science

• thermal energy : heat ~
• elastic energy : shaping
• gravitational energy : gravity
• kinetic energy : object or a particle has by reason of motion
• chemical energy: energy in molecules and atoms
• What is a good source of vitamin D?

  Sunlight
• What do trees and plants make from sunlight?

  Food
• What is the process called that plants use to make food?

  Photosynthesis
• What do the Greek words 'photo' and 'synthesis' mean?

  'Photo' means light, 'synthesis' means putting together
• What do plants need for photosynthesis?

  Sunlight, water, and carbon dioxide
• How do plants breathe?

  Through tiny openings called stomata
• What gas do plants take in during photosynthesis?

  Carbon dioxide
• What do plants give out during photosynthesis?

  Oxygen
• What do leaves contain that helps in photosynthesis?

  Tiny pigments called chloroplasts
• What do chloroplasts do in plants?

  They convert carbon dioxide, water, and sunlight into sugar and oxygen
• What is the sugar produced during photosynthesis used for?

  As food for the plants
• What is the overall process of photosynthesis called?

  Photosynthesis
• What is chlorophyll?

  A green pigment found in chloroplasts
• Why are plants known as the lungs of the world?

  They take in carbon dioxide and give out oxygen
• What are the main steps of photosynthesis?

  1. Light absorption by chlorophyll
  2. Water and carbon dioxide intake
  3. Conversion into sugar and oxygen
  4. Sugar used as food, oxygen released
• How do stomata function in plants?

  • Tiny openings on leaves
  • Allow intake of carbon dioxide
  • Facilitate release of oxygen
• Why does your breathing become heavy after running?

  Your body needs more oxygen to breathe
• What do you get oxygen from?

  The air around you
• What happens without oxygen?

  You'd be like a car without fuel
• What happens when you breathe in?

  You take in oxygen present in the air
• What obstructs dust particles in your nostrils?

  Tiny hairs present in your nostrils
• What is the windpipe also called?

  Trachea
• What do the Bronchi do?

  Carry air into each lung
• How many lobes does the right lung have?

  Three lobes
• How many lobes does the left lung have?

  Two lobes
• Why is the left lung smaller than the right lung?

  To give space to the heart
• What are the small air sacs in the lungs called?

  Alveoli
• What happens in the alveoli?

  Exchange of oxygen and carbon dioxide occurs
• What does blood do in the alveoli?

  Picks up oxygen and lets go of carbon dioxide
• What is the dome-shaped muscle beneath the lungs called?

  Diaphragm
• What does the diaphragm do when you breathe in?

  Contracts
• What does the diaphragm do when you breathe out?

  Expands
• What does the diaphragm separate?

  The chest cavity from the abdominal cavity
• What are some trivia facts about the lungs?

  • Lungs can float on water
  • A person breathes approximately 20,000 times daily
• What is the significance of oxygen for human life?

  It is one of the major reasons for being alive