SCIENCE 3: 4TH Q REVIEW

What is the BIG BANG THEORY?

• It is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now—and it is still stretching!

• An ongoing process of formation, burning fuel, and dispersal of material when all the fuel is used up.

• The pressure within the core increases causing atoms to become unstable. Eventually the core collapses, producing a powerful supernova that throws heavy elements out into space.

WHAT IS THE IMPORTANCE OF ENVIRONMENT?

• The importance of the environment lies in its provision of essential resources for life, climate regulation, and biodiversity support.
• Environment plays an important role in healthy living and the existence of life on planet earth. Earth is a home for different living species and we all are dependent on the environment for food, air, water, and other needs.

• The environment has no impact on human life.

What is in the UNIVERSE?

• The universe contains everything that exists: Earth, the Sun, the stars, galaxies (collections of billions of stars), and everything else in space.

• Mountains, rivers, forests, deserts
• Flowers, animals, cars, buildings

HOW DOES AIR MOVE?

           

• The movement of air is caused by warm and cold air moving from one place to another.

• Air moves because of the presence of clouds
• Air moves due to the rotation of the Earth

WHAT ARE THE USES OF AIR?

• Sustain life and growth

  Combustion

  Maintaining Temperature

  Supplier of Energy

  Photosynthesis

• Running

  Reading

  Dancing

• Swimming

  Writing

  Cooking

evaporation, condensation, precipitation, and collection = ? (UPPER CASE)

What is the chemical formula of water? (UPPER CASE)

It is a transparent, tasteless, odorless, and nearly colorless chemical substance, and it is the main constituent of Earth's hydrosphere and the fluids of all known living organisms. (UPPER CASE)

TRUE or FALSE: Clouds form when water condenses in the sky. (UPPER CASE)

It is the pattern of weather that occurs over a long period of time. (UPPER CASE)