Which is the following are contact forces?

Air Resistance, Friction, Normal Force, Applied Force

type of suspension that doesn’t separate easily

collects the gas that evaporates, then cools it down to form a liquid

the scientific study of naming and classifying living things

If forces on an object are balanced the object will ...

reamin still or continue at a constant speed

A Single Pulley is designed to do what?

change the direction of the force

A colloid of two or more liquids.

amount of gravitational pull towards the centre of the earth

A series of holes that let through small things but traps the larger ones

What is the correct order for obtaining salt from a mixture of sand and salt?

Dissolving in water - filtration - evaporation

A combination of 2 or more substances.

What is Crystallisation?

salt and water is heated, water evaporates to form salt crystals

What is Binomial Nomeclature?

Binomial = 2 name., Nomeclature = naming system

What is a suspension?

A mixture of two substances in which the solid is undissolved

The careful pouring of liquid from one container to container

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Year 7 Science Exam Revision

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Questions 46

Answers

1
If Tom and Matt are pulling with the same force (50N) in opposite directions, are the forces balanced or unbalanced
Unbalanced
Balanced
2
Which is the following are contact forces?
Magnetic separation, filtration
Gravity, Magentic Forces
Air Resistance, Friction, Normal Force, Applied Force
Electrostatic Forces, Nucelar Forces
3
Define Colloid
type of suspension that easily seperates
a combination of two or more substances
where all the particles are the same
type of suspension that doesn’t separate easily
4
These are examples of what type of lever?
3rd
1st
4th
2nd
5
Which is the solute - Salt in water
Water
Salt
6
Define Distillation
is a machine that spins very quickly causing heavy particles to move down
collects the gas that evaporates, then cools it down to form a liquid
The careful pouring of liquid from one container to container
a series of holes in it that let through small things & traps the large
7
Define Taxonomy
gravitational pull towards the center of the earth
the mixture of 2 or more substances
the scientific study of naming and classifying living things
2 name, naming system
8
Soluble or insoluble - Salt in Water
Soluble
Insoluble
9
What type of lever is this?
2nd
1st
3rd
4th
10
If forces on an object are balanced the object will ...
reamin still or continue at a constant speed
Slow down
change shape
Speed up
11
What would be the best method to seperate salt from water?
Centrifuging
Evaporation
Crustallisation
Filtration
12
What does the K stand for?
Kingdom
Kinetic
Kind
King
13
What is weight measures in?
Litres
Mg's
Newtons
Kg's
14
A Single Pulley is designed to do what?
change the direction of the force
chnage the speed of the object
chnage the shape of the object
change the size of the force
15
Define Emulsion
where all the particles are the same
A mixture of one substance dissolved evenly in another substance.
A colloid of two or more liquids.
A suspension that doesn’t separate easily
16
Soluble or Insoluble - Pepper in cold Water
Soluble
Insoluble
17
Who invented classification?
James Cook
Alexander the Great
Carl Linnaeus
Charles Darwin
18
Define weight
what the scales say you are
amount of gravitational pull towards the centre of the earth
amount of matter you are made up of
how heavy you are
19
Which is the solvent - Gatorade poweder in water
Gatorade Powder
Water
20
Attract or Reulsion?
Repulsion
Attraction
21
What does the S and O stand for?
Season, Open
Species, Organised
Species, Order
Simple, Order
22
Which animal has the following characterisitcs: no fur, no feathers, internal fertilisation
Rabbit
Reptiles
Birds
Amphibians
23
What does P stand for?
Private
Party
Phylum
Particular
24
Define Filtration
spins very quickly causing the heavier particles to move to the bottom
Magnets attracting metal materials
Collects gas, cools that down then makes a liquid again
A series of holes that let through small things but traps the larger ones
25
What is the correct order for obtaining salt from a mixture of sand and salt?
Filtration - dissolving in water – evaporation
Evaporation - filtration - dissolving in water
Filtration – evaporation – dissolving wat
Dissolving in water - filtration - evaporation
26
A solute dissolved in a solvent makes a?
Mess
Solution
Suspension
Colloid
27
MRNGREWW is an acronym used to remember the 8 characteristics of living things
True
False
28
Chromatography is used to seperate what?
Alcohol and water
Salt and water
Sand and water
Dyes
29
What is a mixture?
One substance dissolved evenly in another substance
Where all the particles are the same
A combination of 2 or more substances.
A combination of 3 or more liquids
30
What is a force?
Push
All of the above
Twist
Pull
31
Which is not a Non Contact Force?
Gravity
Friction
Magnetic Force
Electrostatic Force
32
What is Crystallisation?
water is heated, starts to boil, this means it starts to evaporate = gas
salt and water is heated, water evaporates to form salt crystals
Red blood cells (heavier), separate from the plasma and platelets
lollies in a mixed lollies bag and chosen by hand
33
What is mass measured in?
Mililitres
Newtons
Litres
Kg's
34
Does mass change from the earth to the moon for any object?
Yes
No
35
What is Binomial Nomeclature?
Binomial = 2 name., Nomeclature = naming system
Binomial = 4 name, Nomeclature = naming sytstem
Binomail = 1 name, Nomenclature = 2 name
Binomial = 3 name, Nomeclature = dichotomus key
36
What are the 3 components that make up a lever?
fulcrum, leverage, attempt
1st, 2nd, 3rd class
flight, lift, acceleration
fulcrum, load, effort
37
What is the net force of the following?
100N
950N
50N
450N
38
Attraction or Repulsion?
Repulsion
Attraction
39
The animal kingdom is divided into two main groups. What are the names of these two groups?
Fur and No fur
Vertebrates and Invertebrates
Cold Blooded and Warm Blooded
Exoskeletons and Endoskeletons
40
What is a suspension?
The careful pouring of liquid from one container to container
a large amount of solute dissolved in a substance
A mixture of two substances in which the solid is undissolved
a mixture of one substance dissolved evenly in another substance
41
I weigh more on the moon than the earth
False
True
42
Unbalanced forces cause ...
Change of direction
Change of shape
All of the above
Change of speed
43
What is decanting?
The careful pouring of liquid from one container to container
a series of holes in it that let through small things & traps the large
collects the gas that evaporates from a mixture, cooling it to a liquid
is a machine that spins very quickly causing heavy particles to move down
44
Friction can be reduced by?
Bearings
All of the above
Streamlining
Lubricants or Oils
45
Which is Saturated?
Far right
Middle
Second from the left
Far left
46
Which of the following is not part of the 5 kingdoms of living things?
Anamalia
Aves
Fungi
Monera

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