# P2 Quiz

Quiz by Leah Firmstone, updated 12 months ago
 Created by Leah Firmstone about 4 years ago
273
18

### Description

GCSE Physics (P2 - Radiation and Life) Quiz on P2 Quiz, created by Leah Firmstone on 10/31/2015.

## Resource summary

### Question 1

Question
Choose the sources of light.
• Lightbulb
• Sun
• Moon
• Fire
• Water

### Question 2

Question
Light belongs to the electromagnetic spectrum, a family of electromagnetic waves that travel at a speed of 300 000 km/s through space, which is a vacuum.
• True
• False

### Question 3

Question
What is a 'photon'?
• A tiny packet of energy that behaves similar to a wave, but also as a stream of particles.
• A picture taken of light.

### Question 4

Question
The intensity of [blank_start]electromagnetic[blank_end] radiation gets less as you move [blank_start]further[blank_end] away from the source. The intensity of the Sun's radiation decreases further away from it because it is spread over a [blank_start]larger[blank_end] area. This is why planets more distant from the Sun than the Earth are much [blank_start]cooler[blank_end] than our planet. The earth receives more of the Sun's electromagnetic radiation because the intensity of the radiation is [blank_start]greater[blank_end] closer to the Sun. [blank_start]Intensity[blank_end] = energy transferred per second per m^2. If you move a torch closer to a surface, its light spreads over a smaller area and becomes [blank_start]brighter[blank_end]. The total energy from the torch each second is the [blank_start]same[blank_end], but the intensity of light on the surface increases. This happens because as the distance [blank_start]doubles[blank_end], the area the energy spreads over increases four-fold, and so the intensity [blank_start]decreases[blank_end] four-fold.
• electromagnetic
• further
• larger
• cooler
• greater
• Intensity
• brighter
• same
• doubles
• decreases

### Question 5

Question
X-Rays have a higher frequency than gamma rays.
• True
• False

### Question 6

Question
Radiation workers increase their risk of exposure to X-rays and [blank_start]gamma[blank_end] rays. They can choose whether to accept this [blank_start]risk[blank_end]. The risk can be monitored using [blank_start]dosimeters[blank_end], allowing problems to be spotted before too much harm is done. People who have mobile phone [blank_start]masts[blank_end] built near their homes have exposure to [blank_start]microwaves[blank_end] forced upon them. They tend to be less [blank_start]willing[blank_end] to accept any level of risk, and are more likely to [blank_start]overstate[blank_end] possible risks.
• gamma
• risk
• dosimeters
• masts
• microwaves
• willing
• overstate

### Question 7

Question
We are surrounded by ionising radiation all the time. The risk to health is very low, but people tend to overstate it. Why?
• it is unfamiliar to us
• it is invisible and hard to detect
• effects can be long lasting
• people want to deter new projects eg. nuclear power stations
• people are unsure of risks due to lack of education

### Question 8

Question
Why does a substance warm up when it absorbs radiation?
• the energy from the absorbed radiation is transferred to thermal (heat) energy
• the radiation excites the particles, generating thermal energy
• Both!

### Question 9

Question
The risks to living cells from microwaves are very low because microwaves have a low frequency.
• True
• False

### Question 10

Question
What is ozone?
• A form of oxygen containing three oxygen atoms.
• A substance that increases the amount of UV radiation on Earth.

### Question 11

Question
Ozone is produced when oxygen [blank_start]molecules[blank_end] absorb high energy UV radiation and react together. Ozone molecules may split into an oxygen molecule and a free oxygen [blank_start]atom[blank_end] if they absorb low energy UV radiation. In both these reactions, [blank_start]infrared[blank_end] radiation is emitted. Ozone also reacts with nitrogen, hydrogen, chlorine and bromine [blank_start]compounds[blank_end]. The absorption of [blank_start]ultraviolet[blank_end] radiation in the ozone layer reduces the amount of ultraviolet radiation reaching the Earth's [blank_start]surface[blank_end]. It also causes [blank_start]chemical[blank_end] changes in this part of the atmosphere.
• molecules
• atom
• infrared
• compounds
• ultraviolet
• surface
• chemical

### Question 12

Question
Using the diagram, explain what the Greenhouse effect is and how it affects the Earth.
• Not here

### Question 13

Question
Which of the following are greenhouse gases?
• Water Vapour
• Methane
• Carbon Dioxide
• Sulphur Dioxide
• Nitrogen

### Question 14

Question
What is Global Warming?
• The increase in average temperature worldwide caused by an increase in the greenhouse effect.
• Climate change.
• The extinction of antarctic species.

### Question 15

Question
A digital signal is a type of signal that can take one of a small number of fixed (discrete) values. The values change is discrete steps, and cannot take any values in-between.
• True
• False

### Question 16

Question
Which of these describes an analogue signal?
• A signal that can take one of a small number of fixed (discrete) values. The values change is discrete steps, and cannot take any values in-between.
• A signal which can vary continuously.

### Question 17

Question
There are several advantages of sending information using [blank_start]digital[blank_end] signals: - different types of [blank_start]information[blank_end] can be sent at the same time - digital signals can be sent more accurately than [blank_start]analogue[blank_end] signals - digital information can be stored and [blank_start]processed[blank_end] by computers. - digital signals can only take certain [blank_start]values[blank_end], so it is easy to tell which part of the signal is real and what is [blank_start]noise[blank_end] (unwanted information mixed in with the original signal).
• noise
• values
• processed
• analogue
• digital
• information

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