Light
What do all waves transfer from one place to another?
Energy
What type of error occured if one result is anomalous?
Random error
What is the range of pH for an alkali and what colour(s) it turn universal indicator?
pH 8-14, turns blue/purple
What is the name of the process in which scientists check their findings before they are published in a journal?
Peer review
Where is DNA found in the cell?
Nucleus
If the amplitude of a sound or light wave increases, how does this affect the sound or light?
Louder (sound), brighter (light)
What type of error occured if every result is out by the same amount?
Systematic error
If 16.7g of copper carbonate is heated and 5.1g of carbon dioxide is produced. How much copper oxide will be present?
16.7 - 5.1 = 11.6g
Why do we do experiments 3 times?
Identify anomalies to increase reliability
What is the function of a gene?
To provide instructions to make a protein
If the frequency of a sound/light wave increases, how does this affect the sound/light?
Higher pitch (sound), different colour (light)
Describe the forces present on an object for it to sink
Weight is greater than upthrust
What is the word equation for a combustion reaction?
Fuel + Oxygen -> Carbon dioxide + Water
When would we draw a bar chart and when would we draw a line graph?
Bar chart - discrete or discontinuous data
Line graph - Both continuous data
How are polar bears adapted to their environment?
White fur for camouflage
Fat for keeping warm
Small ears for heat retention
What happens to a ray of light during refraction?
Change in medium, light changes speed and therefore bends towards/away from the normal
Why does water pressure increase with depth?
The deeper underwater, the more mass/weight of water pushing down from above
What salt is produced in the reaction between sulfuric acid and potassium oxide?
Potassium sulfate
What does a food web show and name some parts of a food web.
It shows feeding relationships in a community. it contains producers and consumers. This can then be split into predators and prey.
What did Darwin notice about different finches?
They had different shaped beaks for adapting to different diets.
Describe an experiment to measure the speed of a sound wave
Pick a location with an echo (e.g. sports hall and a wall). Make a noise and time (stopwatch) how long it takes for the echo to return. Measure the distance (x2). Speed = distance/time
What happens to the extension of a spring as the force on it increases? Describe the relationship
As the force on a spring increases, so does the extension. It is directly proportional.
metal + acid -> ????
And how can we test for the gas?
salt + hydrogen
Lit splint, squeaky pop test
How could we sample the number of daisies in a field?
Use a quadrat in some random locations. Calculate a mean and multiply by the m2 of the field
How are seeds adapted for dispersal? Give examples
Wind, water, animals, explosions