Science Exam

Exam - 04.11.25

The Human eye can see several thousand stars daily

True

what culture is the longest-standing culture to this day

Both are correct

100% of humans live under light pollution

False - only 80% of humans live under light pollution

How many moons orbit the Earth

1

How are tides caused?

Gravitational forces

How many tides does earth get per day?

Two high tides and Two low tides

How many seasons do we (NSW) get per year

4

What is the right temperature for Spring?

Warming up

What is the right temperature for Winter?

Cool to Cold

What is the right temperature for Autumn?

Cooling

What is the right temperature for Summer?

Warm to hot

What months does the Northern Hemisphere experience Winter? 

December, January, February

What months does the Southern Hemisphere experience spring?

Sepetember, Octotber, November

How does a SOLAR eclipse work?

the SUN - MOON - EARTH all in a line

How does a LUNAR eclipse work?

The SUN - EARTH - MOON all in a line 

What is the first phase of the moon

New Moon

How many QUARTERS are in the mooning phase

2 - First quarter and the Third Quarter

What phase of the moon comes after the First Quarter?

the waxing gibbous

What phase of the moon comes after the full moon?

the waning gibbous

What phase of the moon comes before the Waning Crescent?

the Third Quarter

What is a spring tide?

An extremely low tide

What is a Neap Tide

An extremely high tide

What is the difference between a Monocular Microscope and a Stereo Microscope?

A monocular microscope utilises a single eyepiece, providing a 2D image for viewing small, transparent, or thinly sliced samples, such as cells. In contrast, a stereo microscope has two optical paths, offering a low-magnification, 3D image of larger, opaque objects like insects or circuit boards

In Magnification, what does x10 X x4 =

x40

In Magnification, what does x10 X x10 =

x100

In Magnification, what does x10 X x40 =

x400

You should always place a microscope on a rough surface 

false

What is the Mitochondria

The powerhouse of a cell

animals have a cell wall

false - only plants do

What does a ribosome do

Is responsible for protein synthesis

What is matter (in a solution/mixture)

Contains the volume and mass

an element is the basic substance that cant be broken down, no matter how hard you try

true

What is water

a compand

Zinc is an element

True

What does it mean to decent things

to carefully pour off liquid from a mixture

what process does filtration carry

to separate a mixture of solid particles from a liquid

what is the first class on the classification ladder

D - Domain

what is the third class on the classification ladder

P - Phylum

what is the sixth class on the classification ladder

F - Family

what is the seventh class on the classification ladder

G- Genus

What are the 8 letters for the classification ladder

D

K

P

C

O

F

G

S

Define Dichotomous

Meaning to divide into two parts

Fossils show that vertebrates have existed for at least 516 million years

True

When (year) was the cell theroy of life proposed

1839

The cell is a basic unit of life

true

Cells are not building blocks for life

false

What are the two main catergories for mircoscops

Light Mircoscopes and Electron Mircoscopes

Define Filtration

the process of separating a mixture of solid particles from a liquid

Define Distillation

the separation technique of a solution by evaporation the solvet, leaving behind solute crystal

Define Compress

squash something into a smaller shape

define matter

any substance that has mass and takes up space

define atom

a particle that makes up all matter, made up of protems, neutrons and electrons

define molecure

a unit made up of two or more atoms chemically bonded to eachother

define sublimation

changing state from a solid to a gas

Solid particles are

The particles are closely packed into a regular pattern - spaces between the particles vibrate in one place - they cannot move around eachother

Liquid particles are

The particles are closely packed in no fixed pattern - spaces between the particles are relatively smalll but particles can move around each other

Gas Particles are

The particles are far apart from eachother - the spaces between the particles are relatively small, but particles can move around each other

define a depenant varable

what you measure

define an indepent varable

the one you will change

define a controlled varable

things you keep the same

What is density

density is the measue of the mass an object per unit volume

does the water temp affect buoyancy

yes

What are forces

A force can change the speed, direction or shape of an object.

what are contact forces

contact forces are simply a force that invloves contacts

Magnetic forces must attract with contact 

false

If you have a smooth surface, how much friction will you get

less friction

If you have a rougher surface, how much friction will you get

more friction