Biology
What are the products of photosynthesis?
oxygen and glucose
Why can magnesium displace iron from an ionic compound?
it is more reactive
watt
What piece of equipment can we use to measure a fixed volume of a liquid?
measuring cylinder
How many hearts do worms have?
5
Alveoli
What charge ions do metals from when they react?
positive
Convert 203kJ into joules
203,000J
What are the safety steps to reduce the risk of using Bunsen burners?
tie hair back
safety goggles
bags to the side, stools tucked in
standing up
safety flame when not using the Bunsen burner
How often do you replace your stomach lining?
3-5 days
Which part of the plant transports water from the roots to the leaves?
xylem
Why do elements react?
To gain a full outer shell
rearrange this equation to find the energy
power = energy/time
energy = power x time
What is the independent variable?
The one we change
How far away is our nearest star (excluding the sun)
Why does a plant grow faster in bright sunlight?
Increased rate of photosynthesis, more glucose so more cellulose/protein for growth
yellow
what is specific heat capacity?
The amount of energy required to increase the temperature of 1 kg of a substance by 1 degree celsius
Why do we repeat experiments and calculate a mean?
Makes results more accurate
What colour is a polar bears skin?
Black
What is the name for a cell without a nucleus?
Prokaryote
What are the products when sulfuric acid reacts with copper oxide?
copper sulfate and water
Why does a sponge float on water?
It is less dense
How do you make a bunsen burner have a 'safety flame'?
Turn the collar so the air hole is closed
What colour is liquid oxygen?
blue