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Summary Natural Sciences Term 1 Grade 7 (Via Afrika-textbook)
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Summary of 17 pages for the course Natural Sciences at 7th Grade (.)
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0, Table of Contents
Section 1 : Life and living things .................................................................................................. 2
Topic 1 : The biosphere ................................................................................................................ 2
Topic 2 : Biodiversity .................................................................................................................... 5
Topic 3 : Sexual reproduction ..................................................................................................... 10
Topic 4 : Variation ...................................................................................................................... 16
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, Section 1 : Life and living things
TOPIC 1 : THE BIOSPHERE
Glossary
Term Definition
Aquatic Live in water.
Terrestrial Live on land.
Rotten Broken down.
Hypothesis An idea or explanation that you can test with a study or investigation.
Habitat The place where an organism lives.
The biosphere is where there is life
• Living beings are dependent on their physical environment.
• The biosphere is what life is all about.
• All plants, animals and micro-organisms live within the biosphere.
• Plants use sunlight for the process of photosynthesis.
• During photosynthesis, light energy is converted into chemical energy.
• Animals depend on plants for their energy.
What the biosphere is made of
• The lithosphere (soil and rocks).
• The hydrosphere (water).
• The atmosphere (gases).
There are many different kinds of living things
• Plants and animals live in specific environments.
• Plants provide shelter where many animals can live.
• Animals transport pollen and seeds.
• It helps the plants with reproduction and spread.
• Plants and animals need each other to live and grow.
• No plant or animal can exist alone.
Seven life processes
Nutrition (food)
• Living organisms need nutrients.
• Plants extract minerals and water from the soil.
• They use it together with energy from the Sun during photosynthesis.
• Animals feed on plants and sometimes on other animals to obtain energy.
• Plants are producers and animals are consumers.
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