Radiation and the Sun

What is thermal energy?

• the total energy of a substance due to the movement or vibration of particles

• the average energy of a substance due to the movement or vibration of particles

• the movement of energy through space

• the transmission of radiant energy in the form electromagnetic rays

What is temperature?

• the total energy of a substance due to the movement or vibration of particles

• the average energy of a substance due to the movement or vibration of particles

• the movement of energy through space

• the transmission of radiant energy in the form of electromagnetic rays

What is radiation?

• the total energy of a substance due to the movement or vibration of particles

• the average energy of a substance due to the movement or vibration of particles

• the movement of energy through space

• the transmission of radiant energy in the form of electromagnetic rays

How do we stay warm throughout the year?

• ultraviolet rays only reach Earth's surface

• radiant energy is transformed into kinetic energy

• the Sun emits energy in the form of x-rays

• visible light and infrared rays from the Sun reach the Earth's surface

What type of radiation causes summer tans and sunburns?

• infrared rays

• x-rays

• ultraviolet rays

• gamma rays

Why are living things on dry land not severely damaged by ultraviolet radiation?

• UV light is blocked by buildings

• UV light is absorbed by the atmosphere

• UV light is reflected by land

• UV light is invisible

What determines the amount of radiant energy that reaches the Earth?

• distance from the Moon

• ozone levels in the atmosphere

• planetary alignment

• tilt of the Earth

How do darker colours affect the absorption of radiant energy?

• they reflect more energy

• they absorb more energy

• they do not interact with energy

• they transmit energy

What do we see at night when moonlight is visible?

• UV rays

• X-rays

• reflection of sunlight off the moon

• gamma rays

What is the role of the atmosphere in the absorption of radiant energy?

• it reflects all energy

• it absorbs all energy

• it filters out some harmful rays

• it enhances energy transmission