Mix of everything Flashcards
Where do most organisms that live in water get oxygen from?
Dissolved oxygen.
A herbivore needs to find what type of food from its surroundings?
Plants.
What is a decomposer?
Something that breaks down the dead and decaying organic matter.
What happens to the total biomass available as you move up a food chain?
It decreases.
What level is the biomass greatest in a food chain?
The bottom.
How do you work out the energy lost from a food chain at each stage?
Energy lost = difference / original x 100
What colour will a Bunsen flame be when the air hole is open?
Blue.
Zinc + oxygen -> ?
Zinc oxide.
Which gas that causes rusting is excluded if an iron chair is coated in plastic?
Oxygen.
Name the product produced by the combustion of hydrogen.
Water.
What is a reactant?
A substance that takes part in and undergoes change during a reaction.
Name a reactant in this reaction: methane + oxygen -> carbon dioxide + water
Methane or oxygen.
Name the gas produced when baking powder is heated.
Carbon dioxide.
What is oxidation?
A chemical change that involves the transfer of electrons or oxygen among atoms.
What reaction is rusting?
Redox.
