PHYSICS
Give 3 examples of non renewable energy?
nuclear, oil, coal.
What Is an Alloy?
Alloys are mixtures containing at least one metal.
State two features that are present in plant cells that are not present in the cells of reptiles?
cellulose / cell wall ; chloroplast / chlorophyll ; starch grains ;
(large / permanent / central) vacuole ;
What type of rocks would you find at the bottom of the Mississippi River?
wet rock
Where is the only place where today comes before yesterday?
The dictionary
State two ways in which evaporation is different from boiling.
Two of:
Evaporation takes place at the surface
No bubbles (rise to surface during evaporation)
Evaporation lowers temperature of liquid
Evaporation takes place at any temperature
Evaporation lowers temperature of liquid
Name first 5 elements from periodic table
What is a characteristic of all living organisms?
movement reproduction respiration sensitivity
growth excretion nutrition
I am excellent to taste, but horrible to smell. What am I?
A tongue
State two safety precautions used by people handling radioactive substances?
use of gloves, tweezers, lead / concrete, maintain distance, minimise exposure time.
The charge built up on the cloud before the lightning flash is 0.60 C. This charge is completely transferred to the ground by the lightning flash in 5.0 x 10-s (0.000050s).
Calculate the current between the cloud and the ground.
12000A
Add the missing state symbols to the chemical equation for the reaction. MgCO3 ..... + 2HCl ..... → MgCl 2(aq) + H2O ..... + CO2 .....
MgCO3(s)+ 2HCl(aq)→ MgCl2(aq) + H2O(l)+ CO2(g)
State two roles of blood clotting.
prevent blood loss ;
prevent entry of (named), pathogens / microbes ; ref. to wound healing / tissue repair ;
What gets shorter as it grows older?
A candle.
A rectangular container has a base of dimensions 0.12m × 0.16m. The container is filled with a liquid. The mass of the liquid in the container is 4.8kg.
i) Calculate the weight of liquid in the container,
weight =
ii) the pressure due to the liquid on the base of the container.
Pressure=
i) 48N
ii) 2500PA
A diver uses breathing apparatus under water at a depth where the pressure is 1.25 × 105 Pa.
A bubble of gas breathed out by the diver has a volume of 20 cm3 when it is released. The bubble moves upwards to the surface of the water.
At the surface of the water, the atmospheric pressure is 1.00 × 105 Pa.
The temperature of the water is the same at all depths.
What is the volume of this bubble when it reaches the surface of the water?
25 cm³
SiH, reacts spontaneously with oxygen to produce a white solid and a colourless liquid. No other products are formed.
Write an equation for the reaction of SiH, with oxygen.
State symbols are not required.
SiH4 + 202 -> Si02 + 2H20
The distance between X and Y on the diagram below is 80mm. The actual length of the cell between X and Y was 160 μm.
×500
What did scientists say when they found 2 isotopes of Helium
hehe
State the name of one mineral required for the synthesis of chlorophyll.
Iron or magnesium
A plane is at rest on an airport runway. The brakes of the plane are released and the engine of the plane provides a constant accelerating force.
Using the following data, calculate the take-off speed of the plane. Ignore any resistive forces.
constant forward force = 56000 N
mass of plane = 16000 kg
time of travel along runway = 16s
56m/s
Three processes are listed.
burning methane in air radioactive decay of 235U reacting hydrogen with oxygen.
Which statements about these processes are correct?
1 Hydrogen and methane are being used as fuels.
2 All the processes involve oxidation.
3 All the processes are used to produce energy.
A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3
1 and 3 only
What are the four major types of tissue found in animals?
epithelial, connective, muscle and nerve tissues
What has 13 hearts but no other organs?
A deck of cards.
Balanced chemical equation for anaerobic respiration in yeast
C6H12O6 ⟶ 2C2H5OH + 2CO2 + 2ATP