Sc 7 Final Exam review

Science 7 Final Exam review

Describe the cycle of nutrients.

Describe the food chain.  Why does the food chain always need to start with a producer.

 What is agar?

Who was Anton van Leeuwenhoek and what did his invention mean for the advancement of science and the understanding of the world around us?

Name the five types of microorganisms.

Are all microorganisms the same size?  Explain by giving a specific example.

What is a microbiologist?

What type of microorganism can be single celled or multi-cellular?

Which type microorganism is so small that it cannot be seen by a regular microscope?

Describe Alexander Fleming's discovery of penicillin.

Describe the ideal conditions for the rapid multiplication of microorganisms.  Give one example where this is beneficial (good) and one example of when it might be detrimental (bad).

Define producer, consumer, and decomposer.

What are toxins?

Name the three common types of food poisoning.

Describe how botulism/salmonellosis/staph is caused.

Which type of food poisoning is the most common?  How might it be prevented?

What is meant by the term fermentation?

Why does rubbing salt into cod fish help to preserve it?

Why does food kept in the cold take longer to spoil?

Describe how a plant can react to stimulus in its environment.

Are vital signs voluntary or involuntary movements?

What is locomotion?

Describe how snakes achieve locomotion.

What is the difference between a vertebrate and an invertebrate?

Describe how human beings achieve locomotion.

Some organisms do not have lungs.  Name one and describe how it takes in and expels gases (oxygen, carbon dioxide, etc.).

What is meant by the term extinct?  Give one example of a mammal that is extinct.

Name a structural adaptation that animals use for protection.

Name two different methods of reproduction in organisms.

What is meant by the term variation?  Give an example in humans.

What is regeneration?  Give an example.

Give an example of a manufactured structure and a natural structure that serve the same function.

What is design?

Name two structures used by early humans and describe their functions.

Name two structures (one manufactured, one natural) that serve the function of shelter.

What does the term properties mean?  Give an example.

Use the following words in a sentence: load, stress, compression.

What is an alloy?  Why is using alloys often a wise design decision?

What is a beam?

How might you alter a design to make a beam stronger?

What is a cantilever?

Where is the tension/compression when a load is placed on a cantilever?

What is a brace?

Give an example of triangles being used in design.

What is the benefit of using a geodesic dome?

Why is corrugated cardboard stronger than regular cardboard?

Describe the process of stress being distributed in an arch.

List 2 mobile joints and 2 rigid joints.