Science revision KS3

What is an Eclipse?

When the Moon comes between the sun and the Earth

What is a bone?

Rigid Organ

What is a joint?

A joint is a connection between two bones
You can get a fused

What is an example of a luminous object?

The sun

What is an example of a non-luminous object?

Moon

What happens when the diaphragm contracts/flattens?

Your diaphragm contracts

What does a new moon look like?

completely dark

What is a Lunar Eclipse?

When the Earth passes between the Sun and the Moon

What is a star?

A huge luminous ball of gas held together by gravity

List the planets in order?

Mercury

What is Pluto?

It is a dwarf planet

What is lung volume?

The capacity of the lungs (how much air they can hold)

What happens when you exhale?

• Your diaphragm goes up (relaxes)
• Volume inside your chest decreases
• The pressure inside your chest increases- this pushes the air out of your lungs.

Where are red blood cells produced?

Bone marrow

Order these:
Cell
Organism
Organ System
Organ
Tissue

Cell
Tissue
Organ
Organ System
Organism

What are the 4 functions of your skeleton?

• Move
• Support
• Protect
• Make Red and White Blood Cells

What are the 6 body systems?

Skeletal
Nervous
Respiratory
Muscular
Circulatory
Digestive

What are the symptoms of anaemia?

Fatigue
Weakness
Pale skin
Cold hands and feet
Dizziness
Reduced immunity - more prone to infections
Shortness of breath

What is an antagonistic muscle?

A pair of muscles that work together to relax and contract

Force

A vector quantity that causes an object to undergo a change in motion

Newton

The SI unit of force

Mass

A measure of the amount of matter in an object

Friction

A force that opposes the relative motion of two surfaces in contact

Balanced Forces

Forces that are equal in size but opposite in direction

Unbalanced Forces

Forces that are not equal and opposite

Skull

The bony structure that forms the head

Clavicle

Also known as the collarbone

Scapula

Commonly referred to as the shoulder blade

Humerus

The long bone in the upper arm that runs from the shoulder to the elbow.

Rib Cage

The bony structure formed by the ribs that protects the thoracic cavity and organs such as the heart and lungs.

Vertebrae

The individual bones that stack to form the spine

Pelvis

The bony structure at the base of the spine that supports the weight of the upper body and connects the legs.

Femur

The thigh bone

Patella

Also known as the kneecap

Tibia

The larger and stronger of the two bones in the lower leg

Fibula

The thinner bone located alongside the tibia in the lower leg

Carpals

The eight small bones that make up the wrist

Metacarpals

The five bones that form the middle part of the hand.

Phalanges

The bones of the fingers and toes

Satellite

An object that orbits a planet or star.

Phases of the Moon

The eight distinct stages of lunar visibility.

Orbiting

The path an object takes around another body.

Earth's Rotation Time

24 hours for a full rotation on its axis.

Earth's Orbit Time

365.25 days to complete an orbit around the sun.

What does a Catalyst do?

speeds up the rate of a chemical reaction

What are some signs of a chemical reaction taking place?

See flames or sparks