WorksheetsYear 7 Science Review
Total questions: 167
Worksheet time: 2hrs 56mins
Science Safety Symbol: Should be used to protect your eyes.
Posion: Do not inhale or get on your skin.
Wash your hands thoroughly when finished.
water
shoes
eye drops
eye wash station
If you get chemicals into your eyes, what should you use.
eye wash station
fire blanket
towel
goggles
What is the first thing you should do in an investigation?
Talk with their friend about the experiment.
Read all the directions for the experiment.
Put on goggles.
Clear workspace.
What should you do if you break or spill something during an investigation?
Tell your lab partner.
Call your mom.
Clean it up yourself.
Tell your teacher immediately.
Should you rearrange the steps of an investigation to make it more fun?
yes, you only got one life!
no, NEVER!!! NEVER!!!!
I can perform an experiment of my own
when I'm sure it is safe to do so
whenever I want to
only with permission from the teacher
never
If you are not sure what to do during a lab or other activity
ask the teacher
change lab partners
guess
just sit quietly and do nothing
What are the states of matter?
solid, liquid, and juice
solid and liquid
solid and gas
solid, liquid, and gas
Which form of matter does not take the shape of its container?
liquid
gas
solid
air
A gas
has a definite shape but no definite volume
has a definite volume but no definite shape
has fast-moving particles
none of the above
At higher temperatures
particles in an object have less energy
particles in an object move faster
a gas contracts
none of the above
Which state of matter has molecules that slide past each other but stay close together?
They do not form a regular pattern.
solid
liquid
gas
semi-solid
In the above diagram, "State of Matter B" is a liquid. This means that it has:
definite shape and volume.
no definite shape or volume.
definite volume, but changing shape.
definite shape, but changing volume.
What is happening when my ice cream changes from a solid to a liquid?
freezing
melting
burning
evaporation
What is happening when my water bottle in the freezer goes from a liquid state to a solid state?
melting
evaporating
freezing
cutting
What happens when my glass of water is sitting in the sun and disappears into a gas?
evaporation
burning
melting
freezing
My glass of ice water is sitting in the sun and has droplets of water on the outside of the glass. What is happening?
condensation
evaporating
melting
freezing
Which of the following is not a state of matter
Ice
Gas
Liquid
Solid
What state of matter?
Solid
Liquid
Gas
Plasma!!!
What state of matter?
Solid
Liquid
Gas
What state of matter?
Solid
Liquid
Gas
Change from Liquid to Solid is called ...
fusion
Freezing
sublimation
evaporation
A solid turning into a liquid
Adding thermal enrgy
Removing thermal energy
A liquid turning into a gas.
Adding thermal energy
Removing thermal energy
A gas turning into a liquid.
Adding thermal energy
Removing thermal energy
A solid turning into a gas
Adding thermal energy
Removing thermal energy
During the process of sublimation,
a solid turns directly into a gas
a solid turns into a liquid
a gas turns directly into a solid
a liquid turns into a gas
The freezing point of water is the same as its melting point, which is 0 degrees Celsius.
True
False
When a gas cools to become a liquid it loses thermal energy.
True
False
Diffusion is the natural movement of molecules from:
Areas of low concentration to areas of high concentration
Areas of high concentration to areas of low concentration
Cold to hot environments
Gaseous to liquid environments
What causes diffusion?
The constant, random motion of molecules
Magnetic attraction between atoms
The nuclear forces that hold atoms together
The tendency of atoms to form chemical bonds with one another
An increase in temperature does what to diffusion?
Speeds it up
Slows it down
Nothing
Stops it all together
If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?
The pressure will increase
The pressure will decrease
In all directions
In no direction
We can increase the pressure of a gas by:
Not changing the temperature of the gas
Decreasing the temperature of the gas
Increasing the temperature of the gas
Gas pressure is caused by
Gas molecules colliding with each other and walls of container
Gas molecules not moving
The reason gases can be compressed is because:
The particles are very close together.
The particles are merely vibrating.
The particles are unable to move.
The particles are very far apart.
Is this an animal or a plant cell?
Animal
Plant
Which structure contains DNA and controls the activities of the cell?
Cell membrane
Cytoplasm
Mitochondria
Nucleus
What is the role of the cell wall in a plant cell?
Makes the cell firm when it is full of water
Site of photosynthesis
Gives the cell structural support
Controls which substances leave or enter the cell
Identify structure C in the diagram
Cytoplasm
Cell membrane
Cell wall
Chloroplast
What is the role of the chloroplast in the plant cell?
Gives the cell structural support
Site of photosynthesis
Site of chemical reactions
Controls the activities of the cell
Identify structure C in the diagram
Cytoplasm
Cell membrane
Nucleus
Mitochondrion
In which structure does aerobic respiration take place?
Chloroplast
Nucleus
Mitochondrion
Vacuole
Identify structure E in the diagram
Chloroplast
Nucleus
Mitochondrion
Vacuole
Where in the cell do chemical reactions take place?
Cytoplasm
Mitochondria
Chloroplasts
Nucleus
Which structure is made of the sugar cellulose?
Cell membrane
Cell wall
Cytoplasm
Vacuole
Which type of specialized cell carries oxygen from the lungs all over the body?
red blood cells
skin cells
muscle cells
white blood cells (macrophages)
nerve cells (neurons)
What is the function of nerve cells?
They are long and have finger-like projections.
Transport oxygen throughout the body.
Control DNA expression.
Transmit electrical signals to different parts of the body.
Root hair cells easily take in water from soil.
This statement describes a STRUCTURE.
This statement describes a FUNCTION.
What are the features of this cell to help it in its function?
Many hair like structure
Rectangular
Many mitochondria
Nuclues
What is the main function of palisade cells?
To protect the plant from insects
To reflect light and protect against direct sunlight
To capture light for photosynthesis
To provide space for gas exchange
Which among the uni- cellular organisms can perform photosynthesis
Bacteria
Fungi
Euglena
Amoeba
Which part of Euglena helps it to detect sunlight for photosynthesis?
flagellum
eyespot
stigma
nucleolus
Euglena make their food in the...
Flagellum
Chloroplast
Cell Membrane
Eye spot
A hot drink has...
Kinetic Energy
Heat Energy
Thermal Energy
Nuclear Energy
A cyclist at the top of a hill has...
Kinetic Energy
Chemical Potential Energy
Elastic Potential Energy
Gravitational Potential Energy
Humans get their energy from...
Chemical Potential Energy
Thermal Energy
Kinetic Energy
Nuclear Energy
Energy stored in objects being stretched or squashed...
Elastic Potential Energy
Kinetic Energy
Chemical Energy
Thermal Energy
The energy going into an energy transfer is always equal to the energy coming out. True or False?
True
False
Batteries are an example of which type of energy store?
Thermal
Magnetic
Chemical
Gravitational potential
Which of these four examples are is an example of an energy transfer
Thermal
Elastic
Magnetic
Mechanical
If energy is transferred mechanically the object is being what?
pulled/pushed/stretched/squashed
shoved/pushed/light
sound/heat/pushed
electrically/pushed/sound/light
Conservation of energy means that...
Energy can be destroyed and made before being transferred
Energy can't be made or destroyed it can only transferred from one store to another
Energy can be made and destroyed
Energy can be made and destroyed then transferred from one store to another
What is a calorie?
A unit of measurement for weight
A unit of measurement for energy
A unit of measurement for temperature
A unit of measurement for time
What happens if we consistently consume more energy than we burn?
We will lose weight
We will gain weight
Our body temperature will increase
Our body will become malnourished
What is the main function of calories in our body?
To enable digestion
To fuel physical activity
To support the basic functions of organs and tissues
To raise body temperature
What is the average calorie count of a pizza slice?
78 calories
52 calories
2000 calories
272 calories
What is the basal metabolic rate?
The number of calories needed to survive without eating or moving
The number of calories needed for digestion
The number of calories needed for physical activity
The number of calories needed for basic organ functions
Who requires slightly more calories than usual?
Elderly people
Pregnant women
Athletes
Children
Which type of food takes more energy to digest?
Celery
Potato chips
Bread
Apple
What can happen if you eat too many foods with low nutritional value?
You will gain weight
You will lose weight
You will become malnourished
You will have increased energy levels
......is a bad conductor of heat
copper
iron
plastic
Aluminium
A form of energy that transfers from the higher temperature objects to the lower temperature objects
Temperature
Heat
Thermometer
No correct answer
..........is the degree of hotness or coldness of a body .
Heat
Thermometer
Temperature
No correct answer
Materials that do not conduct heat well are called.........
Conductors
Insulators
Aluminium is used in making .......
Handles of kettles
Cooking pots and kettle
Heavy blankets
The handle of electric iron is made of .......
Iron
Aluminium
Plastic
Heat is used in our daily life in ........
Cooking
Heating water
Warming the house
All of them
Conduction is heat transferring through a .....
Liquid
Solid
Gas
When particles are heated they begin to
Vibrate
Spin
Break down
Science
A hot drink has...
Kinetic Energy
Heat Energy
Thermal Energy
Nuclear Energy
A cyclist at the top of a hill has...
Kinetic Energy
Chemical Potential Energy
Elastic Potential Energy
Gravitational Potential Energy
Humans get their energy from...
Chemical Potential Energy
Thermal Energy
Kinetic Energy
Nuclear Energy
Energy stored in objects being stretched or squashed...
Elastic Potential Energy
Kinetic Energy
Chemical Energy
Thermal Energy
The energy going into an energy transfer is always equal to the energy coming out. True or False?
True
False
Batteries are an example of which type of energy store?
Thermal
Magnetic
Chemical
Gravitational potential
Which of these four examples are is an example of an energy transfer
Thermal
Elastic
Magnetic
Mechanical
If energy is transferred mechanically the object is being what?
pulled/pushed/stretched/squashed
shoved/pushed/light
sound/heat/pushed
electrically/pushed/sound/light
Conservation of energy means that...
Energy can be destroyed and made before being transferred
Energy can't be made or destroyed it can only transferred from one store to another
Energy can be made and destroyed
Energy can be made and destroyed then transferred from one store to another
Near the ceiling of a room the air is warmer. The warm air rises because of
conduction
convection
radiation
In heat transfer, heat always flows from the _______________ substance to the _______________ substance.
Hotter to colder
Colder to hotter
Hotter to hotter
Colder to colder
The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of
Convection
Conduction
Radiation
insulation.
An iron is placed on your clothes to smooth out the wrinkles. The iron transfers heat to your clothes through
conduction
convection
radiation
In which of the following state are the particles closest together?
Fluid
Gas
Liquid
Solid
What type of energy transfer occurs when hot water flows through cool water?
insulation
radiation
conduction
convection
Fossil fuels are being used at a much _________ rate than the rate they form at. As a result, it is predicted that they will run out.
Faster
Slower
Fossil fuels are ___________________ energy resources.
renewable
non-renewable
Which of these energy resources are renewable?(choose 2 answers)
crude oil
wind
solar
coal
What is a non-renewable energy resource?
An energy resource that will eventually run out.
An energy resource that won't run out.
How long does it take to produce fossil fuels?
hundreds of years
thousands of years
millions of years
billions of years
The three types of fossil fuel are natural gas, coal and ...
methane
oil
uranium
wood
In a thermal power station, the place where the fossil fuels are burnt is called the...
generator
turbine
condenser
furnace
What do we call the device which produces electricity in a power station?
turbine
condenser
generator
transformer
What turns the turbine in a thermal power station?
hamsters
water
air
steam
Why are we trying to use fossil fuelled power stations less?
Gases produced are bad for the environment.
It is an expensive way of making electricity.
Fossil fuels are running out.
Fossil Fuelled power stations leave very dangerous waste products for thousands of years.
Nuclear power is...
renewable
non-renewable
Uranium is a fossil fuel.
True
False
Nuclear power stations release carbon dioxide.
True
False
Nuclear fuel is relatively cheap and reliable.
True
False
Thermal Power Stations are reliable.
True
False
A man pushes a car with a force of 20N. He pushes it 5m. How much work is done?
4J
100J
50J
150J
A ball is thrown 25m with a force of 8N. What is the work done?
200J
175J
250J
225J
Work done and (a) are the same thing.
what is the product of force and displacement?
work
power
energy
what is the unit of work?
Newton
Joule
Watt
meter
A kettle has a power of 2500 W. What's the power in kW?
250 kW
2.5 kW
25 kW
0.25 kW
If a 4 kW oven was on for 2h cooking a joint of beef, how many units (kWh) of electrical energy were used?
8 kWh
4 kWh
2 kWh
0.5 kWh
