B3 Science revision flashcards

B3- Life on Earth

What is the definition of a species?

Why do species adapt to the Environment?

How does a cactus adapt to the Environment?

How does a fish adapt to the Environment?

Why may a species become extinct?
Give examples

What is the purpose of a food chain?

What happens in a food chain when animals eat?

Give an example of how animals depend on each other for survival

What is the purpose of a food web?

How can Environmental changes alter a food web?
Give an example

What will happen if a food webs change is too great?

Where do living things get energy from?

How is energy transferred?

What is an eco-system?
Give an example

What must an eco-system contain?
Give definitions

What are the two types of heterotrophs?

How are materials such as nitrogen recycled?

Can energy be recycled?
Give your reasons

Why is an input from the Sun always needed?

What are the stages of energy transfer in a food chain?

What is a detritivore?
Give an example

What happens to the energy at each stage?

Why is there a limit to the length of a food chain?

How did the first living things develop?

To this day, what is still unknown about the first molecules?

What did experiments on simple molecules lead too?

How can the Nitrogen Cycle be recycled?
Give examples where possible

How can the Carbon Cycle be recycled?
Give examples where possible

What do all organisms share?
Give examples where neccessary

What is the fossil record?

What is DNA Evidence?

What is the theory behind DNA Evidence?

What is Darwin's theory of the evolution of natural selection?

What is genetic variation caused by?
Can it be passed on?

Can Environmental information be passed on?

What is selective breeding?
What purpose is selective breeding used for?

What is biodiversity?

What would happen if there wasn't much variety?

Give an example of a bad way to sustain biodiversity

What ways can you reduce the amount of packaging?
Give examples

Why do we need to reduce the amount of packaging?