WorksheetsHave You Been Paying Attention? in Year 7 and 8
Total questions: 14
Worksheet time: 28mins
Why are models important in Science?
All substances are made up of (a) , hard particles that are too (b) to even see with a normal microscope. The particles always have (c) and are (d) . The particles move (e) as temperature is increased.
The (a) particles are to one another, the (b) the attraction between them. The word in science used for particles is (c) if there is just one particle. If there are two or more (d) connected by a bond, the particles are called (e) .
Match the following PROPERTIES (characteristics) of solids, liquids and gases to the correct explanation (reason why that property exists).
E.g. A property of Mrs Butler is that she has brown hair. The explanation is that her Dad has brown hair and passed it onto her.
Gases are often invisible
Particles in this state are often spread so far apart you can't see them.
Liquids can't be compressed (pushed tighter together).
They're already so closely packed that there is almost no space between particles.
Solids expand (get bigger) when heated.
Heating gives particles energy, making them vibrate faster and more further apart.
Gases contract (get smaller) when cooled.
Cooling means the particles lose energy and so slow down, moving closer together.
Gases fill their container.
There are no bonds between them and they have a lot of energy, so they can move however they like.
Name the parts of the diagram with letters A-E using the options given.
A is (a)
B is (b)
C is (c)
D is (d)
E is (e)
Energy is needed to make a change happen. Pick ONE option below:
making a sound
making a light
changing the shape of something
Explain HOW energy is involved in making this happen. Give a specific example of this type of change.
What is the unit for energy?
Newtons
Joules
Hertz
Volts
Give an example of each of the following types of energy:
a) Kinetic (movement)
b) Heat
c) Light
d) Sound
e) Electrical
f) Gravitational potential (stored)
g) Chemical
h) Elastic potential
i) Nuclear
There are three ways heat can be transferred from one place to another.
Match the name to the correct way heat moves.
Radiation
Heat travelling by waves in a vacuum (through space with no matter)
Conduction
Heat travelling via objects in contact. Mainly in solids.
Convection
Heat transferred through liquids and gases.
Fill in the types of energy that describe the energy change.
E.g. boiling a kettle: electrical energy --> heat energy
A) Using a toaster: electrical energy --> (a)
B) Using a mobile phone: (b) --> heat, light and sound energy
C) Turning on a car and backing out of the driveway: chemical energy --> (c) , heat energy and sound energy
D) Running: Chemical potential energy --> (d) , heat energy
E) A solar panel: (e) --> electrical energy
The Law of Conservation of Energy states that: "Energy can never be created or destroyed. It can only can converted from one form of energy to another".
Explain what this means by writing this in your own words.
One of the consequences of the Law of Conservation of Energy is that if one object wastes energy, it is gained by another object - usually as heat.
Give a real-life example of this.
Energy sources can either be 'renewable' or 'non-renewable'.
Explain the difference between these terms.
Which option contains ONLY renewable sources of energy?
Wind, natural gas, solar
Coal, solar, hydro-electric
Solar, hydro-electric, wind
Crude oil, natural gas, coal
