Summer Exam Yr10 Flashcards
Why do we have day and night
Day is when we face the sun and night is when the sun faces the other 1/2 of the earth
Planets
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus.
Neptune
What is a galaxy
A collection of gas dust, stars and their solar system
What is gravity
An invisible force that pulls objects towards the earths core
What is the equation for weight
Weight = mass x gravitational pull
What are shadows
When the sun is High in the sky
Bulb symbol
In book
Switch symbol
Voltmeter
Ameter
Resistor
Variable resistor
Series circuit
Parallel
Attracted magnets
Repel magnets
Electromagnet
What is pressure
A force exerted over a surface
How is pressure calculated
Pressure = force / area
What is the unit of pressure
Pa or N/m2
High pressure and low pressure examples
High - thumb pins, stiletto heel
Low - tractor tiles, ballon on bed of nails
What is density
The mass of objects per unit volume
How is density calculated
Density = mass / volume
How do u find density of a irregular/regular shape object
Regular - calculate volume
Irregular - displacement method (volume before and after)
What is a longitudinal wave
Vibrations travel in the direction of wave
Look at wave diagram
What should u do when drawing reflection I’m a plane mirror
Draw a normal line
Always measure from normal line to beam of light
Put direction arrows on beam of light
Angle of I=r
I=R meaning
I= angle of incident
R= angle of reflection
What happens when light travels from air into a denser medium like glass or water?
It refracts towards the normal
What happens when light travels from air denser medium into air
It will refract away from the normal
Look at reflection diagrams
