General Sciences
How many chromosomes should there be in a healthy (human) cell.
46
What is the difference between plant and animal cells?
plant cells have cell walls and chloroplasts.
State the composition of oxygen in clean, dry air.
21%
A car travels at a constant speed of 20 meters per second. How far will it travel in 5 seconds ?
100 meters
what is the ratio of the circumference and diameter of a circle called?
pi
Argon, Krypton, Xenon
Which type of blood vessels carries blood away from the heart?
Veins
Name the products formed when magnesium reacts with dilute hydrochloric acid.
Magnesium chloride and hydrogen gas
A bicycle accelerates from rest at a rate of 2 m/s² for 5 seconds. Calculate the final velocity of the bicycle.
10m/s
how many sides does a dodecagon have?
12
What does a vector quantity describe
Magnitude, Unit and Direction
What body structure protects the lungs from outside harm?
Rib Cage
What does a catalyst do in a chemical reaction?
It increases the rate of a reaction, decreases the activation energy, Ea, of a reaction and is unchanged at the end of a reaction.
A ball is thrown vertically upwards with an initial velocity of 15 m/s. How long will it take for the ball to reach its maximum height? (Assume acceleration due to gravity = 9.8 m/s2
1.53 seconds
Lynn's quarterly water bill is £22.75. How much does she pay per year?
91
State Newtons first Law of Motion
Provide the correct sequence of the pathway through which air travels after entering the body.
Pharynx, larynx, trachea, bronchioles
Give any three properties of transition metals:
have high densities, have high melting points, have variable oxidation numbers
A block of mass 2 kg is placed on a frictionless incline that makes an angle of 30 degrees with the horizontal. Calculate the acceleration of the block as it slides down the incline.
4.9m/s2
Neal, Austin, and Claire play ball. Austin scores eight more points than Claire, and Claire scores five less than three the number of points as Neal.If they score 89 points total, how many points does Austin score?
42 points
A substance that can't be broken down into simpler substances using any chemical means is
An element
What does DNA stand for?
Dioxyribonucleic acid
For a reversible reaction, how is the position of the equilibrium affected by changing the pressure.
Increasing the pressure shifts eq to the side with fewer moles of gas, whereas decreasing the pressure shifts eq to the side with greater moles of gas.
A circuit consists of a battery of emf 12V and two resistors connected in series: one with resistance 3 ohms and the other with resistance R. If the total current in the circuit is 2A, find the value of R.
3 ohms
The length of the Princeton basketball court is five more than twice the width. If the perimeter of the court is 112 meters, how long is the court?
x=6 or x=3