Unit 4 Atomic structures
The current atomic models is proposed by this scientist
Ernest Rutherford
Functions of carbs and fats
energy
Jenny ran 355m in 90s. Give the answers in m/s.
3.94 m/s
What is the chemical symbol for gold? Write on the board.
Au
Give at least 3 metals arranged in the Reactivity Series
Potassium, Sodium, Calcium, Magnesium, Aluminium, Carbon, Zinc, Iron, Tin, Lead, Hydrogen, Copper, Silver, Gold
It prevents constipation
Fibres
What is moment?
Turning moment
What is the fastest land animal?
Cheetah
Give 2 properties of metals.
Ductile,Malleable,Shiny,Conduct heat,Conduct electricity
What is joint?
THE PLACE WHERE TWO BONES MEET ONE ANOTHER
Draw on the board the distance-time graph to show a stationary phase.
Answer on the board
Cell.
iron + copper sulfate ->
iron + copper sulfate -> iron sulfate + copper
3 components in the cigarettes and their effects
Nicotine - addictive
Tar - cancer
Carbon monoxide - reduce oxygen transport
A moment of 1.8Nm is needed to turn the brake lever. The distance of the pivot on the brake handle is 0.09m. Find the force with the unit.
20N
What is the largest organ in the human body?
Skin
sodium + potassium nitrate ->
sodium + potassium nitrate -> sodium + potassium nitrate / no reaction
Describe bioaccumulation
toxins build up and affect the top of the food chain the most.
Zara weighs 450N. Zara sits on a seesaw at a distance of 1.5m from the pivot.
Sofia weighs 500N. She sits on the other side of seesaw.
Calculate the distance from the pivot that Sofia must sit to balance the seesaw. Show your working on the board.
1.35m
What is the name of the process when a solid changes directly into a gas?
Sublimation.