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KS3 BCP 8 SYI

Total questions: 90

Worksheet time: 2hrs 55mins

Name
Class
Date
1.
What can affect a person's height? 
a)
Genetics 
b)
Environmental factors 
c)
Parents
d)
Genetics and environmental factors
2.
If a tall pea plant TT is crossed with a short pea plant tt (TT x tt) describe the traits of the offspring
a)
100% tall
b)
75% tall, 25% short
c)
50% tall, 50% short
d)
25% tall, 75% short
3.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
4.

What percent of offspring will have the recessive phenotype?

a)

25

b)

50

c)

75

d)

100

5.

In guinea pigs, the allele for short hair (H) is dominant and the allele for long hair (h) is recessive. When a dominant homozygous male and a heterozygous female are bred together, what is the predicted phenotype ratio for the offspring?

a)

1:1 short hair to long hair

b)

All have short hair

c)

1:3 short hair to long hair

d)

1:3 long hair to short hair

6.

Why does Scar have a scar but his brother Mufasa does not?

a)

Mufasa did not inherit it

b)

The scar gene skipped a generation

c)

The scar is an environmental trait

d)

Mufasa is not his brother

7.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
8.
What are the major structures in the nucleus that are made of DNA called?
a)
gene
b)
DNA
c)
chromosome
d)
mitochondria
9.

Which of the following are responsible for the traits which a person inherits?

a)

Nucleus

b)

Genes

c)

Cell

d)

Molecule

10.

A complete Punnett square here shows a cross between two mice with different fur color, agouti (A) and black (a). What is the probability of the recessive phenotype being expressed?

a)

25%

b)

50%

c)

75%

d)

100%

11.

An example of an inherited characteristic is:

a)

eye colour

b)

a tattoo

c)

a scar

d)

weight

12.

Selective breeding is...

a)

a process to create an organism with desired traits from parents with those desired traits

b)

natural method of producing offspring with desired traits

c)

creating a new species

d)

making organisms reproduce during times of stress

13.

Which of these is the first step in selective breeding flowers.

a)

Repeat the process only with the offspring with the desired traits

b)

watch the seeds grow

c)

Choose plants that have the desired trait to pollinate

d)

chose which trait is desirable

14.

Suggest a characteristic that would be useful in a new breed of sheep.

a)

leaner meat, quicker growing, greater yield, disease resistance,

b)

fattier meat, slower growing, less wool

c)

disease resistance, less wool, smaller yield

d)

better quality wool, leaner meat, less disease resistance

15.
Evidence shows that the wolf is the ancestor to all of the breeds of dogs shown below. How did this variation arise in a relatively short period of time?
a)

Genetic manipulation

b)
Natural selection
c)
Random chance
d)
Selective breeding
16.

What is an example of a trait that might be selected for in cows?

a)

High milk production

b)

Small size

c)

Low milk production

d)

Short lifespan

17.

Which of the following is NOT a reason for selective breeding?

a)

To make plants grow slower

b)

To create crops resistant to diseases

c)

To breed friendly pets

d)

To produce cows that give more milk

18.

What is the name of the process in which genes from one organism are transferred into the genome of another organism?

a)

Genetic Engineering

b)

Selective breeding

c)

Artificial selection

d)

Survival of the fittest

19.
A scientist inserts a gene into an apple that makes it resistant to drought from a bacteria. What is this an example of?
a)
Genetic engineering
b)
Natural selection
c)
Mutagenesis
d)
Genetic screening
20.

Mum is to parent as daughter is to

a)
Offspring
b)
Husband
c)
Girl
d)
Grandchild
21.

Selective breeding is where _____________ decides which traits should be passed on.

a)

nature

b)

a human

c)

traits

d)

evolution

22.
What is the net force?
a)
10 N
b)
0 N
c)
25 N
d)
1 N
23.
If these teams are pulling with the same amount of force what will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
24.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
25.

Which two of these forces act on parachutes?

a)

Air Resistance

b)

Gravity

c)

Thrust

d)

Kinetic Energy

26.

What causes an object to fall faster?

a)

Smaller surface area

b)

Larger surface area

c)

If it has a parachute

d)

If it is softer

27.

The more streamlined an object is, the...

a)

More air resistance

b)

Less air resistance

c)

Slower air resistance

d)

Faster air resistance

28.

When a falling object stops accelerating and falls at a constant speed, it is

a)

fluency

b)

constant velocity

c)

acceleration

d)

terminal velocity

29.

Air resistance is a force caused by...

a)

Water pushing against moving objects

b)

Air pushing against moving objects

c)

Gravity pushing against moving objects

d)

Normal force pushing against moving objects

30.

What happens to the direction of an object as an unbalanced force acts on it?

a)

It moves in the same direction as the force.

b)

It doesn’t change direction at all.

c)

It moves in the opposite direction of the force.

d)

Its speed changes.

31.

What happens to the position of an object as an unbalanced force acts on it?

a)

It causes no reaction.

b)

It causes gravity.

c)

It causes movement.

d)

It becomes balanced.

32.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

33.

What are the units of pressure?

a)

N m2

b)

N / m

c)

N m

d)

N / m2

34.

A Force of 200N acts on an area of 50cm2. What pressure does this cause?

a)

4 N/cm2

b)

1000 N/cm2

c)

150 N/cm2

d)

250 N/cm2

35.

What is the purpose of adding iron ore?

a)

As a source of iron

b)

To remove impurities

c)

To react with coke to form carbon monoxide

d)

To reduce iron oxide to iron

36.

Which gas reduces iron ore?

a)

CO

b)

CO2

c)

O2

d)

C

37.
What is the removal of oxygen from a substance called?
a)
reduction
b)
extraction
c)
electrolysis
d)
oxidation
38.

When is electrolysis used?

a)

To extract metals more reactive than carbon

b)

To extract metals less reactive than carbon

39.

Which diagrams A, B, C or D represent elements?

a)

A

b)

B

c)

C

d)

D

40.

Which diagram A, B, C or D represents a compound?

a)

A

b)

B

c)

C

d)

D

41.

Which of the options below is the correct definition of an compound?

a)

One type of atom on its own

b)

Atoms that have bonded between them

c)

Two or more types of atom chemically bonded

d)

Two or more types of atom not chemically bonded

42.

The diagram shows an element because...

(a)  

43.
What is an ore?
a)
a solid metal
b)
a rock cantaining a metal combined with other elements
c)
an element
d)
an object used to row a boat
44.
What is the name of the process that uses electricity to separate the elements in a compound?
a)
reduction
b)
electrolysis
c)
extraction
d)
mining
45.

How would you extract iron from haematite (iron ore)?

a)

reduction with carbon

b)

electrolysis

c)

decomposition

d)

oxidation

46.

Which element cannot be extracted from its ore by reduction with carbon?

a)

iron

b)

aluminium

c)

copper

d)

zinc

47.
Which series is used to predict the reactions of metals with carbon and other elements?
a)
reactionary series
b)
reaction series
c)
redox series
d)
reactivity series
48.

Name a metal that could be extracted from its metal oxide by heating with carbon.

a)

iron

b)

aluminium

c)

gold

d)

magnesium

49.

A method of extracting the most reactive metals, like potassium or aluminium.

a)

carbon extraction

b)

fractional distillation

c)

electrolysis

d)

cracking

50.

Copper

a)

CU

b)

Cp

c)

Cu

d)

Cr

51.

Iron

a)

Ir

b)

In

c)

Fe

d)

FE

52.

Potassium

a)

P

b)

K

c)

Pt

d)

k

53.

Gold

a)

Go

b)

Gl

c)

AU

d)

Au

54.

The turning effect of a force is called a

a)

moment

b)

momentum

c)

rotation

d)

pivot

55.

The point at which a lever or see-saw

balances or rotates.

a)

Pivot

b)

Moment

c)

Momentum

d)

Centre

56.

Where is the pivot on a crowbar?

a)

Point A

b)

Point B

57.

Where is the pivot on the wheelbarrow shown?

a)

Point A

b)

Point B

58.

The turning effect of force can make an object to turn in a ________________ and ___________ direction

a)

Clockwise and Anti-clockwise

b)

Up and Down

c)

Right and Left

59.

What TWO things does the

size of a moment depend on?

a)

the force applied

b)

the distance from the pivot

c)

the length of the object

60.

Moment (Nm) =


_______ (N) x __________(m)

a)

Force and perpendicular distance

b)

Energy and perpendicular distance

c)

Momentum and perpendicular distance

d)

Speed and time

61.

What is moment measured in?

a)

Newton metres (Nm)

b)

Newtons (N)

c)

Kilograms (kg)

62.

How could you increase the turning effect of a spanner?

Select TWO answers.

a)

hold the spanner closer to the pivot

b)

hold the spanner further away from the pivot

c)

use less force to turn the spanner

d)

use more force to turn the spanner

63.

A force of 5 N acts on a lever 2 m from the pivot. What is the size of the moment?

a)

10 Nm

b)

7 Nm

c)

3 Nm

d)

2.5 Nm

64.

A force of 12 N acts on a lever 3 m from the pivot. What is the size of the moment?

a)

36 Nm

b)

15 Nm

c)

9 Nm

d)

4 Nm

65.

What is the moment acting on the seesaw?


IF YOU ARE CONFUSED, LOOK BACK IN YOUR BOOK!

a)

1.6 Nm anticlockwise

b)

15 Nm anticlockwise

c)

4 Nm clockwise

d)

16 N clockwise

66.

What is the moment produced by the 15 N?

CONVERT cm into m

a)

1.5 Nm (anti-clockwise)

b)

15 Nm (clockwise)

c)

150 Nm (anti-clockwise)

d)

0.15 Nm (clockwise)

67.

When an object is in equilibrium, the sum of clockwise moments is equal to the sum of the anticlockwise moments. Which law states this?

a)

Law of moments

b)

Newton' law of motion

c)

Law of conservation of energy

d)

Law of conservation of momentum

68.

Calculate the weight of the father!


IF YOU ARE CONFUSED, LOOK BACK IN YOUR BOOK!

a)

600 N

b)

800 N

c)

700 N

d)

500 N

69.
What is the anticlockwise moment acting on this crane?
a)
80,000Nm
b)
100,000Nm
c)
120,000Nm
d)
140,000Nm
70.

A boy of weight 600N sits on the see-saw as shown at a distance of 1.5m from the pivot. What is the force F required at the other end to balance the see-saw?

a)

450 N

b)

350 N

c)

4.5 N

d)

200 N

71.

What is the size of the moment shown by the black arrow?

a)

30 Nm

b)

36 Nm

c)

40 Nm

d)

60 Nm

72.
Look at the pressure triangle. How do we calculate the force?
a)
f ÷ a
b)
f x p
c)
p x a
d)
f ÷ p
73.
Army tank tracks are useful for travelling through the mud because..
a)
they decrease the force the vehicle exerts on the ground
b)
they increase the force the vehicle exerts on the ground
c)
they decrease the pressure the vehicle exerts on the ground
d)
they increase the pressure the vehicle exerts on the ground
74.
Which of the statements is true?
a)
The bottom of the boot exerts more pressure than the shoe as a result of an increase in surface area.
b)
The bottom of the shoe exerts more pressure than the boot as a result of an decrease in surface area.
c)
The bottom of the shoe exerts the same pressure as the bottom of the boot.
75.
If the horse reared up on 2 legs what effect would it have on the pressure?
a)
it will exert half the pressure it did before
b)
it will exert the same pressure it did before
c)
it will exert twice the pressure it did before
d)
it will exert four times the pressure it did before
76.
A person wearing steel toe capped boots and a person wearing stilleto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?
a)
The person wearing the boots because the boots have a larger surface area in contact with the floor
b)
The person with the stiletto heels because they have a larger surface area in contact with the floor
c)
The person wearing the boots because the boots have a smaller surface area in contact with the floor 
d)
The person with the stiletto heels because they have a smaller surface area in contact with the floor
77.
What is the force up on the mailbox?
a)
1210 N
b)
8000 N
c)
7744 N
d)
5655 N
78.

A cube of 200N has a base area of 25cm2 and is resting on a table. What is the Pressure exerted by the cube on the table.

a)

0.8 Pa

b)

8 Pa

c)

0.8 N/cm2

d)

8 N/cm2

79.

A cube of 200N has a base area of 25cm2. What is the volume of the cube?

a)

25cm3

b)

125cm3

c)

250cm3

d)

2500cm3

80.

What is the pressure exerted by a 500N object on a surface area of 50cm2?

a)

50 N/cm2

b)

1 N/cm2

c)

100 N/cm2

d)

10 N/cm2

81.
Name a metal that could be extracted from its metal oxide by heating with carbon.
a)
iron
b)
aluminium
c)
gold
d)
magnesium
82.
Name a metal that occurs uncombined in the Earth�s crust.
a)
iron
b)
aluminium
c)
copper
d)
gold
83.
When a metal salt reacts with a more reactive salt, what sort of reaction occurs?
a)
Displacement
b)
Neutralisation
c)
Combustion
d)
No Reaction
84.
In nature, metals normally react with other compounds to form minerals. What is the metal that is found in the mineral Haematite?
a)
Copper
b)
Aluminium
c)
Iron
d)
Zinc
85.
Which series is used to predict the reactions of metals with carbon and other elements?
a)
reactionary series
b)
reaction series
c)
redox series
d)
reactivity series
86.
What is the name given to the solution that is being electrolysed?
a)
Salt solution
b)
Electric solution
c)
Mineral solution
d)
Electrolyte
87.
Explain why the electrolyte has to be a liquid.
a)
So the ions can move
b)
So the electrons can move
c)
So that it doesn't get too hot
d)
So the fish are ok
88.
What happens at the positive electrode?
a)
Positive non-metal ions are attracted
b)
Positive metal ions are attracted
c)
Negative non-metal ions are attracted
d)
Negative metal ions are attracted
89.
What is the removal of oxygen from a substance called?
a)
reduction
b)
extraction
c)
electrolysis
d)
oxidation
90.
Which element cannot be extracted from its ore by reduction with carbon?
a)
iron
b)
aluminium
c)
copper
d)
lead

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