Unit D – Space Exploration Lesson 4-5 (sec 2.2 and 2.3) Surviving There: Technologies for Living in Space and Using Space Technology to Meet Human Needs on Earth

A. Hazards there is from the in space no protection atmosphere outer space is called a which means there is no “vacuum” air, water or atmosphere astronauts may be exposed to cosmic and solar radiation slide 1 of 7

meteoroids and extremes in temperature exposed to meteoroids and extremes in temperature have to be brought along air and food stations and shuttles are which can cause small and cramped psychological problems slide 2 of 7

B. Microgravity is the force of attraction between masses gravity varies from planet to planet is the small amount of gravity acting on astronauts microgravity are used to the human bodies gravity on Earth slide 3 of 7

in orbit, astronauts experience which can: “weightlessness” 1. weaken muscles 2. reduce depth perception 3. bones lose calcium and become brittle 4. heart muscle weakens since it doesn’t have to pump as hard slide 4 of 7

C. Space Suits protect astronauts from space suits hazards in space space suits contain: 1. layers of different materials 2. air, water 3. heating and cooling devices 4. waste tubes slide 5 of 7

D. Water water may be filtered, purified and recycled many times during long space flights International Space Station (ISS) will be recycling of its water, including 100% urine slide 6 of 7

E. Air oxygen is made by the electrolysis of recycled water are removed from the air CO2, dust and microbes are all controlled temperature, air pressure and humidity slide 7 of 7

Using Space Technology to Meet Human Needs on Earth 2.3 Using Space Technology to Meet Human Needs on Earth

A. Communication depends on wireless technology communication satellites eg) cell phones, satellite TV, satellite radio satellites today use digital systems slide 1 of 4

B. Research Satellites are designed to stay in one position above the Earth weather satellites called geosynchronous orbit , like , are in LANDSAT and RADARSAT observation satellites not geosynchronous orbits follow ships at sea, track forest fires, report on environmental change etc. slide 2 of 4

C. Remote Sensing are in a low orbit (200 km – 1000 km altitude) remote sensing satellites can take of Earth’s surface or photographs collect data from sensing heat and radiation slide 3 of 4

D. Global Positioning are in orbit around Earth 24 global positioning satellites 3 hand-held receiver picks up signal from of the satellites and gives the precise location slide 4 of 4

Assignment Worksheet 6