ACTIVITY 3 The (1).
(3).
is the layer of gases surrounding the planet
Earth that is retained by Earth's gravity. It is composed of
(2)
and (4)
The five layers of
the atmosphere are (5).
(6)
(7).
(8)
and (9)
Energy from the sun is transferred to
the atmosphere by means of (10).
(11).
and
(12)
(13)
is the natural process of warming
the Earth. (14)
is a dangerous process because of the
abnormal increase of temperature on Earth. The increasing global
temperature is caused by high amounts of (15)
resulting from pollution

Gam radio signals can usually be heard behind a hill, but fm often cannot. that is, am signals bend more than fm. explain. (radio signals, as we shall see, are carried by electromagnetic waves whose wavelength for am is typically 200 to 600 m and for fm about 3 m.)

When an object is heated it contracts. a. true b. false

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s