Yearly Science

Question 1

Essential components of a circuit

Answer 1

Wire, Cell, Power Source

Question 2

Difference between Series and parallel circuit

Answer 2

Series circuits are when components are connected next to each other and parallel circuits are when the path divides into two or more.

Question 3

What is a current

Answer 3

The rate at which electricity flows through a conductor.

Question 4

What is Voltage

Answer 4

The difference in electrical energy between two points.

Question 5

Ohm’s law

Answer 5

at a constant temperature, the electrical current flowing through a fixed linear resistance is directly proportional to the voltage applied across it.

Question 6

Use of ammeter

Answer 6

To measure electrical current

Question 7

Use of Voltmeter

Answer 7

To measure electrical difference between 2 points

Question 8

Symptoms of non-infectious diseases

Answer 8

• fatigue is a symptom of non- infectious disease as energy is being put in to defend the body making the body more tired.
• Fever
• loss of appetite
• Malaise
• sweating

Question 9

Symptoms of infectious diseases

Answer 9

• Fever is a common defense against infectious diseases as the body increases its temperature to make the immune system more active.
• Diarrhea
• Fatigue
• Muscle Aches
• Coughing

Question 10

Chemical Defenses

Answer 10

• Enzymes and Chemicals

- Antimicrobial Peptides

Question 11

Physical Barrier

Answer 11

• Skin
• Mucus
• Saliva

Question 12

Disease

Answer 12

A malfunciton in the human body or organ because of a pathogen

Question 13

Symptom

Answer 13

Any phenomenon that serves evidence of an event

Question 14

Pathogen

Answer 14

A disease causing agent

Question 15

Antigen

Answer 15

Any substance that creates antiboies

Question 16

Antibody

Answer 16

A Y-shaped protein used as a primary defense against pathogens

Question 17

How bacteria can be resistant to antibiotics

Answer 17

When people take antibiotics they kill the ones that are not resistant and leave the ones that are to multiply more

Question 18

describe using examples how developments in technology have advanced biological understanding

Answer 18

Technologies such as the microscope have helped us understand our biological understanding as it allows us to see how bacteria move and react under certain conditions

Question 19

The law of conservation of energy

Answer 19

Energy cannot be created or destroyed it can only be transformed and transferred

Question 20

Renewable sources of energy

Answer 20

• Geothermal
• Wind as there is an unlimited source of wind as long as the sun is still burning.
• Solar

Question 21

Non-renewable

Answer 21

• Coal
• Oil
• Nuclear

Question 22

Describe how in energy transfer the end will not be 100% efficient

Answer 22

Things such as heat are created when energy is transferred and transformed which reduces the total amount of useful energy making it not 100% efficient

Question 23

Identify the structure of the earth

Answer 23

1. Crust The uppermost layer of the Earth.
2. Mantle The second most upper layer of the Earth right above the Outer Core.
3. Outer Core a dense layer that contains superheated rock or magma.
4. Inner Core a super dense layer which contains solid iron and heavy metals as the pressure from the other layers compound onto it making it a solid

Question 24

Describe evidence about continental drifts

Answer 24

The continents seem to piece it together

Fossils can be found away from their origin

Question 25

Define Plate boundaries

Answer 25

• Divergent
• Convergent
• Transform

Question 26

Atom

Answer 26

A fundamental piece of matter

Question 27

Elements

Answer 27

A substance that is made only with one type of atom

Question 28

Molecules

Answer 28

A substance that has two or more of the same element bonded together

Question 29

Compounds

Answer 29

A substance that has two or more types of elements bonded together

Question 30

Alkaline Metals

Answer 30

Group 2

Question 31

Alkali metals

Answer 31

Group 1