Unit 4 Mysteries Past and Present Yeh, A. Intermediate English WTUC

Vocabulary Preview An electromagnetic field is a place in space where there is a system of electric and magnetic forces. A sphere is a ball, a three-dimensional, round object. A mass is something that has a material presence, but no defined shape. A hypothesis is a theory or scientific guess. A lump is a small, shapeless piece of something. A dense object contains molecules that are very close together. Elements are the basic chemical components that make up all matter.

An electromagnetic field is a place in space where there is a system of electric and magnetic forces.

A sphere is a ball, a three-dimensional, round object.

A mass is something that has a material presence, but no defined shape.

A hypothesis is a theory or scientific guess.

A lump is a small, shapeless piece of something.

A dense object contains molecules that are very close together.

Elements are the basic chemical components that make up all matter.

8. Bear in mind means don’t forget, remember. 9. The bottom line is the most important point of the factor upon which everything else is based. 10. Get right down to it means to look at something closely and realistically.

8. Bear in mind means don’t forget, remember.

9. The bottom line is the most important point of the factor upon which everything else is based.

10. Get right down to it means to look at something closely and realistically.

2. Sun Dust and gas

3. Sun Star Gravitational attraction + matter breaks off but Remains trapped in orbit

Proto Star Turns rapidly

SUN Mercury Earth Jupiter high low temperature Planet size small large Exceptions Mars Uranus Neptune Pluto