

Gymnosperms

Gs- G7-S35-L7

Quiz 1

Quiz 2

plant kingdom

Quiz 1_1

Gs- G7-S36-L1

Gs- G7-S36-L2

Monocotyledons and Dicotyledons

Gs- G7-S36-L3

Gs- G7-S36-L4

Gs- G7-S36-L5

Differences Between Angiosperms and Gymnosperms

Vascular and non vascular plants

Quiz 1

Quiz 2

Gs- G7-S37-L1

Gs- G7-S37-L2

Protists

Gs- G7-S37-L3

Autotrophic Protozoa

Gs- G7-S37-L4

Gs- G7-S37-L5

Gs- G7-S37-L6

Kingdom Protista

Quiz 1

Quiz 2

Gs- G7-S38-L1

Gs- G7-S38-L2

Gs- G7-S38-L3

Gs- G7-S38-L4

Gs- G7-S38-L5

Edible Fungi

Kingdom Monera

Kingdom fungi

Quiz 1

Quiz 2

Gs- G7-S39-L1

Different Animal Locomotions

Gs- G7-S39-L2

Gs- G7-S39-L3

Gs- G7-S39-L4

Gs- G7-S39-L5

Gs- G7-S39-L6

hierarchy of classification

Quiz 1

Quiz 2

Summary of Unit 5

Gs- G7-S40-L1

Gs- G7-S40-L2

Gs- G7-S40-L3

Gs- G7-S40-L4

Gs- G7-S40-L5

Gs- G7-S40-L6

Introduction

Gs- G7-S 41-L1

Gs- G7-S 41-L2

Shape of Earth

Gs- G7-S 41-L3

Ancient Beliefs About The Shape of Earth

Gs- G7-S 41-L4

Gs- G7-S 41-L5

Quiz 1

Quiz 2

Gs- G7-S 42-L1

Gs- G7-S 42-L2

Gs- G7-S 42-L3

Why Sunrise and Sunset Time Changes Seasonally?

Gs- G7-S 42-L4

Why Gravity Deacreases With Distance?

Gs- G7-S 42-L5

Evidences for true shape of earth

Quiz 1

Quiz 2

Gs- G7-S 43-L1

Gs- G7-S 43-L2

Gs- G7-S 43-L3

World Divided Into Time Zones

Gs- G7-S 43-L4

Earth Size With Numbers and Comparison

Gs- G7-S 43-L5

Quiz 1

Gs- G7-S 44-L1

Inner Core

Gs- G7-S 44-L2

Gs- G7-S 44-L3

How Terracing Works In Konso

Gs- G7-S 44-L4

Gs- G7-S 44-L5

Gs- G7-S 44-L6

External structure of earth

Quiz 1

Quiz 2

Gs- G7-S 45-L1

Gs- G7-S 45-L2

Gs- G7-S 45-L3

Gs- G7-S 45-L4

Gs- G7-S 45-L5

Gs- G7-S 45-L6

Internal structure of earth

Quiz 1

Quiz 2

Gs- G7-S 46-L1

Gs- G7-S 46-L2

Gs- G7-S 46-L3

Gs- G7-S 46-L4

Gs- G7-S 46-L5

Gs- G7-S 46-L6

Rotation of earth

Quiz 2

Quiz 2

Gs- G7-S 47-L1

Gs- G7-S 47-L2

Gs- G7-S 47-L3

Gs- G7-S 47-L4

Gs- G7-S 47-L5

Revolution of earth

Quiz 1

Quiz 2

Gs- G7-S 48-L1

Gs- G7-S 48-L2

Gs- G7-S 48-L3

Gs- G7-S 48-L4

Gs- G7-S 48-L5

Gs- G7-S 48-L6

Quiz 1

Gs- G7-S 49-L1

Gs- G7-S 49-L2

Gs- G7-S 49-L3

Gs- G7-S 49-L4

Gs- G7-S 49-L5

Quiz 1

Gs- G7-S 50-L1

Gs- G7-S 50-L2

Gs- G7-S 50-L3

Gs- G7-S 50-L4

Gs- G7-S 50-L5

Gs- G7-S 51-L1

Gs- G7-S 51-L2

Gs- G7-S 51-L3

Gs- G7-S 51-L4

Gs- G7-S 51-L5

Motion

Quiz 1

Quiz 2

Gs- G7-S 52-L1

Gs- G7-S 52-L2

Gs- G7-S 52-L3

Gs- G7-S 52-L4

Gs- G7-S 52-L5

Force

Quiz 1

Quiz 2

Gs- G7-S 53-L1

Gs- G7-S 53-L2

Gs- G7-S 53-L3

Gs- G7-S 53-L4

Gs- G7-S 53-L5

Gs- G7-S 53-L6

Gs- G7-S 53-L7

Effects of force

Quiz 1

Quiz 2

Gs- G7-S 54-L1

Gs- G7-S 54-L2

Gs- G7-S 54-L3

Gs- G7-S 54-L4

Gs- G7-S 54-L5

Gs- G7-S 54-L6

Quiz 1

Quiz 2

Gs- G7-S 55-L1

Gs- G7-S 55-L2

Gs- G7-S 55-L3

Gs- G7-S 55-L4

Gs- G7-S 55-L5

Quiz 1

Quiz 2

Gs- G7-S 56-L1

Gs- G7-S 56-L2

Gs- G7-S 56-L3

Gs- G7-S 56-L4

Gs- G7-S 56-L5

Gs- G7-S 56-L6

Measuring force

Quiz 1

Quiz 2

Gs- G7-S 57-L1

Gs- G7-S 57-L2

Gs- G7-S 57-L3

Gs- G7-S 57-L4

Gs- G7-S 57-L5

Gs- G7-S 57-L6

Energy definition

Quiz 1

Quiz 2

Gs- G7-S 58-L1

Gs- G7-S 58-L2

Gs- G7-S 58-L3

Gs- G7-S 58-L4

Gs- G7-S 58-L5

Gs- G7-S 58-L6

Quiz 1

Quiz 2

Kinetic energy

Gs- G7-S 59-L1

Gs- G7-S 59-L2

Gs- G7-S 59-L3

Gs- G7-S 59-L4

Gs- G7-S 59-L5

Gs- G7-S 59-L6

Quiz 1

Quiz 2

Potential energy

Gs- G7-S 60-L1

Gs- G7-S 60-L2

Gs- G7-S 60-L3

Gs- G7-S 60-L4

Gs- G7-S 60-L5

Quiz 1

Mechanical energy

Quiz 2

G7 Gs S61 L1

G7 Gs S61 L2

G7 Gs S61 L3

G7 Gs S61 L4

G7 Gs S61 L5

Energy sources

Quiz 1

Quiz 2

G7 Gs S62 L1

G7 Gs S62 L2

G7 Gs S62 L3

G7 Gs S62 L4

G7 Gs S62 L5

Energy sources (Non renewable)

Quiz 1

Quiz 2

G7 Gs S63 L1

G7 Gs S63 L2

G7 Gs S63 L3

G7 Gs S63 L4

Wise use of natural resources and their conservation

Quiz 1

Quiz 2

G7 Gs S64 L1

G7 Gs S64 L2

G7 Gs S64 L3

G7 Gs S64 L4

Resource depletion and degradation

Quiz 1

Quiz 2

G7 Gs S65 L1

G7 Gs S65 L2

G7 Gs S65 L3

G7 Gs S65 L4

G7 Gs S65 L5

Quiz 1

G7 Gs S66 L1

G7 Gs S66 L2

G7 Gs S66 L3

G7 Gs S66 L4

Quiz 1

G7 Gs S67 L1

G7 Gs S67 L2

G7 Gs S67 L3

G7 Gs S67 L4

G7 Gs S67 L5

G7 Gs S68 L1

G7 Gs S68 L2

G7 Gs S68 L3

G7 Gs S68 L4

G7 Gs S68 L5

G7 Gs S68 L6

G7 Gs S69 L1

G7 Gs S69 L2

G7 Gs S69 L3

G7 Gs S69 L4