Answer:
If a spacecraft is in space for a long time, radiation is a problem. Designers must figure out a way to protect astronauts from the radiation.
Magma. Magma can be made of many different materials, and once it breaches the earth surface it is called lava. Lava is what comes out of volcanoes, magma is what is still underground
Answer:
true
Explanation:
A continental shelf is the edge of a continent that lies under the ocean. Continents are the seven main divisions of land on Earth
