Cell Biology
What are all living organisms made of?
one or more cells
What force pulls objects toward Earth?
gravity
What is all matter made of?
atoms
What is the pH of a neutral solution?
7
What is a producer?
An organism that makes its own food.
Which cell structure controls the activities of the cell?
the nucleus
What force opposes motion through air?
air resistance
What is an element?
a substance made from one type of atom
What colour does Universal Indicator usually show in a strong acid?
red
What do the arrows in a food chain show ?
what eats what
Which structure controls what enters and leaves a cell?
cell membrane
What form of energy is stored in food?
chemical
What is a molecule ?
Two or more atoms chemically bonded.
What happens to red litmus paper in an alkali?
red litmus paper changes to a blu color in an alkali solution
What is a decomposer's role in a food chain?
Break down dead organisms and recycle nutrients back into the soil.
What is the function of chloroplasts?
photosynthesis
What is dissipated energy?
Energy that is transferred into a less useful form, usually spread into surroundings
What is a compound?
Two or more different elements chemically bonded.
A solution of NaOH is mixed with a solution of HCl that is the same concentration. What is produced by this reaction ?
sodium chloride and water
What gets transferred in a food chain ?
energy
Which organelle releases energy from food?
mitochondria
What form does disippated energy often take in machines?
heat
What happens to atoms during a chemical reaction?
The atoms get rearranged to form new substances.
A solution of NaOH is mixed with a solution of HCl that is the same concentration. What is the pH of the soltion formed ?
7
What is an omnivore?
An animal that eats both plants and animals.